GEMINI™ SELECT 38APS025-050,38APD025-100 Commercial Air-Cooled Condensing Units with COMFORTLINK™ Controls 50/60 HzControls, Start-Up, Operation, Service, and Troubleshooting CONTENTS Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .1,2 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Conventions Used in This Manual . . . . . . . . . . . . . . . . 2 Display Module Usage . . . . . . . . . . . . . . . . . . . . . . . . . . 17 • SCROLLING MARQUEE DISPLAY • ACCESSORY NAVIGATOR™ DISPLAY MODULE Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . . . . 18 Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . . . 18 Energy Management Module (EMM) . . . . . . . . . . . . . 18 Compressor Expansion Module (CXB) . . . . . . . . . . 19 AUX Board (AUX). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Enable/Off/Remote Contact Switch . . . . . . . . . . . . . . 19 Emergency On/Off Switch . . . . . . . . . . . . . . . . . . . . . . . 19 Board Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Control Module Communication. . . . . . . . . . . . . . . . . 19 Carrier Comfort Network® (CCN) Interface. . . . . . . 20 OPERATING DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-33 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 • RETURN AIR TEMPERATURE (RAT) ACCESSORY • SUPPLY AIR TEMPERATURE (SAT) ACCESSORY • COMPRESSOR RETURN GAS TEMPERATURE SENSOR (RGT) • OUTDOOR-AIR TEMPERATURE SENSOR (OAT) • DISCHARGE TEMPERATURE THERMISTOR (DTT) • SPACE TEMPERATURE SENSOR (SPT) Fan Status Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Thermostat Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Pressure Transducer Inputs . . . . . . . . . . . . . . . . . . . . . 23 Energy Management Module . . . . . . . . . . . . . . . . . . . . 23 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Operation of Machine Based on Control Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Set Point Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 • DEMAND LIMIT (2-Stage Switch Controlled) • EXTERNALLY POWERED DEMAND LIMIT (4 to 20 mA Controlled) • DEMAND LIMIT (CCN Loadshed Controlled) Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . . . 32 Digital Scroll Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 System Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-49 Preliminary Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Adjust Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . 34 Check Compressor Oil Level . . . . . . . . . . . . . . . . . . . . 47 Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Page Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Actual Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 • AMBIENT LIMITATIONS • VOLTAGE (ALL UNITS) Operation Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-59 Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . 49 • CONTROL COMPONENTS Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Pressure Transducers. . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Condenser Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Motormaster® V Controller . . . . . . . . . . . . . . . . . . . . . . 54 • GENERAL OPERATION • CONFIGURATION • DRIVE PROGRAMMING • EPM CHIP • LOSS OF CCN COMMUNICATIONS • TROUBLESHOOTING • REPLACING DEFECTIVE MODULES Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59,60 Recommended Maintenance Schedule . . . . . . . . . . 59 Microchannel Heat Exchanger (MCHX) Condenser Coil Maintenance and Cleaning Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 60-66 Complete Unit Stoppage and Restart. . . . . . . . . . . . 60 • GENERAL POWER FAILURE • UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS OFF • FAN STATUS INPUT OPEN • OPEN 24-V CONTROL CIRCUIT BREAKER(S) • COOLING LOAD SATISFIED • THERMISTOR FAILURE • COMPRESSOR SAFETIES Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 APPENDIX A — DISPLAY TABLES . . . . . . . . . . . 67-78 APPENDIX B — CCN TABLES . . . . . . . . . . . . . . . . 79-84 START-UP CHECKLIST FOR 38AP SPLIT SYSTEM CONDENSING UNIT . . . . . . . . . . . . . . . . . . . . CL-1-CL-5 SAFETY CONSIDERATIONS Installing, starting up, and servicing this equipment can be hazardous due to system pressures, electrical components, and equipment location (roof, elevated structures, mechanical rooms, etc.). Only trained, qualified installers and service mechanics should install, start up, and service this equipment. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53380003-01 Printed in U.S.A. Form 38AP-1T Pg 1 210 11-09 Replaces: New When working on this equipment, observe precautions in the literature, and on tags, stickers, and labels attached to the equipment, and any other safety precautions that apply. Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting this equipment, and in handling all electrical components. GENERAL This publication contains Controls Start-Up, Service, Operation, and Troubleshooting information for the Gemini™ Select 38AP condensing units with ComfortLink controls. See Table 1 for unit size information. Table 1 — Unit Sizes NOMINAL CAPACITY, TONS, 60 Hz 25 27 30 40 50 60 70 80 90 100 WARNING 38AP UNIT SIZE Electrical shock can cause personal injury and death. Shut off all power to this equipment during installation and service. There may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work is completed. WARNING DO NOT VENT refrigerant relief valves within a building. Outlet from relief valves must be vented outdoors in accordance with the latest edition of ANSI/ASHRAE (American National Standards Institute/American Society of Heating, Refrigeration and Air Conditioning Engineers) 15 (Safety Code for Mechanical Refrigeration). The accumulation of refrigerant in an enclosed space can displace oxygen and cause asphyxiation. Provide adequate ventilation in enclosed or low overhead areas. Inhalation of high concentrations of vapor is harmful and may cause heart irregularities, unconsciousness or death. Misuse can be fatal. Vapor is heavier than air and reduces the amount of oxygen available for breathing. Product causes eye and skin irritation. Decomposition products are hazardous. 025 027 030 040 050 060 070 080 090 100 CONTROLS General — The 38AP air-cooled condensing unit contains the ComfortLink™ electronic control system that controls and monitors all operations of the unit. The control system is composed of several components as listed in the sections below. See Fig. 1-3 for typical control box drawing. See Fig. 4-17 for power and control wiring. Conventions Used in This Manual — The following conventions for discussing configuration points for the local display (scrolling marquee or Navigator™ accessory) will be used in this manual. Point names will be written with the mode name first, then any sub-modes, then the point name, each separated by an arrow symbol (. Names will also be shown in bold and italics. As an example, the Lead/Lag Circuit Select Point, which is located in the Configuration mode, Option sub-mode, would be written as Configuration OPT2LLCS. This path name will show the user how to navigate through the local display to reach the desired configuration. The user would scroll through the modes and sub-modes using the and keys. The arrow symbol in the path name represents pressing ENTER to move into the next level of the menu structure. When a value is included as part of the path name, it will be shown at the end of the path name after an equals sign. If the value represents a configuration setting, an explanation will be shown in parenthesis after the value. As an example, ConfigurationOPT2LLCS = 2 (Circuit A leads). Pressing the ESCAPE and ENTER keys simultaneously will scroll an expanded text description of the point name or value across the display. The expanded description is shown in the local display tables but will not be shown with the path names in text. The CCN (Carrier Comfort Network®) point names are also referenced in the local display tables for users configuring the unit with CCN software instead of the local display. The CCN tables are located in Appendix B of the manual. WARNING DO NOT attempt to unbraze factory joints when servicing this equipment. Compressor oil is flammable and there is no way to detect how much oil may be in any of the refrigerant lines. Cut lines with a tubing cutter as required when performing service. Use a pan to catch any oil that may come out of the lines and as a gage for how much oil to add to system. DO NOT re-use compressor oil. CAUTION This unit uses a microprocessor-based electronic control system. Do not use jumpers or other tools to short out components, or to bypass or otherwise depart from recommended procedures. Any short-to-ground of the control board or accompanying wiring may destroy the electronic modules or electrical components. CAUTION Puron® refrigerant (R-410A) systems operate at higher pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment. If service equipment is not rated for Puron refrigerant, equipment damage or personal injury may result. CAUTION Refrigerant charge must be removed slowly to prevent loss of compressor oil that could result in compressor failure. 2 AUX C CB CCHR CSB EMM EQUIP GND FB FC LON MBB SW TB TRAN UPC LEGEND — Auxiliary — Contactor — Circuit Breaker — Crankcase Heater Relay — Current Sensor Board — Energy Management Module — Equipment Ground — Fuse Block — Fan Contactor — Local Operating Network — Main Base Board — Switch — Terminal Block — Transformer — Unitary Protocol Converter Fig. 1 — Component Arrangement — Unit Sizes 025-030 3 AUX C CB CCH CSB EMM EQUIP GND FC FCB LON MBB MM SW TB TRAN UPC — — — — — — — — — — — — — — — — LEGEND Auxiliary Contactor Circuit Breaker Crankcase Heater Relay Current Sensor Board Energy Management Module Equipment Ground Fan Contactor Fan Circuit Breaker Local Operating Network Main Base Board Motormaster® Switch Terminal Block Transformer Unitary Protocol Converter Fig. 2 — Component Arrangement — Unit Sizes 040-060 4 . 3 — Component Arrangement — Unit Sizes 070-100 5 .AUX C CB CCH CSB CXB EMM EQUIP GND FC FCB LON MBB SW TB TRAN UPC — — — — — — — — — — — — — — — — LEGEND Auxiliary Contactor Circuit Breaker Crankcase Heater Relay Current Sensor Board Compressor Expansion Board Energy Management Module Equipment Ground Fan Contactor Fan Circuit Breaker Local Operating Network Main Base Board Switch Terminal Block Transformer Unitary Protocol Converter Fig. 4 — Power Wiring Schematic — 38APS.APD025-030 6 .Fig. 050 7 .Fig. 5 — Power Wiring Schematic — 38APS040. Fig. 6 — Power Wiring Schematic — 38APD040-060 8 . Fig. 7 — Power Wiring Schematic — 38APD070-100 9 . Fig. 8 — Control Wiring Schematic — 38APS025-050 10 . Fig. 9 — Control Wiring Schematic — 38APD025-060 11 . 10 — Control Wiring Schematic — 38APD070-100 12 .Fig. For 575-3-60 units. MP-A1 not used in the following units: 070-100: 400-v. ACCSY ALM AMPS AUX C CB CCB CCH CH COMP CSB CXB DGS DPT DTT DUS EMM EQUIP GND FB FC FCB FIOP FR FS FU GND HPS LLSV LVT MBB MLV MM MP NEC OAT OFM OPT PL RAT RGT RLY SAT SEN SET SPT SW TB TEMP TRAN UPC Y — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — 13 . MP-A2 not used in the following units: 070-100: 400-v.Legend and Notes for Fig. Use 75 C minimum wire for field power supply. See field interlock wiring. For units with low ambient Motormaster® V factory-installed option or field-installed acessory. 3. 460-v 14. Terminals 13 and 14 of LVT are for field connection of remote on-off. fan circuit breakers FCB1 and FCB2 are replaced with fuse blocks FB1 and FB2. 460-v units without digital scroll 10. Threephase motors protected against single-phase conditions. 6. 9. Compressor and fan motors are thermally protected. MP-A3 not used in the following units: 090. 4-10 LEGEND Accessory Alarm Amperes Auxiliary Contactor Circuit Breaker Compressor Circuit Breaker Crankcase Heater Relay Crankcase Heater Compressor Current Sensor Board Compressor Expansion Module Digital Scroll Discharge Pressure Transducer Discharge Temperature Thermistor Digital Unloaded Solenoid Energy Management Module Equipment Ground Fuse Block Fan Contactor Fan Circuit Breaker Factory-Installed Option Fan Relay Fan Status Fuse Ground High Pressure Switch Liquid Line Solenoid Valve Low Voltage Terminal Main Base Board Minimum Load Valve Motormaster Modular Motor Protector National Electrical Code Outdoor Air Thermistor Outdoor Fan Motor Option Plug Return Air Temperature Return Gas Temperature Relay Supply Air Temperature Sensor Terminal Block Set Point Terminal Block Suction Pressure Transducer Switch Terminal Block Temperature Transformer Unitary Protocol Converter Cool Stage NOTES: 1. MP-B3 not used in the following units: 070: all units 080-100: 400-v. 4. All field interlock contacts must have a minimum rating of 2 amps at 24-vac sealed. 5. The contact must be rated for dry circuit application capable of handling a 5-vdc. 1 mA to 20 mA load. 460-v 13. Jumper plug required when modular motor protector is not used. TRAN1 primary connections must be moved to terminals H3 and H4. 7.100: 400-v. For 500 series unit operation at 208-3-60 line voltage. 8. Any field modifications or additions must be in compliance with all applicable codes. Factory wiring is in accordance with UL (Underwriters Laboratories) 1995 standards. 460-v 11. MP-B1 not used in the following units: 070: all units 080-100: 400-v. 460-v 15. MP-B2 not used in the following units: 070: all units 080-100: 400-v. fan contactors FC1 and FC2 are replaced with fan relays FR1 and FR2. 2. 460-v 12. 1 amps to 420 amps is 2 AWG to 600 kcmil. c. Refer to certified dimensional drawings for exact locations of the main power and control power entrance locations. Incoming wire size range for non-fused disconnect with MCA from 200. Main power must be supplied from a field or factory-supplied disconnect. a. Incoming wire size range for terminal block with MCA from 175. Incoming wire size range for terminal block with MCA (minimum circuit amps) up to 175 amps is 14 AWG (American Wire Gage) to 2/0.1 amp to 450 amps is 3/0 to 500 kcmil. Factory wiring is in accordance with UL 1995 standards. 3. b. motor current detection. e. All units or modules have single point primary power connection. Use copper conductors only. Fig.a38-7122 LEGEND EQUIP GND — Equipment Ground NEC — National Electrical Code NOTES: 1. Field modifications or additions must be in compliance with all applicable codes.1 amp to 200 amps is 6 AWG to 350 kcmil. 4. d. 12 — MAT/RAT and SAT Sensor Layout 14 . Wiring for main field supply must be rated 75 C. Incoming wire size range for non-fused disconnect with MCA up to 100 amps is 14 AWG to 1/0. Fig. or sail switch. 11 — Field Power Wiring a38-7133 RETURN AIR MAT/RAT FS1* SAT OUTSIDE AIR FAN DUCT SUPPLY FS1 MAT RAT SAT — — — — LEGEND Fan Status Switch (24-v) Mixed Air Temperature Sensor Return Air Temperature Sensor Supply Air Temperature Sensor EVAPORATOR COIL *FS1 can be pressure differential switch (shown). 2. Incoming wire size range for non-fused disconnect with MCA from 100. 12 for MAT/RAT and SAT location. †Not required for single circuit units. 13 — Constant Volume Application Wiring Diagram 2-Stage Thermostat Control. Fig. 14 — Constant Volume Application Wiring Diagram 2-Stage Thermostat Control — with Digital Scroll Option. Sizes 025-030 — without Digital Scroll Option 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 LVT TERMINAL STRIP COOL2 COOL 1 SEE NOTE 6 LLSV-B* LLSV-A ALM R REMOTE ON/OFF FS 1 SEE NOTE 6 LLSV-B * LLSV-A ALM R REMOTE ON/OFF FS 1 *See Fig. a38-7126 Fig. Sizes 025-100 15 SEE NOTE 6 LLSV-B † LLSV-A ALM R REMOTE ON/OFF SA . Sizes 025-030 or All Sizes 040-100 LVT TERMINAL STRIP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 FS 1 SPT MAT/RAT * SAT * a38-7127 *See Fig. 12 for MAT/RAT and SAT location.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 LVT TERMINAL STRIP COOL 2 a38-7125 COOL 1 *Not required for single circuit units. Fig. 15 — Constant Volume Application Wiring Diagram Space Temperature Sensor Control. †Not required for single circuit units. and 2 of the LVT are for the control of the field-supplied LLSV. Use copper conductors only. Refer to certified dimensional drawings for exact locations of the main power and control power entrance locations. 3. Incoming wire size range for terminal block with MCA from 175. 7. c. Fig. Incoming wire size range for non-fused disconnect with MCA up to 100 amps is 14 AWG to 1/0. NOTES: 1. Incoming wire size range for non-fused disconnect with MCA from 100. 25. T-59) Field Control Wiring a. Main power must be supplied from a field or factorysupplied disconnect. 16 . 13-17 ALM R COOL1 COOL2 FS1 LLSV LVT MAT RAT SA SAT SPT — — — — — — — — — — — LEGEND Alarm Relay (24-v). 5. The maximum load allowed for the LLSV is 15-va sealed and 30-va inrush at 24-v. The maximum load allowed for the alarm relay is 5-va sealed and 10-va inrush at 24-v. 12 for MAT/RAT and SAT location. 5-va Maximum Thermostat Stage 1 (24-v) Thermostat Stage 2 (24-v) Fan Status Switch (24-v) Liquid Line Solenoid Valve Low Voltage Terminal Mixed Air Temperature Sensor Return Air Temperature Sensor Set Point Adjustment (T-56. 9. Incoming wire size range for terminal block with MCA (minimum circuit amps) up to 175 amps is 14 AWG (American Wire Gage) to 2/0. e. Factory wiring is in accordance with UL 1995 standards. 16 — Variable Air Volume Application Wiring Diagram. COOLING SETPOINT/ CAPACITY REQUESTED 4-20 mA a38-7129 + DEMAND LIMIT 4-20 mA – 4. LLSV (24-v) should be 15-va maximum per valve as required. Terminals 24. d.1 amp to 450 amps is 3/0 to 500 kcmil. 2. Incoming wire size range for non-fused disconnect with MCA from 200. b. 8. Installation of fan status switch (FS1) is recommended. The contacts for remote ON/OFF.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 LVT TERMINAL STRIP MAT/RAT * SAT * a38-7128 *See Fig. Wiring for main field supply must be rated 75 C. Sizes 025-100 SEE NOTE 6 LLSV-B † LLSV-A ALM R REMOTE ON/OFF FS 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 LVT TERMINAL STRIP + DEMAND LIMIT STEP 1 DEMAND LIMIT STEP 2 TEMP RESET 4-20 mA – + – Fig.1 amps to 420 amps is 2 AWG to 600 kcmil. All units or modules have single point primary power connection. Field power supply is not required. Field modifications or additions must be in compliance with all applicable codes. Terminals 1 and 2 of the LVT are for the alarm relay. T-59) Supply Air Temperature Sensor Space Temperature Sensor (T-55. and demand limit options must be rated for dry circuit application capable of handling a 24-vac load up to 50 mA. 6. T-56. †Not required for single circuit units. 17 — Optional Energy Management Module Wiring Legend and Notes for Fig. Field power supply is not required.1 amp to 200 amps is 6 AWG to 350 kcmil. fan status. Items in the Configuration and Service Test modes are password protected. ComfortVIEW™ and Service Tool. and confirm the value by pressing the ENTER key. Clear language descriptions will be displayed in English. These keys are used to navigate through the different levels of the display structure. an ENTER key. Locate and display the desired item. and an ESCAPE key. the display will flash showing the operator. See Fig. See Fig. Use the up and down arrow keys to change the value. Repeat the process as required for other items. the item name appears on the left of the display.Display Module Usage SCROLLING MARQUEE DISPLAY — This device is the keypad interface used for accessing unit information. or units display will resume. Press the ESCAPE key until the display is blank to move through the top 11 mode levels indicated by LEDs on the left side of the display. all appropriate display expansions will immediately change to the new language. Changing item values or testing outputs is accomplished in the same manner. Press ENTER so that the item value flashes. reading sensor values. Continue with the remaining digits of the password. The scrolling marquee display is a 4-key. Pressing the ESCAPE and ENTER keys simultaneously will scroll a clear language text description across the display indicating the full meaning of each display acronym. See Appendix A — Display Tables for further details. Press the ESCAPE key to exit out of the expanded text mode. The default password is 1111. Use the arrow keys to change the number and press ENTER to enter the digit. Use the ENTER and arrow keys to enter the 4 digits of the password. Changing item values or testing outputs is accomplished in the same manner. Press the ESCAPE key and the item. Press the ESCAPE key until ‘Select a Menu Item’ is displayed to move through the top 11 mode levels indicated by LEDs on the left side of the display. Press the ENTER key again so that the item value flashes. ACCESSORY NAVIGATOR™ DISPLAY MODULE — The Navigator module provides a mobile user interface to the ComfortLink™ control system. the item. When a specific item is located. variable is changed. Repeat the process as required for other items. 19. 4-character. the value will appear near the middle of the display and the units (if any) will appear on the far right of the display. Press the ENTER key at a changeable item and the value will begin to flash. Eleven mode LEDs are located on the display as well as an Alarm Status LED. Pressing the ESCAPE and ENTER keys when the display is blank (Mode LED level) will return the scrolling marquee display to its default menu of rotating display items. Use the arrow keys to change the value or state and press the ENTER key to accept it. NOTE: When the Language Selection (Configuration DISPLANG). These keys are used to navigate through the different levels of the display structure. When a specific item is located. the password will be disabled. items and their values can be displayed. Items in the Configuration and Service Test modes are password protected. See Table 2. the password will be disabled requiring that it be entered again before changes can be made to password protected items. a “>” indicates the currently selected item on the display screen. The password can only be changed through CCN operator interface software such as ComfortWORKS®. requiring that it be entered again before changes can be made to password protected items. No power-off or control reset is required when reconfiguring languages. Press the ENTER key to stop the display at the item value. and testing the unit. The words Enter Password will be displayed when required. Locate and display the desired item. 16-segment LED (light-emitting diode) display. an ESCAPE key. In addition. Pressing the ENTER and ESCAPE keys simultaneously will put the Navigator module into expanded text mode where the full meaning of all sub-modes. . Press ENTER to stop the display at the item value. Press the ESCAPE key to return to the next higher level of structure. which is only available as a field-installed accessory. Pressing the ENTER and ESCAPE keys when the display says ‘Select Menu Item’ (Mode LED level) will return the Navigator module to its default menu of rotating display items (those items in Run StatusVIEW). MODE Run Status Service Test Temperature Pressures Setpoints Inputs Outputs Configuration Time Clock Operating Modes Alarms Alarm Status ENT ER Com for tL ink MOD E Run Serv Temp Pres Statu s ice Te st eratu res s Alarm Statu s sure ints Setpo Inputs Outpu Confi ts tion Time Cloc k Oper ating Mode Alarms s gura ESC ESCAPE ENTER Fig. The display has up and down arrow keys. and an ENTER key. Use the arrow keys to change the value or state of an item and press the ENTER key to accept it. value. The display will flash PASS and WORD when required. 18 — Scrolling Marquee Display The scrolling marquee display module provides the user interface to the ComfortLink™ control system. followed by the item value and then followed by the item units (if any). In addition. The default password is 0111. The display has up and down arrow keys. 19 — Accessory Navigator Display Module Once within a Mode or sub-mode. 17 Fig. with 1111 also being displayed. 18. Current Sensor Board (CSB) — The CSB is used to monitor the status of the compressors by measuring current and providing an analog input to the main base board (MBB) or compressor expansion module (CXB). The MBB is the heart of the ComfortLink control system. To adjust the backlight of the Navigator module.B) Cooling (COOL) Head Pressure (HEAD) INPUTS Unit Discrete (GEN. Use the up or down arrows to adjust the contrast. The factory default is set to the highest level. current sensor boards (CSB) and thermistors. The CCN (Carrier Comfort Network®) bus is also supported. Press ENTER to obtain access to this mode. press the ESCAPE key until the display reads. The display will read: > TEST OFF METR OFF LANG ENGLISH Pressing ENTER will cause the “OFF” to flash. Main Base Board (MBB) — See Fig.” Using the arrow keys move to the Configuration mode. See Table 3. The MBB receives inputs from the discharge and suction pressure transducers. temperature reset. The EMM module receives 4 to 20 mA inputs for the percent capacity. It contains the major portion of operating software and controls the operation of the machine.I) Ckt A/B (CRCT) Unit Analog (4-20) OUTPUTS Unit Discrete (GEN. and demand limit functions. Adjusting the Backlight Brightness — The backlight of the display can be adjusted to suit ambient conditions. The EMM module communicates the status of all inputs with the MBB. The EMM module also receives the switch inputs for the field-installed 2-stage demand limit and when two thermostats are used for one unit. The MBB continuously monitors input/output channel information received from its inputs and from all other modules.B) CONFIGURATION Display (DISP) Unit Configuration (UNIT) CCN Network (CCN) Options 1 (OPT1) Options 2 (OPT2) Motormaster (M.L) Schedule Number (SCH.B) Ckt A Pressures (PRC. Information is transmitted between modules via a 3-wire communication bus or LEN (Local Equipment Network). The MBB also receives the discrete inputs from the thermostat contacts and other status switches. cooling set point. The screen’s contrast will change with the adjustment. The display will read: > TEST OFF METR OFF LANG ENGLISH Pressing ENTER will cause the “OFF” to flash. Pressing the up and down arrow keys simultaneously allows the user to adjust the display brightness.” Using the arrow keys move to the Configuration mode. Use the up or down arrow to change “OFF” to “ON”. The Navigator module will keep this setting as long as it is plugged in to the LEN bus. 20. The Navigator module will keep this setting as long as it is plugged in to the LEN bus. the location of items in the menu structure will be described in the following format: Item Expansion (Mode Name Sub-mode Name ITEM) 18 . press the ESCAPE key until the display reads. “Select a menu item. “Select a menu item. and the MBB adjusts the control point. Use the up or down arrow keys to adjust screen brightness.MST) Reset Cool Temperature (RSET) Set Point Select (SLCT) Service Configuration (SERV) Broadcast Configuration (BCST) LEGEND — Circuit TIME CLOCK Unit Time (TIME) Unit Date (DATE) Daylight Saving Time (DST) Local Holiday Schedules (HOL.A) Ckt B Temperatures (CIR.Adjusting the Contrast — The contrast of the display can be adjusted to suit ambient conditions.L) Schedule Overide (OVR) OPERATING MODES Modes (MODE) Task State (TSKS) ALARMS Current (CRNT) Reset Alarms (RCRN) Alarm History (HIST) Ckt *Throughout this text.N) Local Schedule Number (SCH. Press ENTER to obtain access to this mode. Pressing ENTER will illuminate all LEDs and display all pixels in the view screen.O) Ckt A (CIR. Table 2 — Scrolling Marquee Display Menu Structure* MODE RUN STATUS Auto Display (VIEW) Machine Hours/Starts (RUN) Compressor Run Hours (HOUR) Compressor Starts (STRT) Preventive SUB-MODE Maintenance (PM) Software Version (VERS) SERVICE TEST Manual Mode On/Off (TEST) Unit Outputs (OUTS) Ckt A Comp Tests (CMPA) Ckt B Comp Tests (CMPB) SET TEMPERATURES PRESSURES POINTS Unit Temperatures (UNIT) Ckt A Temperatures (CIR. Use the up or down arrow keys to change “OFF” to “ON”.A) Ckt B Pressures (PRC. capacity limit. Connections to both LEN and CCN buses are made at the LVT (low voltage terminal) terminal strip. Pressing ENTER and ESCAPE simultaneously allows the user to adjust the display contrast. Energy Management Module (EMM) — The EMM module is available as a factory-installed option or as a fieldinstalled accessory.A) Ckt B (CIR. The MBB also controls several outputs. Pressing ENTER will illuminate all LEDs and display all pixels in the view screen. Press ENTER to accept the change. Press ENTER to accept the change. and other functions according to the inputs received. See Table 4. To adjust the contrast of the Navigator module. the unit is allowed to operate and respond to the scheduling configuration. the red status LEDs should be blinking in unison at a rate of once every 2 seconds. These 3 wires run in parallel from module to module. the unit is under its own control.STATUS GREEN LED LEN (LOCAL EQUIPMENT NETWORK) YELLOW LED CCN (CARRIER COMFORT NETWORK) INSTANCE JUMPER CEPL130346-01 K11 K10 K9 J1 J2 STATUS K8 K7 K6 K5 J4 J3 LEN J10 K4 K3 K2 K1 CCN J5 J6 J7 J8 J9 Fig.’ All other boards have 4-position DIP switches. Control Module Communication RED LED — Proper operation of the control boards can be visually checked by looking at the red status LEDs (light-emitting diodes).18 LVT 16. Emergency On/Off Switch — The Emergency On/Off switch should only be used when it is required to shut the unit off immediately. If the red LEDs are not blinking in unison.4 MBB J8-7.13.2 MBB J8-3. GREEN LED — The MBB has one green LED. LVT 19. All other boards have a LEN LED which should be blinking whenever power is on. All switches are set to ‘On’ for all boards. Power to the MBB. 50 mA load. replace the MBB. 20 — Main Base Board Table 3 — Thermistor Designations THERMISTOR INPUT Return Air (Accessory) Supply Air (Accessory) Compressor Return Gas Temperature A Compressor Return Gas Temperature B Outdoor Air Temperature Discharge Temperature (Digital Option Only) Space Temperature (Accessory) PIN CONNECTION POINT MBB J8-11.20 MBB J8-12.18 LVT 15. The Carrier Comfort Network (CCN) LED will blink during times of network communication. If necessary. reload current software. Move the switch to the Off position to shut the unit down.12. The J4 connector on the MBB provides both power and communication directly to the marquee display only. CCN configuration and set point data. AUX Board (AUX) — The AUX is used with the digital scroll option and the low ambient head pressure option. The Local Equipment Network (LEN) LED should always be blinking whenever power is on.19 MBB J8-1.2 MBB J8-5. Be sure that the main base board (MBB) is supplied with the current software. It provides additional inputs and outputs for digital scroll control along with analog outputs to control head pressure control fan speeds.14 MBB J6-4 MBB J6-6 Compressor Expansion Module (CXB) — The CXB is only used on unit sizes 070-100 to provide additional inputs and outputs for fans and compressors when the unit has more than 4 compressors. Communication between modules is accomplished by a 3-wire sensor bus.RED LED . Enable/Off/Remote Contact Switch — The Enable/ Off/Remote Contact switch is a 3-position switch used to control the unit. Move the switch to the Remote Contact position and a field-installed dry contact can be used to start the unit. LVT 21. Board Addresses — The main base board (MBB) has a 3-position Instance jumper that must be set to ‘1. AUX. verify that correct power is being supplied to all modules. See Fig. CXB.8 AUX J6-1.18 LVT 13. Check LEN connections for potential communication errors at the board J3 and/or J4 connectors.6. and scrolling marquee display is interrupted when this switch is off and all outputs from these modules will be turned off. YELLOW LED — The MBB has one yellow LED. In the Enable and Remote Contact (dry contacts closed) . 21. If the problem still persists. 19 Table 4 — Switch Inputs SWITCH INPUT Thermostat Y1 (Accessory) Thermostat Y2 (Accessory) Fan Status 1 (Accessory) Fan Status 2 (Accessory) Remote On/Off High Pressure Switch A High Pressure Switch B PIN CONNECTION POINT LVT 12.22 positions. The contacts must be capable of handling a 24 vac. LVT 11. When operating correctly.18 LVT 17. A red LED that is lit continuously or blinking at a rate of once per second or faster indicates that the board should be replaced. EMM. When switched to the Enable position. See Table 5. vinyl. 2. 22. or Columbia (02525) meets the above mentioned requirements. A short in one section of the bus can cause problems with all system elements on the bus. the resulting continuous shield must be connected to a ground at one point only. The positive pin of each system element communication connector must be wired to the positive pins of the system elements on either side of it. This is also required for the negative and signal ground pins of each system element. See Fig. It is recommended that red be used for the signal positive. Wire manufactured by Alpha (2413 or 5463). white (ground). Sensors — The electronic control uses 3 to 7 thermistors to 20 . (Substitute appropriate colors for different colored cables. tinned copper. the shields must be connected to grounds at the lightning suppressor in each building where the cable enters or exits the building (one point per building only). Regular Wiring Plenum Wiring 1895 — A21451 A48301 8205 884421 D6451 — M13402 M64430 6130 — OPERATING DATA sense temperatures for controlling unit operation.36 F. Run new cable if necessary. IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting. RETURN AIR TEMPERATURE (RAT) ACCESSORY (Part No. 10 kat 77 F (25 C). The sensor temperature range is –40 to 245 F with a nominal resistance of 10. 2-conductor 18 AWG twisted-pair cables. It is important when connecting to a CCN communication bus that a color coding scheme be used for the entire network to simplify the installation. PVC/nylon. Teflon. check the CCN connector and cable. Enable/Off/Remote Contact Switch. The RJ14 CCN connector on LVT can also be used. but is only intended for temporary connection (for example. a laptop computer running Service Tool). At each system element. unplug the connector. NOTE: Conductors and drain wire must be 20 AWG (American Wire Gage) minimum stranded. To connect the unit to the network: 1. chrome vinyl. 21 — Scrolling Marquee. The system elements are connected to the communication bus in a daisy chain arrangement. the white wire to COM terminal. of unshielded. If the communication bus cable exits from one building and enters another. Three different thermistor curves are utilized depending on the thermistor and the configuration of the input. The RAT sensor consists of a thermistor encased within a stainless steel probe. and Emergency On/Off Switch Locations Carrier Comfort Network® (CCN) Interface — The 38AP units can be connected to the CCN if desired. Connect the red wire to (+) terminal on LVT of the plug. The three different types are 5 kat 77 F (25 C). The sensor is field installed in the indoor unit and wired to the LVT of the unit to measure the air temperature entering the evaporator coil. Consult the CCN Contractor’s Manual for further information. 33ZCSENSAT) — A return air temperature sensor is required for unit sizes 040-100 and all units equipped with the digital scroll option. Belden (8772). If conditions return to normal. Wiring connections for CCN should be made at LVT. The sensor probe is 6 in. See Thermistors section on page 49 for additional information. 4. The communication bus wiring is a shielded. 3-conductor cable with drain wire and is supplied and installed in the field. and white for the signal ground. nominal length with 114 in. An aluminum/polyester 100% foil shield and an outer jacket of PVC. black for the signal negative. the shields of its communication bus cables must be tied together. or polyethylene.SCROLLING MARQUEE DISPLAY CB1 REMOTE CONTROL CB2 CB3 OFF SW2 ON SW1 OFF LEGEND CB — Circuit Breaker SW — Switch ENABLE ENABLE/OFF/REMOTE CONTACT SWITCH EMERGENCY ON-OFF SWITCH Fig. Cut the CCN wire and strip the ends of the red (+). and black (–) conductors. and the black wire to the (–) terminal. Turn off power to the control box. The sensor has with an accuracy of ±0. Use a similar scheme for cables containing different colored wires.) 3. PVC/nylon. American (A22503). See Table 3.000 ohms at 77 F. The sensor should be located directly in front of the evaporator coil after an outside air intake. These sensors are outlined below. or Teflon with a minimum operating temperature range of –20 C to 60 C is required. Table 5 — CCN Communication Bus Wiring MANUFACTURER Alpha American Belden Columbia Manhattan Quabik PART NO. If abnormal conditions occur. Individual conductors must be insulated with PVC. and 86 k at 77 F (25 C). If the communication bus is entirely within one building. 3. The SAT sensor probe is 6 in. Connect one wire of the twisted pair to one SEN terminal and connect the other wire to the other SEN terminal located under the cover of the space temperature sensor. DISCHARGE TEMPERATURE THERMISTOR (DTT) — This sensor is only used on units with a digital compressor. 22 — 33ZCSENSAT Sensor SUPPLY AIR TEMPERATURE (SAT) ACCESSORY (33ZCSENSAT) — A supply air temperature sensor is required for unit sizes 040-100 and all units equipped with the digital scroll option.36 F. 21 . They are a 5 k thermistor connected to the main base board. The SAT sensor consists of a thermistor encased within a stainless steel probe. This sensor is a 86 k thermistor connected to the AUX board.01 Dia 5. The sensor has an accuracy of ±0.00 1 2 3 4 5 . of unshielded. twisted pair cable may be used. Allow at least 4 ft between the sensor and any corner. The standard CCN communication cable may be used. OUTDOOR-AIR TEMPERATURE SENSOR (OAT) — This sensor is factory installed on a bracket which is inserted through the base pan of the unit on the unit sizes 025-060 and mounted to the back of the control box on the unit sizes 070100.250 ±. See Fig. 24) • Space temperature sensor (33ZCT59SPT) with occupancy override button. Connect the other ends of the wires to terminals 21 and 22 on LVT located in the unit control box.08 SW1 SEN 6 RED(+) WHT(GND) BLK(-) CCN COM . This sensor is a 5 k thermistor connected to the main base board. The sensor temperature range is –40 to 245 F with a nominal resistance of 10.5 PLENUM RATED CABLE 114'' ±6 NOTE: All dimensions shown in inches.D.175 DIA x .40'' O. NOTE: The sensor must be mounted in the discharge of the unit. Connect the T56 set point adjustment between the SET terminal and LVT terminal 23. 25): 1. and LCD (liquid crystal display) display Fig.000 ohms at 77 F. COMPRESSOR RETURN GAS TEMPERATURE SENSOR (RGT) — These sensors are factory installed in a friction fit well located in the suction line of each circuit.600 . set point adjustment slidebar. Use a three-conductor shielded cable for the sensor and set point adjustment connections. Mount the sensor at least 2 ft from an open doorway. Be sure the probe tip does not come in contact with any of the unit surfaces. 22. It attaches to the discharge line using a spring clip and protects the system from high discharge gas temperature when the digital compressor is used. Fig. 2-conductor 18 AWG twisted-pair cables.3. 23) • Space temperature sensor (33ZCT56SPT) with timed override button and set point adjustment (see Fig. downstream of the cooling coil and before any heating coil or heat exchanger if reheat is utilized. . 23 — Space Temperature Sensor Typical Wiring (33ZCT55SPT) 1 2 3 4 5 6 RED(+) WHT(GND) BLK(-) CCN COM SEN SW1 SET BLK (T56) BRN (GND) BLU (SPT) SENSOR WIRING JUMPER TERMINALS AS SHOWN Cool Warm Fig. 18 or 20 gage. nominal length with 114 in. The sensor is mounted on the discharge line close to the discharge of the digital compressor. The following three types of SPT sensors are available: • Space temperature sensor (33ZCT55SPT) with timed override button (see Fig. The wire is suitable for distances of up to 500 ft. then an unshielded. If the set point adjustment (slidebar) is not required. SPACE TEMPERATURE SENSOR (SPT) — The space temperature sensors are used to measure the interior temperature of a building.90 3. Use a 20 gage wire to connect the sensor to the controller. two-conductor. 2.39 FOAM GASKET BRN (GND) BLU (SPT) SENSOR WIRING . To connect the space temperature sensor (Fig.5 ±. 24 — Space Temperature Sensor Typical Wiring (33ZCT56SPT) The sensor should be mounted approximately 5 ft from the floor in an area representing the average temperature in the space. ) 2. SPT SENSOR SEN SEN LVT 21 22 SET 23 Fig. if desired. 27 — Space Temperature Averaging 22 . Refer to Table 5 for acceptable wiring. 26): IMPORTANT: The cable selected for the RJ11 connector wiring MUST be identical to the CCN communication bus wire used for the entire network. strip ends of appropriate wires. 26 — CCN Communications Bus Wiring to Optimal Space Sensor RJ11 Connector RED BLK RED BLK J6 6 7 RED BLK RED BLK RED BLK SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 SPACE TEMPERATURE AVERAGING — 4 SENSOR APPLICATION J6 6 7 RED BLK RED BLK RED BLK BLK SENSOR 1 RED SENSOR 2 SENSOR 3 RED BLK RED BLK RED SENSOR 4 SENSOR 5 SENSOR 6 BLK LEGEND Factory Wiring Field Wiring SENSOR 7 RED BLK RED BLK SENSOR 8 SENSOR 9 SPACE TEMPERATURE AVERAGING — 9 SENSOR APPLICATION Fig. Insert and secure the black (–) wire to terminal 2 of the space temperature sensor. white (ground). Insert and secure the red (+) wire to terminal 5 of the space temperature sensor terminal block. Cut the CCN wire and strip ends of the red (+). and black (–) conductors. (If another wire color scheme is used. Insert and secure the white (ground) wire to terminal 4 of the space temperature sensor. NOTE: See Fig. 3. 5. 27 for space temperature averaging. Connect the other end of the communication bus cable to the remainder of the CCN communication bus. To wire the RJ11 connector into the CCN (Fig. 4. 25 — Typical SPT Wiring T-55 SPACE SENSOR 6 CCN+ TO CCN COMM 1 BUS (PLUG) AT UNIT CCN GND 5 4 3 CCN2 1 Fig. 1.Units on the CCN can be monitored from the space using the RJ11 connector provided with the space sensor. SETTING UP THE SYSTEM Machine Control Type (ConfigurationOPT2 C. the unit may not be able to run at full capacity.TYP = 1 (VAV-RAT) configuration refers to standard VAV operation. Thermostat Input — A two-stage thermostat can be used for constant volume applications to provide Y1 and Y2 cooling inputs. and capacity control features: • 4 to 20 mA temperature reset • 4 to 20 mA cooling set point • 4 to 20 mA desired capacity set point • 4 to 20 mA demand limit • Discrete inputs for 2-step demand limit (requires fieldsupplied dry contacts capable of handling a 24 vac. Energy Management Module (Fig. CEBD430351-0396-01C PWR J4 J3 STATUS LEN J5 J7 J6 TEST 2 RED LED . Control types are: • C. In addition to these methods of control.TYP) — The most important cooling control configuration is located under Configuration OPT2. Pressure Transducer Inputs — Each refrigerant cir- cuit is equipped with a suction and discharge pressure transducer. The configuration also determines the method by which compressors are staged. In some cases. the ComfortLink control offers the ability to run multiple stages of cooling for either a space temperature sensor or thermostat control by controlling the unit to either a low or high cool set point. the MBB has the capability to control the unit capacity by staging multiple scroll compressors and controlling the digital scroll compressor operation. 28) — The energy management module (EMM) is a factory-installed option (FIOP) or field-installed accessory used for the following types of temperature reset. The MBB will automatically reduce the capacity of a circuit as needed to maintain specified maximum/minimum operating pressures. See VAV Supply Air Temperature Reset and Demand Limit sections on pages 29 and 31 for further details. ComfortLink™ controls use half wave rectification. This configuration defines the method and control source responsible for selecting a cooling mode. 28 — Energy Management Module 23 CEPL130351-01 J1 J2 TEST 1 .5 to 667 psig. constant volume operation for 2 stages of cooling or VAV operation for multiple stages of cooling.TYP determines the selection of the type of cooling control as well as the method for selecting a cooling mode.STATUS GREEN LED LEN (LOCAL EQUIPMENT NETWORK) ADDRESS DIP SWITCH Fig.7 to 420 psig while the discharge transducers have a red body with a pressure range of 14. The suction pressure transducers have a yellow body with a pressure range of -6. The control also checks on various other operation parameters in the unit to make sure that safeties are not exceeded and the compressors are reliably operated. 50 mA load) • Discrete inputs for units with dual thermostats NOTE: A field-supplied 4 to 20 mA signal generator is required for use with the EMM. Several different types of switches can be utilized. demand limit.Fan Status Input — A proof-of-fan operation is recom- mended and needs to be field installed in the indoor unit. Control — When mechanical cooling is required. full wave bridge versus half wave rectification. CAUTION Care should be taken when interfacing with other manufacturer’s control systems due to possible power supply differences. These inputs connect to the MBB (main base board) and are used to monitor the status of the unit and to ensure the unit operates within the compressor envelope. A signal isolation device should be utilized if a full wave bridge signal generating device is used. The transducers are used to protect the compressor from operating at too low or too high of a pressure condition. The two different power supplies cannot be mixed. The control type ConfigurationOPT2C. The ComfortLink™ control system offers two basic control approaches to mechanical cooling. such as a differential pressure switch located across the indoor fan or auxiliary contacts on an indoor fan contactor. TYP = 3 (TSTAT-MULTI) configuration will force the MBB to monitor the thermostat inputs to make a determination of mode. and CSP2 = 55 F If space temperature equals 73 F (72+1) (Low Cool) cooling will begin and control set point equals 60 F (CSP1).OF Demand Level (–) Low Cool Off ITEM CSP1 CSP2 SPS. LC.TYP = 7 (% CAPACITY) configuration will force the MBB to monitor the input 4-20 cooling demand CL.TYP = 3 (TSTAT-MULTI) configuration will force the MBB to monitor the thermostat inputs to make a determination of control point (CTPT). CSP1 = 60 F.OF). OF L. 50% of the unit capacity will be energized and if Y2 is closed. LC. Unlike traditional 2-stage thermostat control.P RANGE 40-80 40-80 65-80 –1-2 0. LC.TYP = 9 (VAV-SETPOINT) configuration will force the MBB to operate as a VAV unit and control capacity to meet supply air temperature. HC. and LC. If space temperature falls below 72 F (73-2/2) (Low Cool minus LC. Refer to Table 6 and the following descriptions.TYP = 4 (TSTAT-2STG) configuration will force the MBB to monitor the thermostat inputs to make a determination of mode and capacity. 29): Given: SPS. 100% of the unit capacity will be energized. control point set point would equal 55 F (CSP2).5-20.TYP = 7 (% CAPACITY) configuration will force the MBB to monitor the 4-20 cooling demand CL.ON. Based on LC. The control will translate the input linearly with 4 ma equal to 40 F set point and 20 mA equal to 80 F set point. If space temperature is greater than 76 F (72+1+3 = 76) (High Cool).MA input value.TYP = 4 (TSTAT-2STG) configuration will force the MBB to monitor the thermostat inputs to make a determination of mode. the unit is allowed to use multiple stages of cooling control and perform VAV style operation. LC.P = 72 F. • C. (Required for 025-030 units with digital scroll option and 040-100 units with two-stage thermostat control.5 0.) • C.OF divided by 2.C.TYP = 5 (SPT-MULTI) configuration will force the MBB to monitor the thermostat inputs to determine mode and cooling set point as the unit is controlled by space temperature vs space temperature set point SPS. The control will be able to call out a low set point (CSP1) or high set point (CSP2) for 24 Lo Cool End 71 F A48-7701 Fig.ON = 3. The control will translate the input linearly with 4 mA equal to 40 F set point and 20 mA equal to 80 F set point. 29 — Space Temperature vs. This value will be translated into a desired leaving-air set point ranging from 40 to 80 F. The CSP set points can be automatically reset by . The MBB will attempt to control leaving temperature to the control point (CTPT) which equals CSP1 plus any reset which is being applied. The control will be able to call out a low set point or a high set point to maintain supply air temperature. NOTE: This is not a preferred method of control for units with greater than 2 stages of capacity • C. The control point is developed from the 4-20 cooling demand CL.C.MA input. the unit is allowed to use multiple stages of cooling control and perform VAV style operation.ON 73 F L. The set points are located in the set point area of the display SetPointsCOOL.5 1 supply air depending on space temperature vs space temperature set point.) Capacity Control Logic when Control is Controlling to Supply Temperature — The control system cycles compressors.OF = 2 F.TYP = 5 (SPT-MULTI) configuration will force the MBB to monitor a space temperature sensor to make a determination of mode. CSP1 should be greater than CSP2.ON Demand Level (+) High Cool On L. The control point transition from CSP2 to CSP1 occurs when space temperature is below LC.MA and translate this into desired % capacity for the unit.0 0.OF.OF is used to calculate the space temperature at which control point is raised based on space temperature vs space temperature set point (SPS. • C.5-2 UNITS F F F ^F ^F ^F DEFAULT 65 55 74 1.ON Demand Level Low Cool On H. The control will attempt to match the desired capacity insuring the unit operates the compressor within compressor safeties and timeguards.OF. Table 6 — Unit Capacity Control DESCRIPTION Cooling Set Point 1 Cooling Set Point 2 Space Temperature Cooling Set Point L.OF/2).OF to determine the leaving set point. 76 F H. • C. the unit is allowed to use multiple stages of cooling control and perform VAV style operation. control point transitions back to 60 F CSP1 if space continues to fall below 71 F (73-2) (Low Cool minus LC. (Requires the EMM option or accessory.ON.P. OF/2 Lo Cool Start Hi Cool Start • C. • C. The control will be able to call out a low set point or a high set point to maintain supply air temperature. HC. For example (see Fig.C. the control point transitions between CSP1 and CSP2.ON = 1.TYP = 1 (VAV-RAT) is a capacity control routine that controls compressor capacity to supply air temperature.) • C.C. Unit Capacity Control Based on Unit Type — The MBB uses several set points to control capacity depending on unit type. The SAT and RAT sensors are used by the main base board (MBB) to determine the temperature drop across the evaporator and are used in determining the optimum time to add or subtract capacity stages.P.P) plus LC. the unit is shut off. (Requires the EMM option or accessory.ON minus LC. LC. Space Temperature Set Point • C.ON 72 F Cooling Setpoint Hi Cool End 72 F L.C. The control uses SPS.• C.TYP = 9 (VAV-SETPOINT) configuration will force the MBB to monitor the 4-20 cooling demand CL. Unlike traditional 2-stage space temperature control.ON and HC. Unlike traditional 2-stage thermostat control. The control will vary the control point based on Y1 and Y2 inputs. • C. The 4 to 20 mA input will be translated into a desired control point ranging from 40 to 80 F. hot gas bypass and the digital compressor to maintain the supply temperature at or close to the control point of the unit.MA input and translate this into desired % capacity for the unit.ON are added to the space temperature set point to determine when cooling mode will begin and when CSP1 and CSP2 will be used for leaving set point.C. If Y1 input is closed. When Y1 is closed CSP1 will be used and when Y2 is closed CSP2 will be used as the supply air temperature set point.C. A2. A delay of 90 seconds occurs after each capacity step change.B2 83 A1.B2.A2.B3 100 A1. a capacity ratio is calculated using the 2 variables to determine whether or not to make any changes to the current stages of capacity.B1.A2.A2.B1 77 A1. The control determines the rate at which conditions are changing and calculates 2 variables based on these conditions.B1. This ratio value ranges from –100 to +100%.A2.A2. When unit is equiped with digital scroll option.A2.B2.B3 100 A1.050 CONTROL STEPS 1 2 1 2 1 2 3 1 2 3 4 1 2 3 4 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 6 1 2 3 4 5 6 LOADING SEQUENCE A % Displacement Compressor 50 A1 100 A1.B1.B1 48 A1.A2.B1.A2.B1 67 A1.B1 73 A1.B3 20 B1 40 A1.A3.A2. the processor control will add them.B3 100 A1.A2.B1 73 A1.B1.B1 57 A1.B1.A2 50 A1 100 A1.B1.B2.A2.B2 100 A1.B2 85 A1. Each time it runs.B1. 25 .B1 50 A1.B2.B2 100 A1. Table 7 — Compressor Size Information UNIT SIZE 38APS025 38APD025 38APS027 38APD027 38APS030 38APD030 38APS040 38APD040 38APS050 38APD050 38APD060 38APD070 38APD080 38APD090 38APD100 Compressor A1 11 11 13 13 15 15 13 10 15 12 13 15 15 13 15 Compressor A3 — — — — — — 13 — 15 — — — — 13 15 Compressor B1 — 11 — 13 — 15 — 9 — 13 15 11 15 15 15 CIRCUIT B (Nominal hp) Compressor B2 — — — — — — — 9 — 13 15 11 15 15 15 Compressor B3 — — — — — — — — — — — 11 15 15 15 Table 8 — Part Load Data Percent 38AP UNIT SIZE 38APS025-030 38APD025-030 38APS040.B2.B3 20 A1 40 A1.B1 77 A1.B1.B2 67 A1.A2.B3 LOADING SEQUENCE B % Displacement Compressor — — — — 50 B1 100 A1.A3.A2.A2.B1.B1.B2 82 A1.B1. CIRCUIT A (Nominal hp) Compressor A2 11 — 13 — 15 — 13 10 15 12 13 15 15 13 15 The capacity control algorithm runs every 30 seconds.B2 100 A1.B2 80 A1.B1 80 A1.A2.A3. the wear factor is used to determine which compressor to start next.A2.B2 85 A1.the return temperature. Refer to Table 8.B1.B1 — — — — — — 23 B1 50 A1.A2.B2 15 B1 42 A1.A3.B1.B2. If a circuit is to be stopped.A2. 2.B1.A2. As additional stages of compression are required.B2 27 B1 50 A1. sequence A is always used.A2.B3 18 B1 32 A1.B2 83 A1.B1.B2 100 A1. space.B3 17 B1 33 A1.A2.B1 60 A1.A2.B2 15 A1 42 A1.B1.A2.B2.B1.B1 100 A1. These capacity steps may vary due to different capacity staging sequences. The control has an automatic lead-lag feature built in which determines the wear factor (combination of starts and run hours) for each compressor.A2.A2.B2.B1.B1 100 A1.A2.B1.B2 100 A1.B2 66 A1.060 38APD070 38APD080 38APD090 38APD100 NOTES: 1.B2 23 A1 50 A1. Next. the control reads the entering and leaving temperatures.B1.B1.B1 51 A1.B1. the compressor with the lowest wear factor will be shut off first.B1.B1 50 A1.B2 100 A1. If the next stage of capacity is a compressor. The algorithm attempts to maintain the control point at the desired set point.A2.A2. B1 33 A1 67 A1.A3 27 A1 50 A1.A2.B1.A3.B3 15 A1 32 A1.B2.B1 60 A1. It can also be reset from an external 4 to 20 mA signal (requires energy management module factory-installed option or field-installed accessory).B1.A2.B3 17 A1 33 A1. or outdoor-air temperature reset features. If all compressors are off and less than 30 minutes has elapsed since the last compressor was turned off.B1 66 A1.A2 100 A1.B3 38APD040 38APD050.B1. the control starts (stops) a compressor when the ratio reaches +100% (-100%).B2.B1.B1 57 A1.B1 85 A1.B1.B2.B1.B2 100 A1.A3. See Table 7 for compressor size information and Table 8 for compressor loading sequence. MINUTES OFF TIME (ConfigurationOPT2 DELY) — This user-configurable time period is used by the control to determine how long unit operation is delayed after power is applied/restored to the unit. When set to other than 1.4. the control will modify the routine with a 1.6 OFM5.3 OFM3 OFM5 OFM3.4.6.2. The larger this value is set. If the unit is in a Cooling mode and configured for Ramp Loading. this time period is configured when multiple machines are located on a single site. Low Saturated Suction Protection — The control will try to prevent shutting a circuit down due to low saturated suction conditions by removing stages of capacity. LEAD/LAG DETERMINATION — This is a configurable choice and is factory set to be automatic for all units.4 OFM1 OFM1.1. The machine should start normally once the time limit has expired. Fan On Set Point (F.(6) OFM3 OFM1 OFM3. The circuit with the lowest sum is started first.(6) OFM3.3 FC1.4 Stage 1 FC1 OFM5 Stage 2 FC1. Changes to which circuit is the lead circuit and which is the lag are also made when total machine capacity is at 100% or when there is a change in the direction of capacity (increase or decrease) and each circuit’s capacity is equal.(2) Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6 FC4 FC1 FC4. Unit sizes 070 to 100 have one Motormaster V for each circuit and the control tries to maintain SCT at 100 F for the circuit.(6) 070 080 090.2 factor on adding the first stage to reduce cycling.4 Stage 1* FC2.2.MINUTES LEFT FOR START — This value is displayed only in the network display tables (using Service Tool.3 OFM5. The value can be changed to Circuit A or Circuit B leading as desired.3 Stage 4 FC1.0. Ramp Loading — The ramp loading control (Configuration SLCTCRMP) limits the rate of change of supply temperature. this gives the user the ability to prevent all the units from restarting at once after a power failure.0. Set at automatic.2 Stage 3 FC1.1.3. For example. the control will sum the current number of logged circuit starts and one-quarter of the current operating hours for each circuit. If the machine should be running and none of the above are true.2.2.1 OFM3. A value of zero for this variable does not mean that the unit should be running. For units with common fans. Table 9 shows the number of fan stages. A fan stage is decreased when the SCTs of both circuits are less than fan off set point for two minutes. MOTORMASTER® V OPTION — For low-ambient operation.2 FC4. When the highest SCT of both circuits is greater than fan on set point. The controller is given an ON command with the first stage of fan and adjusts fan speed.4. Fan Off Set Point (F. This can include being unoccupied. If the difference is greater than 4° F (2.(6) OFM3.(6) OFM1. CAPACITY CONTROL OVERRIDES — The following overrides will modify the normal operation of the routine. The MBB uses the saturated condensing temperature input from the discharge pressure transducer and outside air temperature sensor to control the fans. see below) may be in effect.2.4. The control calculates a temperature difference between the control point and supply temperature.3 OFM1.4 FC2.4. then an additional stage of fan will be added to the current fan stage. First Stage Override — If the current capacity stage is zero.4 FC4 FC2 FC4. this factor is applied to the capacity Load/Unload Factor. Table 9 — Fan Stages 38AP UNIT SIZE 025-030 040. contactors energized and the fans that are on during the fan stage. then all condenser fan stages will be energized.2 OFM1. and alarm or alert conditions present.4.2 Stage 3 FC1.3 FC4. Minimum Load Control — If equipped.2.OFF) equals Head Set Point OFF (–72 F).3 OFM3.6 OFM3. the minimum load control valve is energized only when one compressor on the circuit is running and the unit is unloading. ENABLE/OFF/REMOTE CONTACT switch in the OFF position.2. a minimum off time (DELY.GN) has a default value of 1.2 OFM1.4 OFM1. A fan stage is increased based on SCT. Figure 30 shows the location of each fan and compressor within the unit. CCN not allowing unit to start.2 Stage 2 FC1 OFM3 Stage 3 FC1.2 OFM1. the control does not allow any changes to the current stage of capacity.(2).2 Stage 1 FC1 OFM3 Stage 2 FC2 OFM1.3 Stage 1 FC1 OFM3 Stage 2 FC2 OFM1.3 FC4.(2). The range is from 1. Typically.(2).2° C) and the rate of change (°F or °C per minute) is more than the configured Cooling Ramp Loading value (CRMP). Unit sizes 070 to 100 have some fans that are common and some that are controlled individually. Deadband Multiplier — The user configurable deadband multiplier (ConfigurationSLCTZ.1. circuit A is always lead. no call for cooling due to no load.2. ComfortVIEW™ or ComfortWORKS® software) and represents the amount of time to elapse before the unit will start its initialization routine.2 OFM3 OFM3.1 FC4.ON) equals Head Set Point ON (115 F) except after a fan stage increase when Head Set Point is increased by Fan Stage Delta (10 F). Demand Limit in effect. Head Pressure Control — The main base board (MBB) controls the condenser fans to maintain the lowest condensing temperature possible.5. See Alerts section.0 to 4. This factor is also applied when the control is attempting to remove the last stage of capacity.3 FC2 FC2. the longer the control will delay between adding or removing stages of capacity.0. Unit sizes 025 to 060 have common fan control.4 FC4 FC3. NOTE: If the unit has digital scroll or hot gas bypass.3 FC2. the first stage of fans is equipped with the Motormaster V head pressure controller option or accessory.3. This value can be zero without the machine running in many situations.2.6 Fan Stage — — CIRCUIT B FAN STAGES Contactor Energized — — Fans Operating — — 060 — Stage 1* Stage 2 Stage 3 Stage 1 Stage 2 Stage 3 Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6 — FC1.5 OFM3.050 CIRCUIT A STAGES/COMMON FAN STAGES Fan Stage Contactor Energized Fans Operating Stage 1 FC1 OFM1 Stage 2 FC1.3 — OFM3. the control will control the Head Pressure Setpoint (–10 F) and the highest SCT to try to maintain it at 100 F. Slow Change Override — This control prevents the capacity stages from being changed when the supply temperature is close to the set point (within an adjustable deadband) and moving toward the set point. the control makes 2 comparisons before deciding to change stages of capacity. 26 . and thus the highest unit efficiency. If OAT is greater than 70 F before a circuit is starting.2.100 * Fan Stage 1 on unit size 070 is used only when ambient temperature is less than 32 F. 050 Sizes 025-030 Fig. 050 Sizes 060.Outdoor Fan Layout – Top View OFM1 CONTROL BOX CONTROL BOX OFM1 OFM3 OFM2 CONTROL BOX OFM1 OFM3 OFM2 OFM2 OFM4 Sizes 025-030 Sizes 040. 070 CONTROL BOX OFM3 OFM2 OFM6 CONTROL BOX OFM1 OFM5 OFM1 OFM3 OFM5 OFM2 OFM4 OFM6 Size 080 Sizes 090. 080 A1 B1 B1 B2 Sizes 040-060 A2 A1 Sizes 025-030 CONTROL BOX B1 B2 B3 A3 A2 A1 Sizes 090. 30 — Compressor and Fan Location 27 . 100 Compressor Layout Single Circuit – Top View A1 CONTROL BOX CONTROL BOX A1 A2 A2 A3 Sizes 040. 100 Compressor Layout Dual Circuit – Top View A1 A2 CONTROL BOX CONTROL BOX CONTROL BOX B1 B2 B3 Sizes 070. The TEST sub-mode value must be changed back to OFF before the unit can be switched to Enable or Remote contact for normal operation. No additional stages of capacity will be added. To use the Service Test mode. CCN SCHEDULE (CTRL=3) — An external CCN device controls the On/Off state of the machine. The pull-down limit can be modified. All safeties are monitored during this test and they will turn a compressor.2 to 2° F (0. The Enable/Off/ Remote Contact must be in the Enable or Remote Contact position. Any other mode or sub-mode can be accessed. The control mode (Operating ModesMODE) will be 1 when the switch is Off. Unit capacity may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature. preventing the compressor from starting. LOW TEMPERATURE COOLING (MD17) — Unit is in Cooling mode and the rate of change of the supply fluid is negative and decreasing faster than -0. unit is using temperature reset to adjust supply fluid set point upward and is currently controlling to the modified set point. Press ENTER twice so that OFF flashes. When testing the digital output the display can be changed from 1 to 15 by using either the up or down arrow. These discrete outputs are then turned off if there is no keypad activity for 10 minutes. This may be an indication of oversized application. LOW SOUND MODE (MD25) — Not applicable. HIGH SCT CIRCUIT A (MD21) — Unit is in a Cooling mode and the saturated condensing temperature (SCT) is greater than the calculated maximum limit. The schedule number must be set to 1 for local schedule. Enter the password if required. The control mode (Operating ModesMODE) will be 1 (OFF LOCAL) when the switch is Off and will be 5 (ON LOCAL) when in the Enable position or Remote Contact position with external contacts closed. Use the display keys and Service Test Mode and Sub-Mode Directory table in Appendix A to enter the mode and display TEST. With the control method set to 0. SLOW CHANGE OVERRIDE (MD09) — Slow change override is in effect. This is a 1 to 4 hour temporary override of the programmed schedule. The schedule number can be set anywhere from 65 to 99 for operation under a CCN global schedule. Control will automatically unload the unit if necessary. In this mode. however control continues to operate compressor to ensure proper oil return. Similarly. if desired. Press ESCAPE and the down key to enter the OUTS.1 to 1° C) per minute. This CCN device forces the variable 'CHIL_S_S' between Start/Stop to control the unit. MINIMUM COMP ON TIME (MD23) — Cooling load may be satisfied. simply switching the Enable/Off/Remote Contact switch to the Enable or Remote Contact position (external contacts closed) will put the unit in an occupied state. Use either arrow key to change the TEST value to the ON position and press ENTER . liquid line solenoid valve (if installed). the Enable/Off/Remote Contact switch must be in the OFF position. The supply fluid temperature is close to and moving towards the control point. Compressors will stay on until they are turned off by the operator. Test the compressor and minimum load valve solenoid (if installed) outputs in a similar manner. DEMAND LIMITED (MD15) — Demand limit is in effect. Unit capacity may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature. Demand limit can be controlled by switch inputs or a 4 to 20 mA signal. the control mode will be 7 when the time of day is during an occupied period. minimum load valve solenoid (if installed). TIME GUARD ACTIVE (MDTG) — Compressor time guard is active. This indicates that the capacity of the unit is being limited by 28 the configuration of the control method (ConfigurationOPT2CTRL). The Service Test function should be used to verify proper operation of condenser fan(s). the number represents the cycle rate out of a 15 second duty cycle that the output will be energized. These schedules are identical. the unit may not be able to produce the desired supply fluid temperature. Error between supply fluid and control point exceeds fixed amount. The control mode (Operating ModesMODE) will be 1 when the switch is Off. Error between supply fluid and control point exceeds fixed amount. liquid line solenoid and alarm relay by changing the item values from OFF to ON. space temperature. HIGH SCT CIRCUIT B (MD22) — Unit is in a Cooling mode and the saturated condensing temperature (SCT) is greater than the calculated maximum limit. Because of this limitation. Override expires after each use. In this mode. TEMPERATURE RESET (MD14) — Temperature reset is in effect. The minimum load valve solenoids will be turned off if there is no keypad activity for 10 minutes. Operating Modes RAMP LOAD LIMITED (MD05) — Ramp load (pulldown) limiting is in effect. COMPA or COMPB sub-mode. forcing unit to Occupied mode. Control will automatically load the unit if necessary to better match the increasing load. to any rate from 0. The control mode will be 2 when the Enable/Off/Remote Contact switch input is On and the Operation of Machine Based on Control Method — Machine On/Off control is determined by . or changed during the TEST mode. circuit or the machine off if required. The control mode will be 3 when the Enable/Off/Remote Contact switch input is On and the time of day is during an unoccupied period. The Service Test mode is now enabled. low fluid flow rate or low loop volume. No additional stages of capacity will be added. and remote alarm relay. Override can be implemented with unit under Local (Enable) or CCN (Carrier Comfort Network®) control. outdoor-air-temperature. See Cooling Ramp Loading (ConfigurationSLCTCRMP). demand limit control option. The set point can be modified based on return fluid. The Service Test mode will remain enabled for as long as there is one or more compressors running. viewed.5° F per minute. TIMED OVERRIDE IN EFFECT (MD06) — Timed override is in effect. The STAT item (Run/StatusVIEW) will display "0" as long as the Service mode is enabled. the output will be energized 7 seconds out of every 15 seconds. MINIMUM OFF TIME ACTIVE (MD10) — Unit is being held off by Minutes Off Time (Configuration OPT2DELY). Two other control methods are available for Machine On/ Off control: OCCUPANCY SCHEDULE (CTRL=2) — The main base board will use the operating schedules as defined under the Time Clock mode in the scrolling marquee display. or 4 to 20 mA signal. Test the condenser fans. compressors. If the cycle is set for 7. the rate at which supply fluid temperature is dropped is limited to a predetermined value to prevent compressor overloading.Service Test — Both main power and control circuit power must be on. Place the Enable/Off/Remote Contact switch in the ENABLE position. HIGH TEMPERATURE COOLING (MD18) — Unit is in Cooling mode and the rate of change of the supply fluid is positive and increasing. This example provides 5 F (2. and subtract the active set point (SETP) from the control point (CTPT) to determine the degrees reset.O. The space temperature offset range (SP.O. See Table 10 for an example of 4 to 20 mA reset.3 12.2 C) space temperature and 6 F (3.1 23. the efficiency of the machine would increase. The variable RM. the unit will maintain a constant leaving temperature approximately equal to the cooling set point. RM. The control will interpolate between 0 degrees reset at 4 mA and the value entered for MA.' Similarly. Under normal operation. Return air is a measure of the building load.2 10.DG. The variable RM. RT. sub-mode VIEW.6 C) T. To use Return reset.1 21.6 14.F should 29 LEGEND SAT — Supply Air Temperature Fig. items CRST. T56.S SP.O.8 C) outdoor-air temperature.3 12. Usually the unit size and supply air temperature set point are selected based on a full-load condition. the air temperature set point may be colder than required. An accessory sensor must be used for SPT reset. or T59 sensor can be used. in effect. In the Configuration mode under the sub-mode RSET.S) set to enable [ConfigurationOPT1]. The outdoor air reset example provides 0° F (0° C) reset to the active set point at 85 F (29.6 14. To use Outdoor Air or Space Temperature reset.4 13.DG must be properly set.F and RT. At part load.4 13.0 12.6 21. 15.8 23.O.2 11.R) value is either added or subtracted from the space temperature cool set point.' Set Point Adjustment CV SET POINT ADJUSTMENT — If the unit is configured for control type SPT MULTI (C. The variable RM. which is the amount of reset desired with a 20 mA signal.F should be set to the temperature that maximum reset is to occur. (SP.DG must be properly set. To use 4 to 20 mA reset. either a T55. one variable must be configured MA. Figures 31 and 32 are examples of outdoor air and space temperature reset. See Fig 32.4 20.TYP =5) and the Space Temperature Offset Sensor is enabled.2 22.F and RT.8 15. The variable RM.NO. the control mode will be 6 when the CHIL_S_S variable is 'Start. the return air temperature will change in proportion to the load.DG should be set to the maximum amount of reset desired. Return temperature reset allows for the leaving temperature set point to be reset upward as a function of the return air temperature or.1 60 58 MAXIMUM RESET CHANGE IN RESET TEMPERATURE SA T 56 54 CHILLED SET POINT CHANGE IN SAT SET POINT RESET SET POINT 52 40 4. 32 — Space Temperature Reset . Space temperature offset corresponds to a slider on a T56 sensor that allows the occupant to adjust the space temperature by a configured range during an occupied period. The methods are return temperature.0 20. RM.NO.1 C) T and 0° F (0° C) reset at 10 F (5. The space temperature reset example provides 0° F (0° C) reset to the active set point at 72 F (22.7 22. The energy management module (EMM) must be used for temperature reset using a 4 to 20 mA signal.3 18.R equals 5 then the cooling set point can be adjusted from 68 to 77 F by adjusting the T56 slider.NO should be set to the air temperature difference ( T) where no reset should occur. The return temperature reset is in effect an average building load reset method.8 16.CHIL_S_S variable is 'Stop.7 SAT TEMPERATURE (C) 64 62 SAT TEMPERATURE (F) 15. The variable RT. space temperature (SPT).R EXPANSION Space Temp Offset Sensor Space Temp Offset Range RANGE Enable/ Disable 1-10 UNITS CCN POINT SPTOSENS SPTO_RNG be set to the temperature difference where the maximum reset should occur.4 45 50 55 60 65 70 75 80 85 90 OUTSIDE TEMPERATURE (F) 7.DG at 20 mA.8 C) active set point reset at 2 F (1.P equals 72 F and SP.4 32. Connection of control devices with different power supplies may result in permanent equipment damage.4 C) outdoor-air temperature and 6 F (3.NO should be set to the temperature that no reset should occur.2 11. 31 — Outdoor-Air Temperature Reset 17. See Fig 31. To verify that reset is functioning correctly proceed to Run Status mode.2 OUTSIDE TEMPERATURE (C) CAUTION Care should be taken when interfacing with other control systems due to possible power supply differences.3 21. the building load. 17. outside air temperature (OAT) and from an externally powered 4 to 20 mA signal. Example SPS.3 C) reset at 55 F (12. If the leaving air temperature was allowed to increase at part load. See Table 12.0 C) space temperature. As the unit load varies. RT. four variables must be configured.9 19.3 C) reset at 68 F (20.7 29. four variables must be configured. The variable RT. items CRST. ComfortLink™ controls incorporate power supplies with half wave rectification. full wave bridge versus half wave rectification.9 26. See Table 11.O.8 16. ITEM SP. The variable CRST should be configured for the type of reset desired.3 SPACE TEMPERATURE (C) LEGEND SAT — Supply Air Temperature Fig. A signal isolation device should be utilized if the signal generator incorporates a full wave bridge rectifier.7 SAT TEMPERATURE (C) 64 62 SAT TEMPERATURE (F) VAV SUPPLY AIR TEMPERATURE RESET — The control system is capable of changing the controlling set point based on several different methods. In the Configuration mode under the sub-mode RSET.6 18.DG should be set to the maximum amount of reset desired.1 60 58 MAXIMUM RESET CHANGE IN RESET TEMPERATURE SA T 56 54 CHILLED SET POINT RESET SET POINT CHANGE IN SAT SET POINT 52 65 66 67 68 69 70 71 72 73 74 SPACE TEMPERATURE (F) 18. 7 C) RSET ENTER CRST* 3 RT.NO* RT.F 55 °F 68 °F RM.7 C) Default: 0.0° F (-17. Table 11 — Configuring Outdoor Air and Space Temperature Reset MODE (RED LED) KEYPAD ENTRY ENTER SUBMODE DISP UNIT OPT1 OPT2 M.DEGREES RESET 0 = No Reset 1 = 4 to 20 mA Input (EMM required) 2 = Outdoor-Air Temperature 3 = Return Air Temperature 4 = Space Temperature Default: 10° F (5.DG NOTE: The example above shows how to configure the unit for 4 to 20 mA reset.FULL RESET TEMP REMOTE .7 to –12.7 to 51.0 mA.0 F (2.7 C) CRST 1 5.7 to 51. 10° F 0° F 5° F 30 . 15 °F 6 °F Table 12 — Configuring Return Temperature Reset MODE (RED LED) KEYPAD SUB-MODE KEYPAD ENTRY ENTRY ENTER ITEM DISPLAY ITEM EXPANSION COMMENT DISP UNIT CNN OPT1 OPT2 CONFIGURATION M.NO RESET TEMP REMOTE .FULL RESET TEMP RETURN .4 to -1.DEGREES RESET 2 = Outdoor-Air Temperature 4 = Space Temperature (Connect to LTV-21.DG *1 item skipped in this example.7 to 16.2 C) Default: 0° F (0° C) Range: –30 to 30°F (–16.0 F (51.7 to 16.7 C) Range: 0° to125 F (-17.7 C) Default: 0° F (0° C) Range: –30 to 30 F (–34.7 C) Default: 0° F (–17.MST KEYPAD ENTRY DISPLAY ITEM Outdoor Air Space ITEM EXPANSION COMMENT CONFIGURATION RSET ENTER CRST 2 4 COOLING RESET TYPE REMOTE .Table 10 — 4 to 20 mA Reset SUB-MODE RSET ENTER KEYPAD ENTRY ITEM DISPLAY ITEM EXPANSION COOLING RESET TYPE 4-20 mA DEGREES RESET COMMENT 0 = no reset 1 = 4 to 20 mA Input 2 = Outdoor Air Temp 3 = Return Fluid 4 = Space Temperature Default: 0° F (0° C) Reset at 20 mA Range: –30 to 30 F (–16. No reset will occur at 4.7 to 16.22) Default: 125.0 mA input.NO* 85 °F 72 °F RM. and a 5.DG *4 items skipped in this example.7 C) Range: 0° to 125 F (-17.MST COOLING RESET TYPE RETURN .8 C) MA.8° C) Range: 0° to 10 F T (-17.6° C) Range: 0° to 30 F T (-17. An energy management module is required.NO RESET TEMP RETURN .0 F reset will occur at 20.1 °C) RM.F RT. select the type of demand limiting to use. For Demand Limit by 2-stage switch control.MST RSET KEYPAD ENTRY ITEM DISPLAY ITEM EXPANSION COMMENT ENTER CRST X Cooling Reset Type Default: 0 0 = None 1 = Switch 2 = 4 to 20 mA Input 3 = CCN Loadshed Default: 100% Range: 0 to 100 Default: 0 Range: 0 to 99 Default: 0% Range: 0 to 60% Default: 60 min. The unit will not exceed the percentage of capacity entered as Demand Limit Switch 1 set point. due to possible power supply differences. Failure to comply could result in possible equipment damage. Then configure the 2 Demand Limit Switch points (ConfigurationRSETDLS1 and DLS2) to the desired capacity limit. The third type uses the CCN loadshed module and has the ability to limit the current operating capacity to maximum and further reduce the capacity if required. Range: 0 to 120 min. Table 13 — Configuring Demand Limit MODE CONFIGURATION KEYPAD ENTRY ENTER SUB-MODE DISP UNIT CCN OPT1 OPT2 M. If the demand limit percentage does not match unit staging. 33. set the Demand Limit Select (ConfigurationRSETDMDC) to 1. The second type is by 4 to 20 mA signal input which will reduce the maximum capacity linearly between 100% at a 4 mA input signal (no reduction) down to the userconfigurable level at a 20 mA input signal. Capacity steps are controlled by 2 relay switch inputs field wired to low voltage terminal (LVT) strip terminal 3-6. The control will reduce allowable capacity to this level for the 20 mA signal. The demand limit stage that is set to the lowest demand takes priority if both demand limit inputs are closed. EXTERNALLY POWERED DEMAND LIMIT (4 to 20 mA Controlled) — To configure Demand Limit for 4 to 20 mA control. ComfortLink™ controls use half wave rectification. The first type is through 2-stage switch control. Then configure the Demand Limit set points based on the type selected. the unit will limit capacity to the closest capacity stage. full wave bridge versus half wave rectification. Then configure the Demand Limit at 20 mA (ConfigurationRSETDM20) to the maximum loadshed value desired. To disable demand limit. The two different power supplies cannot be mixed.Demand Limit — Demand Limit is a feature that allows the unit capacity to be limited during periods of peak energy usage. See Table 13. CAUTION Care should be taken when interfacing with other manufacturer’s control systems. Closing contacts on the second demand limit switch prevents the unit from exceeding the capacity entered as Demand Limit Switch 2 set point. Connect the output from an externally powered 4 to 20 mA signal to terminal block LVT strip terminals 7 and 8. To use Demand Limit. See Table 13. See Table 13 and Fig. DEMAND LIMIT (2-Stage Switch Controlled) — To configure Demand Limit for 2-stage switch control. which will reduce the maximum capacity to 2 user-configurable percentages. There are 3 types of demand limiting that can be configured. closing the first stage demand limit contact will put the unit on the first demand limit level. NOTE: The 2-stage switch control and 4 to 20 mA input signal types of demand limiting require the energy management module (EMM). configure the DMDC to 0. XXX % XXX XXX% XXX MIN XXX % XXX % Demand Limit at 20 mA Loadshed Group Number Loadshed Demand Delta Maximum Loadshed Time Demand Limit Switch 1 Demand Limit Switch 2 31 . Refer to the unit wiring diagram for these connections. Refer to the unit wiring diagram for these connections to the optional/accessory energy management module and terminal block. Default: 80% Range: 0 to 100% Default: 50% Range: 0 to 100% DMDC* X Demand Limit Select DM20 SHNM SHDL SHTM DLS1 DLS2 *Seven items skipped in this example. A signal isolation device should be utilized if a full wave bridge signal generating device is used. set the Demand Limit Select (ConfigurationRSETDMDC) to 2. the compressor operates like a standard scroll and delivers full capacity and mass flow. DIGITAL SCROLL OPERATION — A digital scroll operates in two stages . As the compressor transitions from a loaded to unloaded state. which indicates the maximum unloading for the digital compressor is 50%. 33 — 4 to 20 mA Demand Limiting — Demand Limit Select (DMDC = 2) DEMAND LIMIT (CCN Loadshed Controlled) — To configure Demand Limit for CCN Loadshed control. the discharge and suction pressures will fluctuate and the compressor sound will change. This is done to optimize efficiency of the system. ALLOWABLE LOAD (%) 80 60 40 100% CAPACITY AT 4mA 75% CAPACITY AT 12 mA 20 50% CAPACITY AT 12 mA 0 DM20 = 0 20 DM20 = 50 0 2 4 6 8 10 12 14 16 18 DEMAND LIMIT SIGNAL – 4 . the compressor always rotates with constant speed. The energy management module (EMM) must be used for cooling set point control using a 4 to 20 mA signal. Capacity is the time averaged summation of loaded and unloaded states. Loadshed Demand Delta (ConfigurationRSETSHDL). Connect the signal to LVT strip terminal 10. The control will disable the Redline/Loadshed command if no Cancel command has been received within the configured maximum loadshed time limit. If the DUS is energized for 7. the ComfortLink controls will reduce the current stages by the value entered for Loadshed Demand delta. set the Demand Limit Select (ConfigurationRSETDMDC) to 3. Digital Scroll Option — The 38AP units have a factory-installed option for a digital scroll compressor which provides additional stages of unloading for the unit.TYP 4 Unit Options 2 Controls 1 = VAV 3 = Tstat Multi 4 = Tstat 2 Stage 5 = SPT Multi 7 = PCT CAP 8 = Dual Stat 9 = VAV Set Point ENTER C. When a digital compressor is installed. DIGITAL COMPRESSOR CONFIGURATION — When a digital compressor is installed. the configuration parameter ConfigurationUnitA1.TYP = 9). During the loaded state. compressor is always installed in the A1 compressor location. and its range is continuous from 10% to 100%. When the Redline command is received. Regardless of capacity. Should the loadshed control send a Loadshed command. the compressor will be operating at approximately 25% of its capacity. The maximum loadshed time is the maximum length of time that a loadshed condition is allowed to exist. Once configured. during the unloaded state.TY is configured to YES. See Table 14 for instructions to enable the function.8 (+. the unit type must be configured for control type VAV set point (ConfigurationOPT2C. the control will translate the input linearly with 4 mA equal to 40 F set point and 20 mA equal to 80 F set point.100 50% CAPACITY AT 20 mA MAX. However.TYP 9 Machine Control Type 32 . Cooling Set Point (4 to 20 mA) — A field supplied and generated. To use the 4 to 20 mA set point. the current stage of capacity is set to the maximum stages available. There is also a maximum unload time configuration. See Table 13. The ComfortLink controller controls and integrates the operation of the DUS into the compressor staging routine to maintain temperature control.5 seconds. Then configure the Loadshed Group Number (ConfigurationRSETSHNM).the "loaded state" when the solenoid valve is normally closed and the "unloaded state" when the solenoid valve is open. The Loadshed Group number is established by the CCN system designer. and Maximum Loadshed Time (ConfigurationRSETSHTM).-).T. If the DUS is energized for 11 seconds. The digital MODE (RED LED) CONFIGURATION KEYPAD ENTRY ENTER Table 14 — Configuration VAV 4 to 20 mA Set Point SUB-MODE DISP UNIT CCN OPT1 OPT2 ENTER KEYPAD ENTRY ITEM DISPLAY ITEM EXPANSION COMMENT C. the compressor will be operating at 50% capacity. When a digital compressor is installed. a digital unloader solenoid (DUS) is used on the digital compressor. an additional discharge gas thermistor (DTT) is installed along with the AUX board for control of the DUS.20 mA INPUT Fig. externally powered 4 to 20 mA signal can be used to provide the leaving temperature set point. Figure 34 shows how the 4 to 20 mA signal is linearly calculated. The ComfortLink controls will respond to a Redline command from the Loadshed control. Configuration UnitMAX. The capacity of the system is varied by varying the time the compressor operates in an unloaded and loaded state during a 15-second period. there is no capacity and no mass flow through the compressor. that is set to 7 seconds. charge each circuit with the amount of Puron® refrigerant (R-410A) listed in Table 15.1 -6.1 SUPPLY SETPOINT 15. review Start-Up Checklist at the back of this publication. Using the liquid charging method and charging by weight procedure. even if any safety device is open. to ensure that no moisture is present in the system. isolate the vacuum pump from the system. application requirements. See Add Oil section on page 47. system information. This will ensure a dry system. For best results. 7. 2. Crankcase heaters must be firmly attached to compressors. Equipment damage could result if heaters are not energized for at least 24 hours prior to compressor start-up. CAUTION Crankcase heaters on all units are wired into the control circuit. To energize the crankcase heaters. it is recommended that a vacuum of at least 500 microns (0. Check rotation of fans during first start-up check.7 -12. Oil should be visible in the compressor sight glasses. Module 5.2 -17.4 -1. Recovery. The checklist assures proper start-up of a unit and provides a record of unit condition. so they are always operable as long as the main power supply disconnect is on (closed). No oil should be removed unless the crankcase heater has been energized for at least 24 hours. and Reclamation for charging procedures. for Carrier-approved oils. leak test the unit and then pull a deep dehydration vacuum. Once all of the piping connections are complete. Compressor heaters must be on for 24 hours prior to the start-up of any compressor. Do not attempt to start the air-conditioning system until the following checks have been completed. It is required that liquid line filter driers be installed between the condenser(s) and the expansion devices to capture any foreign debris and provide additional moisture removal capacity. Fan motors are 3-phase. Afterwards. EVACUATION AND DEHYDRATION — Because the 38AP systems use polyolester (POE) oil. 6. including the air-handling equipment. An acceptable oil level in the compressor is from 1/8 to 3/8 of sight glass. System Check 1. perform a standing vacuum-rise test.2 26. 4. Check all system components. 33 With the unit in deep vacuum (500 microns or less). Compressor crankcase heaters must be on for 24 hours before start-up. Adjust the oil level as required. then continue the dehydration process. and operation at initial start-up. close the field disconnect and turn on the fan circuit breakers. be sure all are properly installed and wired correctly. Connect the vacuum pump to the charging valve in the suction line and to the liquid line service valve. The checklist assures proper start-up of a unit and provides a record of unit condition.(C) 32.6 10. and operation at initial start-up. Leave the compressor circuit breakers off/open. Minimizing the exposure time of the oil to the atmosphere will minimize the amount of moisture that needs to be removed during evacuation. Charging.0 4. system information. START-UP IMPORTANT: Before beginning Pre-Start-Up or Start-Up. Electrical power source must agree with unit nameplate. If the unit has field-installed accessories. application requirements. which can absorb moisture. Open liquid line and suction line service valves.7 21. By following these evacuation and dehydration procedures. Maintain a vacuum on the system until the standing vacuum requirement is met. Refer to unit wiring diagrams.5 mm Hg) be obtained. 5. The crankcase heaters are now energized. Consult manufacturer's instructions. review Start-Up Checklist at the back of this publication. 34 — 4 to 20 mA Supply Set Point PRE-START-UP IMPORTANT: Before beginning Pre-Start-Up or Start-Up. Observe the rate-of-rise of the vacuum in the system. and must be on for 24 hours prior to start-up. 3. Preliminary Charge — Refer to GTAC II (General Training Air Conditioning). Check tightness of all electrical connections. the amount of moisture present in the system will be minimized. it is important to minimize the amount of time that the system interior is left exposed to the atmosphere. .8 (F) 90 80 70 60 50 40 30 20 10 0 0 5 10 SETPOINT SIGNAL – 4-20 mA INPUT 15 20 Fig. If the vacuum rises by more than 50 microns in a 30-minute time period. Recycling. add charge. Charge vapor into compressor low-side service port located on the suction service valve.7) 46 (20. Failure to comply could result in personal injury or equipment damage. Add charge until the pressure and temperature conditions of the charging chart curve are met. If charging at low outdoor ambient.6) 29 (12.45 kg per 3 m) 8 7/ in.Table 15 — Preliminary Puron Refrigerant (R-410A) Charge.7) CIRCUIT B — 12 (5. 57 and 58.0 lb per 10 linear ft (0.6 lb per 10 linear ft (0. making sure a Schrader depressor is used. 3556. adjust the refrigerant charge in accordance with the unit charging charts in Fig. as needed. Measure pressure at the liquid line service valve. See Fig.6 m).6 mm) liquid line — 3. Do not overcharge.7 mm) liquid line — 0. Ensure that all fans are on 4 and all compressors are running when using charging charts. Using cooling charging charts provided. As conditions get close to the point on the chart. Also.0) — 14 (6. add or remove charge in 1/ lb increments until complete.6 m) of interconnecting liquid line piping between indoor and outdoor units.9) 27 (12.6) 13 (6. (15. Also ensure maximum allowable liquid lift has not been exceeded.59 kg per 3 m) Adjust Refrigerant Charge CAUTION Never charge liquid into the low pressure side of system. refrigerant charge is reduced significantly. measure liquid line temperature as close to the liquid service valve as possible.7) CAUTION Charging procedures for MCHX (microchannel heat exchanger) units require very accurate measurement techniques. be sure indoor fan system is operating. add or remove charge in 1/4 lb increments until complete.9 mm) liquid line — 1.7) 46 (20. For liquid line piping longer than 25 ft (7.9) 14 (6.9) 33 (15.2 mm) liquid line — 2. (12. With all fans operating and all compressors on the circuit being serviced operating at full capacity. (28.7) 46 (20. Ensure all fans and compressors on the circuit being serviced are operating. If the sight glass is cloudy.0 lb per 10 linear ft (0.9) 39 (17. Replace or repair. add or remove refrigerant until conditions of the chart are met.1) 46 (20.6) — 13 (6.5) — 17 (7. reduce the charge until the conditions match the curve. lb (kg) 38AP UNIT SIZE 38APS025 38APD025 38APS027 38APD027 38APS030 38APD030 38APS040 38APD040 38APS050 38APD050 38APD060 38APD070 38APD080 38APD090 38APD100 CIRCUIT A 24 (10. Using cooling charging charts provided.0) 29 (12. If the sight glass is cloudy. Due to the compact design of microchannel heat exchangers. Charge should be added in small increments.5) 39 (17. the condenser coil can be partially blocked in order to increase head pressure. 34 .6) 26 (11.5) 48 (21.5) 22 (9. Failure to comply may result in equipment damage. add or remove refrigerant until conditions of the chart are met.1) 29 (12.9) 29 (12. Charge should be added in small increments. 2. During charging or removal of refrigeration. If liquid pressure and temperature point fall below curve. As conditions get close to the point on the chart. As a result. check refrigerant charge again.9) 12 (5. Preliminary charge is based on 25 ft (7. Check for a plugged filter drier or partially open solenoid valve.27 kg per 3 m) 2 5/ in.5 lb per 10 linear ft (1. a restriction could exist in the liquid line. charging procedures for MCHX units require very accurate measurement techniques. use the following information: 1/ in. NOTES: 1. Ensure that all fans are on and all compressors are running when using charging charts.8) — 26 (11. (22.91 kg per 3 m) 8 11/8 in. If liquid pressure and temperature point fall above curve.7) 21 (9. As conditions get close to the point on the chart. As conditions get close to the point on the chart. Fig. add or remove charge in 1/4 lb increments until complete. 50/60 Hz 35 .Circuit A or B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) QUID 50 SST 40 SST LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) QUID 50 120 ADD CHARGE IF ABOVE CURVE 30 SST 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 a38-7169 LEGEND SST — Saturated Suction Temperature 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. add or remove charge in 1/4 lb increments until complete. 50/60 Hz Single Circuit 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 50 120 ADD CHARGE IF ABOVE CURVE 30 SST 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 a38-7170 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Fig. 36 — Charging Chart — 38APS025. Charge should be added in small increments. Charge should be added in small increments. Ensure that all fans are on and all compressors are running when using charging charts. Using cooling charging charts provided. add or remove refrigerant until conditions of the chart are met. 35 — Charging Chart — 38APD025. Ensure that all fans are on and all compressors are running when using charging charts. add or remove refrigerant until conditions of the chart are met. Using cooling charging charts provided. Using cooling charging charts provided. Charge should be added in small increments. 50/60 Hz Single Circuit 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 50 120 ADD CHARGE IF ABOVE CURVE 30 SST 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 a38-7172 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 LEGEND SST — Saturated Suction Temperature 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. 38 — Charging Chart — 38APS027. add or remove charge in 1/4 lb increments until complete. 50/60 Hz 36 . Fig. Ensure that all fans are on and all compressors are running when using charging charts. Using cooling charging charts provided. As conditions get close to the point on the chart. Fig. Ensure that all fans are on and all compressors are running when using charging charts. add or remove refrigerant until conditions of the chart are met. 37 — Charging Chart — 38APD027. add or remove charge in 1/4 lb increments until complete. As conditions get close to the point on the chart. add or remove refrigerant until conditions of the chart are met. Charge should be added in small increments.Circuit A or B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 50 120 ADD CHARGE IF ABOVE CURVE 30 SST 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 a38-7171 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 LEGEND SST — Saturated Suction Temperature 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Ensure that all fans are on and all compressors are running when using charging charts. add or remove refrigerant until conditions of the chart are met. Ensure that all fans are on and all compressors are running when using charging charts.Circuit A or B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 50 120 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 200 250 a38-7173 LEGEND SST — Saturated Suction Temperature 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. add or remove charge in 1/4 lb increments until complete. Fig. As conditions get close to the point on the chart. As conditions get close to the point on the chart. add or remove refrigerant until conditions of the chart are met. 50/60 Hz Single Circuit 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 50 120 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 a38-7174 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Using cooling charging charts provided. 50/60 Hz 37 . Fig. Charge should be added in small increments. Charge should be added in small increments. add or remove charge in 1/4 lb increments until complete. 40 — Charging Chart — 38APS030. Using cooling charging charts provided. 39 — Charging Chart — 38APD030. add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts. Fig.Circuit A 130 50 SST LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 ADD CHARGE IF ABOVE CURVE 40 SST 30 SST 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 200 250 a38-7175 1500 LEGEND SST — Saturated Suction Temperature 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Ensure that all fans are on and all compressors are running when using charging charts. As conditions get close to the point on the chart. add or remove refrigerant until conditions of the chart are met. Charge should be added in small increments. As conditions get close to the point on the chart. add or remove charge in 1/4 lb increments until complete. 50/60 Hz 38 . 41 — Charging Chart — 38APD040 — Circuit A. Charge should be added in small increments. Using cooling charging charts provided. Using cooling charging charts provided. Fig. add or remove refrigerant until conditions of the chart are met. 50/60 Hz Circuit B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 REDUCE CHARGE IF BELOW CURVE 30 80 20 70 60 200 250 a38-7176 1500 LEGEND SST — Saturated Suction Temperature 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. 42 — Charging Chart — 38APD040 — Circuit B. 0 a38-7177 60.0 40 100. 50/60 Hz Circuit A 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7178 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 LEGEND 1500 SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. 43 — Charging Chart — 38APS040.0 400.Single Circuit 130. add or remove refrigerant until conditions of the chart are met.0 110. Fig. Fig. Using cooling charging charts provided.0 1500 LEGEND SST — Saturated Suction Temperature 2000 2500 3000 3500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. add or remove charge in 1/4 lb increments until complete. add or remove charge in 1/4 lb increments until complete.0 REDUCE CHARGE IF BELOW CURVE 30 80.0 300.0 200.0 90. Charge should be added in small increments.0 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 550. 44 — Charging Chart — 38APD050 — Circuit A. add or remove refrigerant until conditions of the chart are met. Ensure that all fans are on and all compressors are running when using charging charts.0 600. As conditions get close to the point on the chart.0 350.0 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) RATURE 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 RATURE LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120.0 500. 50/60 Hz 39 . Ensure that all fans are on and all compressors are running when using charging charts. As conditions get close to the point on the chart. Using cooling charging charts provided.0 450.0 250.0 20 70. 46 — Charging Chart — 38APS050. add or remove refrigerant until conditions of the chart are met. Ensure that all fans are on and all compressors are running when using charging charts. Using cooling charging charts provided. As conditions get close to the point on the chart. 50/60 Hz Single Circuit 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7180 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Fig. 50/60 Hz 40 . Charge should be added in small increments. 45 — Charging Chart — 38APD050 — Circuit B.Circuit B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 200 250 a38-7179 LEGEND SST — Saturated Suction Temperature 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Ensure that all fans are on and all compressors are running when using charging charts. Charge should be added in small increments. add or remove refrigerant until conditions of the chart are met. Fig. add or remove charge in 1/4 lb increments until complete. add or remove charge in 1/4 lb increments until complete. Using cooling charging charts provided. As conditions get close to the point on the chart. 50/60 Hz 41 .0 300.0 200. add or remove charge in 1/4 lb increments until complete. add or remove refrigerant until conditions of the chart are met.0 LEGEND SST — Saturated Suction Temperature 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Fig.0 600.0 400.0 90.0 20 70. 47 — Charging Chart — 38APD060 — Circuit A. Using cooling charging charts provided.0 450.Circuit A 130.0 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) RATURE 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 RATURE LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120. Ensure that all fans are on and all compressors are running when using charging charts.0 200.0 40 100.0 300. Charge should be added in small increments.0 REDUCE CHARGE IF BELOW CURVE 30 80.0 250.0 450.0 a38-7182 60. Ensure that all fans are on and all compressors are running when using charging charts.0 350.0 500.0 110.0 90.0 LEGEND SST — Saturated Suction Temperature 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques.0 400. 50/60 Hz Circuit B 130.0 a38-7181 60.0 50 SST LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) RATURE 50 RATURE LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120.0 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550.0 500.0 20 70. add or remove refrigerant until conditions of the chart are met. Using cooling charging charts provided.0 ADD CHARGE IF ABOVE CURVE 40 SST 30 SST 110.0 REDUCE CHARGE IF BELOW CURVE 30 80. As conditions get close to the point on the chart. Fig.0 40 100. As conditions get close to the point on the chart.0 600. 48 — Charging Chart — 38APD060 — Circuit B. add or remove charge in 1/4 lb increments until complete.0 350.0 250.0 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550. add or remove charge in 1/4 lb increments until complete. Charge should be added in small increments. 50 — Charging Chart — 38APD070 — Circuit B. Fig. As conditions get close to the point on the chart. Using cooling charging charts provided. Fig. 50/60 Hz Circuit B 130 50 SST LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7184 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. As conditions get close to the point on the chart. add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.Circuit A 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7183 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. 50/60 Hz 42 . Ensure that all fans are on and all compressors are running when using charging charts. add or remove refrigerant until conditions of the chart are met. add or remove refrigerant until conditions of the chart are met. Using cooling charging charts provided. 49 — Charging Chart — 38APD070 — Circuit A. Ensure that all fans are on and all compressors are running when using charging charts. As conditions get close to the point on the chart. 51 — Charging Chart — 38APD080 — Circuit A. 52 — Charging Chart — 38APD080 — Circuit B. add or remove charge in 1/4 lb increments until complete. Fig. add or remove refrigerant until conditions of the chart are met. add or remove charge in 1/4 lb increments until complete.Circuit A 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7185 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Using cooling charging charts provided. Fig. Charge should be added in small increments. 50/60 Hz Circuit B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7186 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. add or remove refrigerant until conditions of the chart are met. 50/60 Hz 43 . Using cooling charging charts provided. Ensure that all fans are on and all compressors are running when using charging charts. As conditions get close to the point on the chart. 54 — Charging Chart — 38APD090 — Circuit B. As conditions get close to the point on the chart. 50/60 Hz Circuit B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 ADD CHARGE IF ABOVE CURVE 50 SST 40 SST 30 SST 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7188 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 LEGEND SST — Saturated Suction Temperature 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. add or remove charge in 1/4 lb increments until complete. 50/60 Hz 44 . Charge should be added in small increments. Fig. Charge should be added in small increments.Circuit A 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 ADD CHARGE IF ABOVE CURVE 50 SST 40 SST 30 SST 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7187 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 LEGEND SST — Saturated Suction Temperature 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. add or remove charge in 1/4 lb increments until complete. add or remove refrigerant until conditions of the chart are met. Fig. Using cooling charging charts provided. Ensure that all fans are on and all compressors are running when using charging charts. Using cooling charging charts provided. Ensure that all fans are on and all compressors are running when using charging charts. add or remove refrigerant until conditions of the chart are met. 53 — Charging Chart — 38APD090 — Circuit A. As conditions get close to the point on the chart. Fig. Charge should be added in small increments. add or remove refrigerant until conditions of the chart are met. 50/60 Hz Circuit B 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 a38-7190 200 250 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 LEGEND SST — Saturated Suction Temperature 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Using cooling charging charts provided. add or remove charge in 1/4 lb increments until complete. add or remove charge in 1/4 lb increments until complete.Circuit A 130 LIQUID TEMPERATURE AT LIQUID VALVE (DEG C) E 50 SST 40 SST 30 SST ADD CHARGE IF ABOVE CURVE 50 E LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) 120 110 40 100 90 30 80 REDUCE CHARGE IF BELOW CURVE 20 70 60 200 250 a38-7189 LEGEND SST — Saturated Suction Temperature 300 350 400 450 500 LIQUID PRESSURE AT LIQUID VALVE (PSIG) 2000 2500 3000 3500 550 600 1500 4000 LIQUID PRESSURE AT LIQUID VALVE (kPag) NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Ensure that all fans are on and all compressors are running when using charging charts. 55 — Charging Chart — 38APD100 — Circuit A. Ensure that all fans are on and all compressors are running when using charging charts. As conditions get close to the point on the chart. add or remove refrigerant until conditions of the chart are met. 56 — Charging Chart — 38APD100 — Circuit B. Using cooling charging charts provided. Charge should be added in small increments. As conditions get close to the point on the chart. Fig. 50/60 Hz 45 . a38-7117 † † LEGEND LLS — Liquid Line Solenoid TXV — Thermostatic Expansion Valve *Field-supplied. †Field-supplied when required. Must be controlled by 38AP unit control. Fig. 57 — Required Location of Solenoid Valves and Recommended Filter Drier and Sight Glass Locations for 38APD025-100 Dual-Circuit Units a38-7118 SECTION 1 LIQUID LINE SECTION 2 SOLENOID VALVE† SECTION 1 LIQUID LINE SECTION 2 SOLENOID VALVE† *Field-supplied. †Field-supplied when required. Must be controlled by 38AP unit control. Fig. 58 — Required Location of Solenoid Valves and Recommended Filter Drier and Sight Glass Locations for 38APS025-050 Single-Circuit Units 46 Check Compressor Oil Level — After adjusting the refrigerant charge, allow each circuit to run fully loaded for 20 minutes. Stop the compressors and check the oil level. Oil level should be 1/8 to 3/8 up on the sight glass. IMPORTANT: Oil level should only be checked when the compressors are off. Add oil only if necessary to bring the oil into view in the sight glass. If oil is added, run the circuit for an additional 10 minutes, then stop and check oil level. If the level remains low, check the piping system for proper design for oil return; also, check the system for leaks. If checking the oil level with unit running in part load, let unit run one hour, then run at full load for 10 minutes. If oil does not return to acceptable sight glass levels, check for correct suction piping and line sizing. SUCTION SCHRADER B SPT A RGT A SUCTION SCHRADER A RGT B SPT B HPS A DPT A HPS B DTT A DPT B Final Checks — Ensure all safety controls are operating, control panel covers are on, and the service panels are in place. Oil Charge CAUTION The compressor in a Puron® refigerant (R-410A) system uses a polyol ester (POE) oil. This is extremely hygroscopic, meaning it absorbs water readily. POE oils can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere. Failure to do so could result in possible equipment damage. Puron systems use a polyol ester (POE) oil. Use only Carrier approved compressor oil. Oil should be visible in compressor oil sight glass. An acceptable oil level is from 1/8 to 3/8 of sight glass. All compressors must be off when checking oil level. Recommended oil level adjustment method is as follows: ADD OIL — Recover charge from the outdoor section of the unit and isolate the condensing unit using the liquid and suction service valves. Add oil to suction line Schrader valve on tandem compressors sets and the compressor Schrader on the trio and single compressor circuits. (See Fig. 59 and 60.) When oil can be seen at the bottom of the sight glass, add oil in 5 oz increments which is approximately 1/8 in oil level. Run all compressors for 20 minutes then shut off to check oil level. Repeat procedure until acceptable oil level is present. NOTE: Use only Carrier approved compressor oil. Approved sources are: Totaline . . . . . . . . . . . . . . . . . . . . . . .3MAF POE P903-1601 Mobil. . . . . . . . . . . . . . . . . . . . . . . . . . . EAL Arctic 32-3MA Uniqema . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RL32-3MAF Do not reuse oil that has been drained out, or oil that has been exposed to atmosphere. DPT DTT HPS RGT SPT — — — — — LEGEND Discharge Pressure Transducer Discharge Temperature Thermistor High Pressure Switch Return Gas Temperature Sensor Space Temperature Sensor OIL SIGHT GLASS Fig. 59 — Typical Tandem Compressor Assembly SPT A SUCTION SCHRADER A RGT A HPS A DPT A DTT A OIL ADD LOCATION OIL SIGHT GLASS Actual Start-Up NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-5. Actual start-up should be done only under supervision of a qualified refrigeration mechanic. VAV APPLICATIONS — C.TYP = 1 and 9 1. Start indoor fan motor. 2. Fan status switch input should close. Note the unit will not start unless the Fan Status input is closed. 3. Unit C.TYP = 1: Using the scrolling marquee display, set leaving set point (Set PointCOOLCSP.1). Unit C.TYP = 9: Using the 4 to 20mA input, set the control point (Run StatusVIEWCTPT) for leaving set point. DPT DTT HPS RGT SPT — — — — — LEGEND Discharge Pressure Transducer Discharge Temperature Thermistor High Pressure Switch Return Gas Temperature Sensor Space Temperature Sensor Fig. 60 — Typical Trio Compressor Assembly 4. Turn ENABLE/OFF/REMOTE CONTACT switch to ENABLE position. 5. If supply air temperature is greater than the control point the unit will start to stage up. CV APPLICATION — C.TYP = 4 1. Start indoor fan motor. 47 2. Fan status switch input should close. Note the unit will not start unless the fan status input is closed. 3. Close Y1 input unit will stage up to 50 % capacity with 1 minute between stages. 4. Close Y2 input the unit will stage up to 100% capacity with 1 minute between stages. CV APPLICATION — C.TYP = 3 1. Start indoor fan motor. 2. Fan status switch input should close. Note the unit will not start unless the fan status input is closed. 3. Close Y1 input unit. The control will control supply-air temperature to CSP1 and stage capacity as required. 4. Close Y2 input. The unit will control supply-air temperature to CSP2 and stage capacity as required. CV APPLICATION — C.TYP = 5 1. Start indoor fan motor. 2. Fan status switch input should close. Note the unit will not start unless the fan status input is closed. 3. The control will use space temperature (Temperatures SPT) vs space temperature set point (Set Point COOLSPS.P) to decide to whether to control supplyair temperature to CSP1 or CSP2, and will stage capacity as required. % CAPACITY INPUT — C.TYP = 7 1. Start indoor fan motor. 2. Fan status switch input should close. Note the unit will not start unless the fan status input is closed. 3. The control will adjust unit capacity based on the 4 to 20mA Cool mA (INPUTS4-20CL.MA). 4. Actual capacity and desired capacity may be different due to unit diagnostics. The maximum voltage deviation is the largest difference between a voltage measurement across 2 legs and the average across all 3 legs. Example: Supply voltage is 240-3-60. AB = 243 v BC = 236 v AC = 238 v 1. Determine average voltage: Average voltage = = 243 + 236 + 238 3 717 3 = 239 2. Determine maximum deviation from average voltage: (AB) 243 – 239 = 4 v (BC) 239 – 236 = 3 v (AC) 239 – 238 = 1 v Maximum deviation is 4 v. 3. Determine percent voltage imbalance: % Voltage Imbalance = 100 x = 1.7% This voltage imbalance is satisfactory as it is below the maximum allowable of 2%. IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately. Do not operate unit until imbalance condition is corrected. Control Circuit Power — Power for the control circuit is supplied from the main incoming power through a factoryinstalled control power transformer (TRAN1) for all models. Field wiring connections are made to LVT terminal board. 4 239 OPERATION Operating Limitations AMBIENT LMITATIONS — See Table 16 for ambient limitations. Table 16 — 38AP Unit Ambient Limitations Single Circuit 38APS UNIT SIZE 025-050 MINIMUM LOW AMBIENT (Standard Unit) 45 F (7.2 C) MINIMUM LOW AMBIENT MOTORMASTER® CONTROL* –20 F ( –28.9 C) MAXIMUM AMBIENT† 122 F (50 C) Dual Circuit 38APD UNIT SIZE 025-040 050-060 070-100 MINIMUM LOW AMBIENT (Standard Unit) 32 F (0 C) 25 F ( –3.9 C) 32 F (0 C) MINIMUM LOW AMBIENT MOTORMASTER CONTROL* –20 F ( –28.9 C) –20 F ( –28.9 C) –20 F( –28.9 C) MAXIMUM AMBIENT† 122 F (50 C) 122 F (50 C) 122 F (50 C) * Factory-installed option or field-installed accessory. †Operation above listed temperature depends on the saturated suction temperature the unit is operating at. Refer to ECAT for exact limitations. VOLTAGE (ALL UNITS) Main Power Supply — Minimum and maximum acceptable supply voltages are listed in the Installation Instructions. Unbalanced 3-Phase Supply Voltage — Never operate a motor where a phase imbalance between phases is greater than 2%. To determine percent voltage imbalance: max voltage deviation from avg voltage % Voltage Imbalance = 100 x average voltage Operation Sequence — During unit off cycle, if power is maintained to the unit and the EMERGENCY ON/OFF switch is left in the OFF position, the compressor crankcase heaters will be energized. The unit is started by putting the ENABLE/OFF/REMOTE CONTACT switch in the ENABLE or REMOTE CONTACT position. When the unit receives a call to run (either from the internal control, or CCN network command or remote contact closure), the unit stages up in capacity to maintain either supply air temperature or space temperature. The first compressor starts 11/2 to 3 minutes after the call for cooling. The lead circuit can be specifically designated on all models or selected based on compressor run hours and starts depending on field configuration. The unit control will override this selection under certain starting conditions to properly maintain oil return to the compressors. The MBB controls fan stages to maintain the head pressure set point and will automatically adjust unit capacity as required to keep compressors from operating outside of the specified envelope. There are no pumpout or pumpdown sequences on these units. The liquid line solenoid valve is energized anytime a compressor is operating in the circuit and also when the circuit is OFF and the OAT is less than the SST. The liquid line solenoid valve is de-energized 5 seconds after the circuit stops and also when the circuit is OFF and the OAT is greater than the SST plus 2° F. Each circuit operates independently. 48 resistance and voltage drop performance than the 5 k thermistors.B) — Add a small amount of thermal conductive grease to the thermistor well and end of probe.B) — The RGTA. 3. 49 . These thermistors are 5 k thermistors.B thermistors are located in the suction line of the respective circuits and are used to monitor superheat entering the compressor and generate low superheat alarms. Thermistors — Electronic control uses up to 7 thermistors to sense temperatures used to control operation of the unit. The RAT thermistor is configurable to be either a 5 k or 10 k thermistor. resistance and voltage drop performance tables should be followed based on the configuration. Failure to do so could result in personal injury. For unit sizes 025-030. The RAT is used to measure the evaporator entering or return air temperature of the unit. This is configured under the Configuration menu OPT1. resistance and voltage drop performance tables should be followed based on configuration. the upper center latched door on sizes 040-060 gives access to the controls. The sensor is connected to the LVT. measure temperature at probe location with an accurate thermocouple-type temperature measuring instrument. RETURN GAS THERMISTORS (RGTA. If a more accurate check is required. The standard unit comes with return gas temperature (RGT) and outside air temperature (OAT) thermistors. SPACE TEMPERATURE THERMISTOR (SPT) — This sensor is a field-supplied accessory and is part of the T55 or T56 sensor package that can be used to control space temperature on constant volume (CV) units. Loading sequence for compressors is shown in Table 8.T and by selecting 0 for 5 k or 1 for 10 k or 2 for none. The front door(s) provide access to the compressor(s) and all components of the refrigeration system. SUPPLY AIR THERMISTOR (SAT) — This sensor is field supplied and is used to measure the supply air temperature of the unit. DISCHARGE TEMPERATURE THERMISTOR (DTT) — This sensor is only used on units with a digital compressor. SERVICE WARNING ELECTRIC SHOCK HAZARD: Turn off all power to unit before servicing. The proper temperature vs. The SAT thermistor is configurable to be either a 5 k or 10 k thermistor. 1. 61). the unit may temporarily be unable to maintain the desired leaving-air temperature because of imposed power limitations. Using the voltage reading obtained. The remaining thermistors are installed in either the space. To check thermistor accuracy. These include the space temperature (SPT). Care should be taken to ensure the configuration matches the type of thermistor which is installed. Insulate thermocouple to avoid ambient temperatures from influencing reading. The SPT has a 10 k input channel and has a different set of temperature vs. ductwork or air handler. Access to the compressors is through latched panels from beneath the control box on the unit sizes 025-060 and on each end of the unit on sizes 070-100. This is configured under the Configuration menu OPT1. For details on controls refer to Operating Data section. The proper temperature vs. Compare the values determined with the value read by the control in the Temperatures mode using the scrolling marquee display. use field disconnect. THERMISTOR/TEMPERATURE SENSOR CHECK — A high quality digital volt-ohmmeter is required to perform this check. Temperature measured by thermocouple and temperature determined from thermistor voltage reading should be close. SAT. Care should be taken to ensure the configuration matches the type of thermistor which is installed. RETURN AIR OR EVAPORATOR AIR THERMISTOR (RAT) — This sensor is field supplied and should be located directly upstream of the evaporator. REPLACING RETURN GAS THERMISTORS (RGTA. It attaches to the discharge line using a spring clip and protects the system from high discharge gas temperature when the digital compressor is used. unit must be shut down and thermistor removed and checked at a known temperature (freezing point or boiling point of water) using either voltage drop measured across thermistor at the J8 terminal. Resistance at various temperatures is listed in Tables 17-21. if temperature reset is used. ± 5° F (3° C) if care was taken in applying thermocouple and taking readings. Connect the digital voltmeter across the appropriate themistor terminals at the J8 terminal strip on the main base board (see Fig. The sensor is mounted on the discharge line close to the discharge of the digital compressor. See Table 3 for thermistor pin connection points. supply air temperature (SAT) and return air temperature (RAT/EAT) thermistors. Tighten the retaining nut 1/4 turn past finger tight. access to the controls is through the upper latched outer door above the compressor access door. identical in their temperature and voltage drop performance. The ENABLE/OFF/REMOTE CONTACT switch on control panel does not shut off control power. RAT.T and by selecting 0 for 5 k or 1 for 10 k or 2 for none. It is used to control fan cycling on the unit. read the sensor temperature from Tables 17-21.For all units. If demand limit is used. by determining the resistance with unit shut down and thermistor disconnected from J8. Inner panels are secured in place and should not be removed unless all power to the unit is off. Electronic Components CONTROL COMPONENTS — Unit uses an advanced electronic control system that normally does not require service. the unit controls to a higher leaving temperature as the building load reduces. Similarly. This sensor is a 86 k thermistor connected to the AUX board. OUTSIDE AIR THERMISTOR (OAT) — The OAT is located inside the base rail on unit sizes 025-060 and on the back of the control box on sizes 070-100. 2. 608 0.979 9.217 1.038 3.402 2.523 3.707 91.034 2.281 3.562 1.213 0.212 74.804 1.982 1.165 2.291 8.879 1.903 0.155 0.474 3.873 0.516 1.171 0.800 37.142 0.651 0.418 3.668 3.066 42.705 1.298 1.228 0.103 2.637 5.016 2.911 6.165 0.994 2.272 0.190 1.814 16.393 18.191 2.674 0.511 0.613 3.526 51.173 0.647 3.509 3.272 63.270 2.622 4.349 2.239 0.322 0.609 2.950 0.587 0.473 27.829 1.265 1.558 2.112 2.381 0.735 0.609 1.640 0.060 2.070 59.520 RESISTANCE (Ohms) 7.096 4.624 26.761 0.829 0.217 0.996 45.165 3.779 1.148 0.165 1.485 0.214 13.822 1.311 0.402 0.826 13.007 986 965 945 925 906 887 868 850 832 815 798 782 765 750 734 719 705 690 677 663 650 638 626 614 602 591 581 570 561 551 542 533 524 516 508 501 494 487 480 473 467 461 456 450 445 439 434 429 424 419 415 410 405 401 396 391 386 382 377 372 367 361 356 350 344 338 332 325 318 311 304 297 289 282 50 .259 0.583 2.538 0.435 35.143 48.461 9.133 61.658 3.146 0.206 0.448 1.858 0.231 0.395 0.339 0.200 0.614 14.060 3.163 0.072 1.257 1.557 0.977 1.814 3.373 1.480 3.243 3.627 79.335 2.402 3.124 3.888 0.175 69.346 15.262 3.082 3.277 0.244 2.502 0.488 2.361 1.679 41.918 0.224 3.892 15.339 40.801 0.096 22.345 1.804 26.522 88.538 1.158 0.170 3.311 17.815 0.781 5.577 0.031 2.237 1.401 1.029 1.291 0.231 33.027 14.344 0.268 0.434 3.450 3.486 82.689 3.879 2.647 1.255 0.710 2.375 0.632 1.735 2.060 2.306 0.176 31.497 5.929 5.245 24.000 3.318 1.494 3.404 1.385 2.323 2.350 0.926 2.160 0.547 19.068 1.773 2.576 3.235 0.141 1.382 1.313 34.423 0.618 0.436 2.698 0.656 1.051 1.428 2.490 65.291 1.787 0.260 29.663 0.251 0.118 1.103 3.286 2.229 5.162 55.086 1.529 0.453 15.361 5.905 1.972 2.297 16.101 4.739 8.133 RESISTANCE (Ohms) 1.376 2.713 2.282 0.835 2.550 3.723 0.789 23.784 2.210 0.648 72.430 1.185 32.505 44.104 1.112 10.597 2.730 12.449 85.843 0.362 0.081 57.717 9.224 0.197 0.699 3.532 2.369 0.597 0.655 2.796 17.567 0.470 1.278 1.192 2.624 3.138 2.138 0.141 1.408 0.855 4.135 0.250 9.790 67.937 1.686 0.299 3.426 1.548 0.296 2.196 4.214 TEMP (F) 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 VOLTAGE DROP (V) 0.153 20.976 4.541 46.906 3.298 4.403 4.511 8.779 21.564 6.601 3.076 TEMP (F) 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 VOLTAGE DROP (V) 1.240 1.144 0.964 2.352 3.247 0.081 5.856 2.449 13.480 2.506 2.317 0.949 2.956 1.319 1.Table 17 — 5K Thermistor Temperatures (°F) vs.301 0.369 3.660 2.542 2.213 8.333 0.903 2.493 1.091 6.759 2.318 3.033 1.286 0.804 50.469 0.680 1.099 3.243 3.686 7.930 1.860 1.550 1.198 1.983 0.588 3.205 3.427 21.629 0.960 19.754 1.640 3.898 2.387 12.095 1.774 0.008 RESISTANCE (Ohms) 98.614 1.634 2.311 53. Resistance/Voltage Drop TEMP (F) –25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 VOLTAGE DROP (V) 3.556 3.430 0.596 36.182 0.185 0.277 7.147 2.735 6.220 0.665 7.395 3.239 2.726 3.459 1.536 3.053 11.730 11.468 7.160 1.679 3.999 0.489 1.016 0.243 0.729 1.816 10.973 8.351 28.808 2.636 3.217 2.737 4.585 1.086 2.748 0.176 0.685 2.151 0.966 0.335 3.399 6.179 0.494 0.047 38.438 0.681 1.179 1.011 25.898 1.934 0.832 2.582 1.453 0.264 0.018 1.715 1.511 4.340 1.843 18.145 3.519 1.750 1.168 0.854 1.465 3.327 0.416 11.203 0.122 1.477 0.153 0.050 1.140 0.317 3.529 10.188 0.445 0.084 12.454 2.194 0.191 0.388 0.356 0.185 3.871 77.505 23.416 0.238 6.386 3.786 1.202 30.461 0.563 3.710 0.010 94.296 0. 211 0.028 3.515 14.547 2.217 2.500 2.840 6.476 34.860 2.260 94.629 3.639 2.532 22.177 3.459 2.580 1.499 7.559 2.265 2.691 0.378 1.168 0.026 13.610 0.497 1.434 3.309 0.103 3.134 RESISTANCE (Ohms) 1.076 2.193 0.126 1.801 1.163 20.450 48.194 1.265 1.230 0.383 0.754 1.204 0.313 3.609 1.807 43.008 2.945 2.940 0.417 1.312 2.912 0.360 2.573 0.713 0.782 0.300 0.999 0.250 65.670 1.199 0.710 5.150 0.313 21.705 3.223 0.668 3.462 3.696 12.447 0.118 1.985 2.212 3.329 0.420 57.101 2.274 0.861 3.441 9.337 1.710 1.758 0.216 27.021 1.935 1.888 2.593 2.982 1.536 45.065 3.349 0.170 2.363 2.165 88.701 3.773 2.182 0.006 971 938 906 876 836 805 775 747 719 693 669 645 623 602 583 564 547 531 516 502 489 477 466 456 446 436 427 419 410 402 393 385 376 367 357 346 335 324 312 299 285 51 .971 5.172 0.685 2.461 0.200 TEMP (C) 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 VOLTAGE DROP (V) 0.627 8.489 32.290 1.404 3.146 0.204 4.407 0.247 3.855 7.485 9.244 0.807 0.633 26.041 1.536 6.687 3.079 1.889 1.325 15.161 6.480 83.371 0.903 2.439 1.281 3.387 1.583 4.555 0.094 17.407 2.360 0.580 69.969 0.272 2.730 2.608 3.786 4.231 TEMP (C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 VOLTAGE DROP (V) 1.799 1.555 51.Table 18 — 5K Thermistor Temperatures (°C) vs.184 2.649 3.376 3.817 2.291 0.030 0. Resistance/Voltage Drop TEMP (C) –32 –31 –30 –29 –28 –27 –26 –25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VOLTAGE DROP (V) 3.283 0.251 0.217 0.061 1.123 2.247 40.025 2.158 1.420 0.085 11.493 1.549 3.949 9.395 0.591 0.522 RESISTANCE (Ohms) 7.000 4.202 24.188 0.125 73.621 30.649 0.663 2.550 1.258 0.229 1.163 0.237 0.345 3.160 1.885 0.058 18.871 1.563 3.944 1.184 16.858 0.079 19.134 3.225 5.342 12.629 0.538 0.158 0.959 10.845 38.339 0.457 1.866 29.154 0.093 1.340 1.266 3.044 8.490 0.319 0.539 3.506 10.302 1.433 0.538 1.475 0.461 5.832 0.735 0.734 1.774 2.623 1.454 2.875 54.749 14.844 1.266 0.029 RESISTANCE (Ohms) 100.140 3.170 78.592 38.514 3.506 0.177 0.406 3.586 3.389 4.205 61.666 1.669 0.142 0.246 5.244 1.138 0.827 23.489 3. 505 4.782 0.419 0.333 0.244 1.855 1.717 154.478 13.304 1.003 1.251 8.113 25.639 1.166 2.996 0.190 1.558 100.727 68.653 8.449 5.498 1.666 0.455 3.275 0.409 2.696 4.383 6.986 2.409 1.300 0.431 1.286 72.530 6.980 0.288 0.144 2.012 0.454 0.210 5.297 2.814 12.240 44.903 3.999 6.676 0.461 0.328 4.310 4.202 2.298 3.645 0.530 2.439 62.402 126.715 24.313 3.324 41.533 4.948 1.433 0.244 3.296 0.180 13.278 1.614 0.653 2.544 1.838 6.343 0.132 1.453 189.840 3.975 1.713 1.365 0.558 0.043 2.317 TEMP (F) 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 VOLTAGE DROP (V) 2.940 70.593 11.338 0.571 5.776 3.476 0.587 3.178 3.592 2.373 27.569 33.177 28.162 77.838 26.559 3.867 1.975 3.273 4.132 4.447 19.644 4.595 0.750 3.654 3.391 2.994 2.016 998 981 964 947 931 915 900 885 870 855 841 827 814 800 787 774 762 749 737 725 714 702 691 680 670 659 649 639 629 620 610 601 592 583 574 566 557 52 .866 2.745 0.697 3.439 2.890 0.370 0.333 7.376 0.549 107.723 3.507 0.724 4.359 0.067 4.195 4.699 0.139 12.324 1.572 4.894 1.853 3.238 3.998 20.169 1.447 0.056 3.926 38.490 4.290 2.928 1.008 3.901 2.233 1.762 9.279 0.000 171.662 75.165 6.529 3.577 34.268 3.147 3.033 1.183 122.576 0.062 1.470 2.932 2.733 0.049 2.211 1.609 4.655 4.253 2.820 1.542 66.096 4.715 4.927 3.552 16.208 3.827 5.705 4.758 0.561 2.862 0.688 1.686 4.052 1.396 82.386 18.693 52.009 29.539 2.615 1.028 1.789 1.925 14.039 55.676 4.292 0.965 0.416 3.627 46.573 20.264 RESISTANCE (Ohms) 2.215 4.096 1.003 1.483 0.070 1.828 3.025 RESISTANCE (Ohms) 196.086 3.523 0.540 0.560 4.476 4.655 0.884 11.998 3.399 22.665 4.966 1.603 3.770 0.350 1.984 4.949 0.597 26.060 94.098 5.382 0.346 4.254 4.590 2.018 118.366 1.764 10.354 0.345 1.951 3.752 2.255 1.869 7.031 10.888 43.363 4.500 2.087 2.715 2.625 1.397 4.526 9.781 57.809 2.019 88.327 5.021 3.606 32.349 2.328 3.079 165.171 85.056 7.379 2.790 37.128 1.624 0.078 8.934 0.302 1.905 RESISTANCE (Ohms) 14.357 3.663 1.465 64.621 4.821 0.185 4.722 0.961 5.612 58.634 0.876 0.089 1.493 12.567 1.654 31.758 4.564 4.741 4.148 1.323 0.453 1.235 4.461 4.519 4.426 0.308 11.697 2.670 3.666 4.491 60.777 2.413 4.610 35.729 80.891 1.305 0.400 1.238 159.808 2.387 3.287 97.006 103.206 1.174 4.445 3.681 36.111 4.839 2.656 1.532 0.738 1.284 0.044 4.400 0.318 0.515 0.042 23.963 2.491 0.187 1.439 2.343 2.260 2.507 7.698 5.468 0.153 4.236 110.848 0.370 4.770 22.503 3.567 0.309 0.168 1.380 4.065 47.209 TEMP (F) 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 VOLTAGE DROP (V) 0.719 1.268 0.475 1.083 2.687 0.795 0.076 114.020 91.272 0.030 2.277 4.684 2.375 1.292 4.681 3.089 4.124 2.604 0.300 177.086 50.059 2.407 0.394 0.396 24.108 1.683 6.841 1.429 4.443 134.750 4.326 1.238 6.870 2.173 2.284 1.546 4.536 1.264 1.250 139.383 3.714 15.388 0.300 9.178 3.150 1.501 10.531 3.808 0.349 0.759 3.319 2.194 144.921 1.319 53.131 15.685 7.565 1.769 4.923 3.802 3.862 8.117 3.591 1.249 10.752 1. Resistance/Voltage Drop TEMP (F) –25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 VOLTAGE DROP (V) 4.622 2.112 3.045 1.114 1.474 3.000 9.786 1.441 16.231 2.598 42.521 1.815 1.440 0.926 2.860 30.692 183.746 2.876 4.597 4.448 8.499 0.225 1.585 4.488 2.344 149.115 2.835 0.687 1.904 17.384 17.549 14.919 0.824 13.763 1.633 4.508 1.903 19.328 0.426 1.733 4.752 30.095 4.Table 19 — 10K Thermistor Temperature (°F) vs.387 1.314 0.480 1.453 1.118 39.413 0.615 3.594 1.585 0.161 21.467 4.557 49.891 130.549 0.878 3.991 16.874 18.710 0.079 1.187 11.445 4.643 2. 340 3.272 0.610 2.121.457 0.120 1.512 0.810 37.482 130.037 1.626 0.876 1.790 9.680 21.686 3.402 122.396 0.014 5.485 3.480 1.000 9.868 97.942 11.734 3.752 1.335 4.392 49.052 26.675 2.342 156.508 4.555 2.720 7.127 2.060 91.449 10.889.990 280.310 0.439 1.440 834.500 2.111 RESISTANCE (Ohms) 200.790 0.767 0.918 20.813 0.730 10.546 5.903 18.220 1.662 77.431 0.862 0.743 3.527 0.738 1.748 4.482 4.303 4.588 86.418 10.777 2.400 15.574 0.324 1.571 9.365 0.250 1.162 72.030 29.345 0.972 18.396 24.140 107.328 3.280 56.654 31.800 1.415 55.455 4.602 4.160 45.648 1.806 6.480 1.850 5.215 1.714 15.828 3.558 0.090 4.920 2.644 4.961 3.745 0.617 42.200 1.003 3.083 2.483 0.391 2.703 0.170 135.497 0.637 3.724 0.090 17.591 0.350 2.693 1.056 7.324 40.400 TEMP (C) 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 VOLTAGE DROP (V) 0.367 32.408 0.870 3.587 3.375 0.042 3.833 2.318 0.280 2.579 2.944 2.087.013 21.921 10.781 3.878 1.020 1.171 23.386 0.407 8.182 34.887 0.770 5.470 0.340 177.327 5.444 0.362 1.493 11.580 2.813 1.117 4.397 4.692 1.918 4.605 1.663 0.469 3.010 920 830 53 .510 188.235 2.056 3.011 1.085 4.711 58.400 1.075 102.164 8.071 12.603 3.178 2.319 52.645 0.537 3.096 6.542 0.200 7.410 171.025 1.727 4.784 1.774 2.269 4.337 2.005 974 944 915 889 861 836 811 787 764 742 721 700 680 661 643 626 609 592 576 561 Table 21 — 86K Thermistor vs Resistance (DTT) TEMP (C) TEMP (F) RESISTANCE (Ohms) TEMP (C) TEMP (F) RESISTANCE (Ohms) -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 70 -40 -31 -22 -13 -4 5 14 23 32 41 50 59 68 77 86 95 104 113 122 131 140 158 2. Resistance/Voltage Drop TEMP (C) –32 –31 –30 –29 –28 –27 –26 –25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VOLTAGE DROP (V) 4.716 4.530 6.355 0.109 36.165 3.464 TEMP (C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 VOLTAGE DROP (V) 3.562 1.666 2.996 0.663 4.433 3.404 147.488 2.521 1.637 1.557 4.450 3.820 218.681 13.134 138.025 0.255 16.219 61.153 38.280 475.117 1.870 6.070 1.740 363.401 7.140 1.683 0.608 0.419 0.370 4.431 1.837 0.217 3.990 25.255 1.336 0.957 65.624 4.266 6.807 115.968 RESISTANCE (Ohms) 15.099 2.975 1.710 109.315 2.323 13.830 1.590 1.252 1.231 2.682 4.445 2.000 2.217 1.070 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 167 176 185 194 203 212 221 230 239 248 257 266 275 284 293 302 311 320 329 338 347 356 12.522.381 3.913 0.183 1.199 4.426 4.075 2.302 0.279 0.926 1.686 25.104 1.284 2.203 4.582 1.440 86.340 1.327 0.720 627.000 69.774 5.721 2.463 81.385 1.917 3.580 30.265 RESISTANCE (Ohms) 2.530 1.986 2.124 4.287 0.889 3.640 47.Table 20 — 10K Thermistor Temperature (°C) vs.762 4.000 166.220 3.943 1.544 4.055 1.162 4.367 4.000 14.733 4.878 2.700 4.288 1.580 4.873 3.150 1.776 8.600 2.086 1.294 0.052 44.883 19.177 1.235 4.274 3.940 68.044 4.940 0.889 2.157 2.390 1.533 4.498 28.297 1. See Fig. 62 — Mounted Fan Position J12 3 4 RGTB LVT T55 23 22 SEN T-55 ACCSY OAT IMPORTANT: Check for proper fan rotation (clockwise when viewed from above). be sure all procedures pertaining to installation and wiring have been properly followed. If necessary. J8 Connector TROUBLESHOOTING — If a transducer is suspected of being faulty. If supply voltage is correct. Ensure that all personnel are clear of fans and guards are installed before applying power. If a situation arises where the drive does not function properly. (8 mm) below top of orifice on the fan deck to top of the fan hub. motor. This can result in premature failure of the capacitors if the drive is operated after such a long period of inactivity or storage. If fan motor must be removed for service or replacement. apply input power to the drive for 8 hours prior to actually operating the motor. the electrolytic DC bus capacitors within the drive can change internally. which is generated by the main base board (MBB). etc.Pressure Transducers — The suction and discharge transducers are different part numbers and can be distinguished by the color of the transducer body. LOW SOUND FAN — A shroud and a wire guard provide protection from the rotating fan. this equipment is designed to start when it receives line power. Before attempting to operate the drive. 61 — Thermistor Connections to Main Base Board. 62. In order to reform the capacitors and prepare the drive for operation after a long period of inactivity. The fan motor has a step in the motor shaft. 61 for transducer connections to the J8 connector on the MBB.3 N·m). Use extreme caution when servicing the drive. The exposed end of the fan motor shaft is protected from weather by grease. resulting in excessive leakage current. Figures 59 and 60 shows typical location of pressure transducers on each circuit. the information provided below and in Table 22 can be used to troubleshoot the drive. Tighten the bolt to 15 ± 1 ft-lb (20 ± 1. CAUTION If input power has not been applied to the drive for a period of time exceeding three years (due to storage.) Tighten set screws to 15 ± 1 ft-lb (20 ± 1. be sure to regrease fan shaft and reinstall fan guard. If the two readings are not reasonably close. If fan motor must be removed for service or replacement. SPACE TEMPERATURE ACCESSORY OR DUAL CHILLER LWT EVAPORATOR ENTERING FLUID TEMP J8 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 EVAPORATOR LEAVING FLUID TEMP B C A B C A B C A B C A + + + + - DPTB transducer.3 N-m).2 v. 54 Condenser Fans — Each fan is supported by a formed wire mount bolted to a fan deck and covered with a wire guard. If necessary.eps in job folder (WIP) SPTB DPTA Motormaster® V Controller — The optional or accessory Motormaster V controller uses an input signal from the AUX board. Figure 62 shows the proper position of mounted fan. Failure to comply could result in possible personal injury. Failure to comply could result in possible personal injury. METAL FANS — The exposed end of fan motor shaft is protected from weather by grease and a rubber boot. WARNING When configured as shown below. first check supply voltage to the transducer. Supply voltage should be 5 vdc ± 0. switch any 2 power leads to reverse fan rotation. For proper performance. switch any 2 power leads to reverse fan rotation. . For proper performance. fan web should be 0. See Fig.eps in job folder (WIP) Fig. IMPORTANT: Check for proper fan rotation (counterclockwise when viewed from above). 63. suction (yellow) and discharge (red). Pressure readings should be within ± 15 psig. SPTA ACCSY DPT LVT LWT OAT RGT SEN SPT — — — — — — — — LEGEND Accessory Discharge Pressure Transducer Low Voltage Terminal Leaving Fluid Temperature Outdoor Air Temperature Sensor Return Gas Temperature Sensor Sensor Terminal Block Space Temperature Sensor Fig. WARNING Hazard of electrical shock! Wait three minutes after disconnecting incoming power before servicing drive. compare pressure reading displayed on the scrolling marquee display module against pressure shown on a calibrated pressure gauge. fan should be positioned such that it is securely seated on this step. 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 1 2 3 4 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 RED BLK RED BLK RED GRN BLK RED GRN BLK RED GRN BLK RED GRN BLK RED BLK RED BLK BLU BLU RED BLK RGTA fan height. The transducers operate on a 5 vdc supply.). replace the pressure transducer. No pressure transducer calibration is required. (See Fig. Failure to comply could result in equipment damage. Drive assembly includes externally mounted current limiting resistors.32 in. Capacitors retain charge after power is removed. The controller is factory configured and requires no field programming. be sure to regrease fan shaft and reinstall fan guard. and driven equipment. which requires a manual reset. See Table 23 for proper inputs. This is an EEPROM memory chip and is accessible from the front of the VFD. NOTE: If the display flashes “Er”. Change P05 to ‘01.MASTMMR. Press Mode. If communications are lost only while Motormaster V control is in operation. the MMV follows a 4 to 20 mA speed reference signal present on terminals 25 (+) and 2 (-). 64. it will change to the mode selected according to the inputs. This is configured under the Configuration menu M. It should not be removed with power applied to the VFD. Ensure unit is well grounded to eliminate ground currents along communication lines. GENERAL OPERATION — The speed varies in proportion to a 4 to 20 mA signal produced by the ComfortLink™ controls. Once the drive is powered. press the Mode key again to re-enter the PROGRAM mode (the parameter menu will be accessed at the parameter that was last viewed or changed before exiting). 5. press the Mode button to display the present parameter setting. and that it can be changed by using the up and down buttons. To change password: first enter the current password then change parameter P44 to the desired password.keypad’. This configuration menu also contains the gains and minimum speed for the motormaster control logic. Upper right decimal point blinks. press the Mode button. Damage to the drive will result. 55 . 63. DRIVE PROGRAMMING CAUTION It is strongly recommended that the user NOT change any programming without consulting Carrier service personnel. LOSS OF CCN COMMUNICATIONS — Carrier Comfort Network® (CCN) communications with external control systems can be affected by high frequency electrical noise generated by the Motormaster V control. cF. Use the and buttons to scroll to the password value (the factory default password is “111”) and press the Mode button. 2. F2-F9. Press Mode to store new setting. Do not continuously cycle input power to the drive more than once every two minutes. Use the and buttons to scroll to the desired parameter number. or Fo faults). Once the desired parameter number is found. The display will read “00” and the upper right-hand decimal point will be blinking. GF. In these configurations. order a signal isolator (CEAS420876-2) and power supplies (CEAS221045-01. If the Mode key is pressed within two minutes of exiting the PROGRAM mode. and T3! Severe damage to the drive will result. which indicates that the PROGRAM mode has been accessed at the beginning of the parameter menu (P01 is the first parameter). The upper right-hand decimal point will begin blinking. This will activate the PASSWORD prompt (if the password has not been disabled). If all three restart attempts are unsuccessful. the password must be entered in order to access the parameters again. Once the correct password value is entered. the password is not required to access the parameters. Push UP and DOWN arrow key to set manual speed. See Fig. the password was incorrect. 3. To disable automatic control mode and enter manual speed control mode: 1. Press Mode to display present parameter number.S and selecting “YES”. 3. F1. Fault Codes — The drive is programmed to automatically restart after a fault and will attempt to restart three times after a fault (the drive will not restart after CF. Display reads “00”. Pressing the Mode will store the new setting and also exit the PROGRAM mode. (See Fig. indicating that the present parameter setting is being displayed.4-20mA control’ to restore 4 to 20 mA control. The MMV output speed is displayed in Hz. To change another parameter. T2. the display will read “P01”. The 38AP units use operating modes 5-8. Set P05 to ‘04 .) 4. Unit damage may occur from improper programming. To enter password and change program values: 1. Use and to change setting. 2. and the process to enter the password must be repeated. The ComfortLink controls must be configured for MMV operation in order for it to operate. Upper right decimal point blinks. To enter the PROGRAM mode to access the parameters. EPM CHIP — The drive uses a electronic programming module (EPM) chip to store the program parameters. CONFIGURATION — The MMV is configured for 1 of 12 operation modes based on the inputs to the control terminal block. 2 required) for the CCN communication line. One additional jumper is required to configure the drive for 50/60 Hz operation and input voltage. the drive will trip into FAULT LOCKOUT (LC). After two minutes.CAUTION DO NOT connect incoming AC power to output terminals T1. Check line voltage — set P01 appropriately Output Transistor Fault: Phase to phase or phase to ground short Reduce boost or increase acceleration values. it can trip into a CURRENT OVERLOAD fault (PF). Check settings for PXX. high. Restore factory defaults P48. LIMIT setting (Parameter 25) and the drive is reducing the output Check for faulty condenser fan motor. Low DC Bus Voltage Fault: Line voltage is too low. Control Fault: A blank EPM. 56 . Cooling fan has failed (if equipped). Either remove the EPM or perform a factory reset (Parameter 48) to change the parameter version of the EPM to match the parameter version of the drive. Acceleration rate is too fast. Internal Faults: The control board has sensed a problem Consult factory Feedback signal is above set point Check for proper set point Check liquid line pressure Start jumper is missing Feedback signal is below set point and fan is at minimum speed Feedback or speed signal lost. Serial Fault: The watchdog timer has timed out.L1 L2 L3 Mode DANGER LEGEND MMV — Motormaster V Control MMV TERMINAL BLOCK T1 T2 T3 BB+ BUTTONS DISPLAY Mode Fig.Check Parameter P25 from Table 23 is set correctly. If the drive remains in CUR. Feedback voltage displayed on P-69. replace EPM. T2. CURRENT LIMIT: The output current has exceeded the CURRENT Check for loose electrical connections. Check for dirty coils Check for motor bearing failure Single-phase Fault: Single-phase input power has been applied to a Check input power phasing three-phase drive. Boost settings are too unsuccessful. EPM Fault: The EPM is missing or damaged. indicating that the Check serial connection (computer) serial link has been lost. If that does not work. High DC Bus Voltage Fault: Line voltage is too high. Current Overload Fault: VFD is undersized for the application. SOLUTION Check cooling fan operation CL GF HF JF LF OF PF SF F1 F2-F9. If circuit on the output. Incompatibility Fault: An EPM with an incompatible parameter version has been installed.0 even though it is cold outside and it should be running slower Drive display = ‘---’ even though drive should be running Drive display = 8. Drive will operate at 57 Hz until reset or loss of start command. see section above.0 even though fan should be running faster VFD flashes 57 and LCS Perform a factory reset using Parameter 48 — PROGRAM SELECTION. Check for incorrect wiring T1. or an EPM with corrupted data has been installed. Check settings in communication software to match PXX. Resetting requires cycling start command (or power). Replace start jumper. 63 — Motormaster® V Mode Buttons and Mode Display Table 22 — Fault Codes FAULT CODE AF CF cF DESCRIPTION High Temperature Fault: Ambient temperature is too high. Pin 5 (feedback) should be somewhere between 0 and 5 v. See section above Check for proper set point Check liquid line pressure In stand alone mode: Check transducer wiring and feedback voltage. Deceleration Check line voltage — set P01 appropriately rate is too fast. RENT LIMIT too long. Data Fault: User data and OEM defaults in the EPM are corrupted. Overhauling load. Pin 6 should be 5 v output. Check line voltage — set P01 appropriately Mechanical problem with the driven equipment. Fo Drive display = 60. Failed output transistor. frequency to reduce the output current. T3. replace drive. 460. 575 VOLT ONLY 208 VOLT ONLY FR1 21 14 14 400 VOLT ONLY AUX FB FR MM OFM TB — — — — — — LEGEND Auxiliary Fuse Block Fan Relay Motormaster Outdoor Fan Motor Terminal Block Configuration Table MODE 5 6 7 8 NOMINAL VOLTAGE 208/230/460/575* 208/380 230 380/415 Hz 60 60 50 50 CONTROL INPUT (PINS 25.MOTORMASTER V TERMINAL BLOCK 1 2 5 6 11 12 2 14 13A 13B 13C 15 25 2 RED BLK FR1 21 14 FR1 21 208/230. Fig. 64 — Typical Motormaster® Wiring 57 . 2) External control 4-20 mA External control 4-20 mA External control 4-20 mA External control 4-20 mA START JUMPER TB1-TB2 TB13A-TB2 TB13B-TB2 TB13C-TB2 *208-v can run in mode 5 or 6. 0 12. Used when PID disabled and 4-20 mA input Clear history? 01 = maintain.0 12. TB12-2 closed Preset spd 6 default Preset spd 7 default Skip bandwidth Speed scaling Frequency scaling 50 or 60 Hz Load scaling: default (not used so NA) Accel/decel #2: default (not used so NA) Serial address Password:111 Speed at min signal: 8 Hz used when PID disabled and 4-20 mA input Speed at max feedback: 60 or 50 Hz.6 0 0 0 0 60 200 60 1 111 8 60 01 06 01 0 50 4 . TB12-2 open Preset spd 5 default – R134a setpoint. 02 = 6 kHz. 03 = reverse only Acceleration time: 10 sec Deceleration time: 10 sec DC brake time: 0 DC BRAKE VOLTAGE 0% Min freq = 8 Hz ~ 100 . 03=8 kHz Start-up mode: flying restart Stop mode: coast to stop Standard Speed source: 04=4-20 mA. 06=R134a TB-14 output: 01 = none TB-30 output: 01 = none TB-31 Output: 01 = none TB-13A function sel: 01 = none TB-13B function sel: 01 = none TB-13C function sel: 01 = none TB-15 output: 01 = none Control: 01 = Terminal strip Serial link: 02 = enabled 9600.2 5 0 0 MODE 8 02 01 06 01 04 01 01 01 01 01 01 01 01 02 02 01 10 10 0 0 8 50 110 100 50 0. 05=R22.8.5% at low frequencies Accel boost: 0% Slip compensation: 0% Preset spd #1: 0 Preset spd #2: 0 Preset spd #3: 0 Preset spd 4 default – R22 setpoint.5 0 0 47 0 0 18.0 12.5 0 0 57 0 0 18.Table 23 — Motormaster® V Program Parameters for Operating Modes PARAMETER P01 P02 P03 P04 P05 P06 P08 P09 P10 P11 P12 P13 P14 P15 P16 P17 P19 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P30 P31 P32 P33 P34 P35 P36 P37 P38 P39 P40 P41 P42 P43 P44 P45 P46 P47 P48 P61 P62 P63 P64 P65 P66 P67 P68 DESCRIPTION Line Voltage: 01 = low line.0 12. (set to 00 to clear) Program selection: Mode 1 – 12 PI Mode: 05= reverse.2 5 0 0 MODE 6 02 01 06 01 04 01 01 01 01 01 01 01 01 02 02 01 10 10 0 0 8 60 125 100 60 0.5 0 0 47 0 0 18.2 5 0 0 MODE 7 01 01 06 01 04 01 01 01 01 01 01 01 01 02 02 01 10 10 0 0 8 50 110 100 50 0.2 5 0 0 LEGEND NA — Not Applicable PID — Proportional Integral Derivative TB — Terminal Block 58 . 02 = high line Carrier Freq: 01 = 4 kHz.6 0 0 0 0 50 200 60 1 111 8 50 01 07 01 0 50 4 .6 0 0 0 0 60 200 60 1 111 8 60 01 05 01 0 50 4 . 01 = no PID Min feedback = 0 (0V *10) Max feedback = 50 (5V * 10) Proportional gain = 4% Integral gain = .5 0 0 57 0 0 18.N.2 PI accel/decel (setpoint change filter) = 5 Min alarm Max alarm MODE 5 01 01 06 01 04 01 01 01 01 01 01 01 01 02 02 01 10 10 0 0 8 60 125 100 60 0. 0-5V.6 0 0 0 0 50 200 60 1 111 8 50 01 08 01 0 50 4 .160 rpm Max freq Current limit: Motor overload: 100 Base freq: 60 or 50 Hz Fixed boost: 0.2 with timer Units editing: 02 = whole units Rotation: 01 = forward only. The collective group is displayed through parameters 50-56 and all values are read only. Carefully check all wiring connections before restoring power. Failure to follow this warning can cause a fire. The MMV should follow the 4 to 20 mA signal from the ComfortLink™ controls. Verify the ENABLE/OFF/REMOTE CONTACT switch is in the OFF position. Table 24 — Controller Cross-Reference CONTROL VH. 2. set points and schedules. and removing the module from the control box. Jobsite conditions may dictate that maintenance schedule is performed more often than recommended. Carefully disconnect all wires from the defective module by unplugging its connectors. Usually rated input voltage x 1. 59 MAINTENANCE Recommended Maintenance Schedule — The following are only recommended guidelines. 8. resulting in personal injury or death. Variables VH. 7. P56 in Motormaster V shows 4-20 mA input in percent of maximum input. • P54: LOAD — in percent of drives rated output current rating • P55: VDC INPUT — in percent of maximum input: 50 will indicate full scale which is 5 v • P56: 4-20 mA INPUT — in percent of maximum input: 20% = 4 mA. Verify that all module red LEDs blink in unison. VH. 1. CAUTION Electrical shock can cause personal injury. The speed command from the ComfortLink controls can be monitored in 2 ways: 1. verify that all configuration data is correct.given as a percentage of 4 to 20 mA range. Verify that all green LEDs are blinking and that the scrolling marquee or Navigator display is communicating correctly. Verify all configuration information. OIL CHARGE — Compressors are factory charged with 110 oz of POE oil. Refer to Oil Charge section page 47 for proper oil and charge procedure. If the main base board (MBB) has been replaced. Package the defective module in the carton of the new module for return to Carrier.PB in the "outputs" submenu of ComfortLink . 2.PB SIGNAL (COMFORTLINK) 4 mA 12 mA 20 mA 0% 50% 100% 4-20 mA INPUT (P56. This information is needed later in this procedure. 9. MOTORMASTER V) 20% 60% 100% VFD SPEED (MOTORMASTER V) 8 Hz 26 Hz 60 Hz 5. COMPRESSOR REPLACEMENT — To change out a faulty compressor. Refer to the Start-Up Checklist for 38AP units (completed at time of original start-up) found in the job folder. OPT1 and OPT2 are correct. CAUTION Do not manually operate contactors. 3. Restore control power. SLCT sub-modes) should also be verified as well as any specific time and maintenance schedules. 6. Reinstall all module connectors. Save the screws for later use. 4. Failure to follow this warning can cause fire. Refer to Table 24 for the variable definitions of each controller. Check that all power to unit is off. settings. For accessory Navigator™ device replacement. make sure the plug is installed at LVT in the LEN connector. Return the ENABLE/OFF/REMOTE CONTACT switch to its previous position. Mount the new module in the unit’s control box using a Phillips screwdriver and the screws saved in Step 2. Wear safety glasses and gloves when handling refrigerants. resulting in personl injury or death.4. Verify that the instance jumper (MBB) or address switches (all other modules) exactly match the settings of the defective module.PA.TROUBLESHOOTING — Troubleshooting the Motormaster® V control requires a combination of observing system operation and VFD display information. NOTE: Handle boards by mounting standoffs only to avoid electrostatic discharge. fill out the current information in the Configuration mode on a new checklist. Any additional field-installed accessories or options (RSET. (with Software) 38AP501672 HK50AA031 30GT515218 HK50AA033 HK50AA027 32GB500442EE The MMV also provides real time monitoring of key inputs and outputs. 10. Disconnect all electrical power before servicing. • P50: FAULT HISTORY — Last 8 faults • P51: SOFTWARE version • P52: DC BUS VOLTAGE — in percent of nominal. Table 25 — Replacement Modules MODULE Main Base Board (MBB) Scrolling Marquee Display Energy Management Module (EMM) Navigator Display Compressor Expansion Board Auxiliary Board REPLACEMENT PART NO. If the checklist does not exist.PA. Correct any of the problems described below before installing and running a replacement compressor. Serious damage to the machine may result. VH. Remove the defective module by removing its mounting screws with a Phillips screwdriver. Tailor the various options and configurations as needed for this particular installation. refer to the compressor replacement procedure included with the new compressor. 100% = 20 mA REPLACING DEFECTIVE MODULES — The ComfortLink™ replacement modules are shown in Table 25. WARNING Exercise extreme caution when reading compressor currents when high-voltage power is on. Compressors WARNING Do not supply power to unit with compressor cover removed. . Follow the Configuration mode table and verify that all items under sub-modes UNIT. Place the switch in the ENABLE position for local switch control or in the REMOTE CONTACT position for control through remote contact closure. If there is a command for a compressor to run and there is no current. THERMISTOR FAILURE — If a thermistor fails in either an open or shorted condition. Every 12 months: • Check all electrical connections. • Check accuracy of thermistors. CAUTION If unit stoppage occurs more than once as a result of any of the safety devices listed. High-Pressure Switch Trip — The high pressure switch has opened. but must be reset manually by resetting the alarm with the scrolling marquee as shown in Table 27. Unit restarts when required to satisfy set point. repair as necessary. Elimination of contamination and removal of harmful residues will greatly increase the life of the coil and extend the life of the unit. 3.) Refer to Fig. Put on personal protective equipment including safetyglasses and/or face shield. then one of the following safeties or conditions have turned the compressor off: Compressor Overcurrent — All compressors have internal line breaks or a motor protection device located in the compressor electrical box. Remove any foreign objects or debris attached to the coreface or trapped within the mounting frame and brackets. determine and correct cause before attempting another restart. Below are the factory settings for the fixed high pressure switch. TROUBLESHOOTING Complete Unit Stoppage and Restart — Possible causes for unit stoppage and reset methods are shown below. Routine cleaning of coil surfaces is essential to maintain proper operation of the unit. 65. potable water is authorized for cleaning condenser coils. Compressor Motor Over Temperature — The internal linebreak or over temperature switch has opened. 2. the unit will be shut down. • Check moisture indicating sight glass for possible refrigerant loss and presence of moisture. • Obtain and test an oil sample. the unit will stop immediately. The nozzle must be at least 12 in. CAUTION Excessive water pressure will fracture the braze between air centers and refrigerant tubes. • Check all refrigerant joints and valves for refrigerant leaks. Compressor Short Circuit — There will not be current if the compressor circuit breaker that provides short circuit protection has tripped. These cleaners can accelerate corrosion and damage the coil. • Check crankcase heater operation. Restart is automatic after MBB start-up cycle is complete. waterproof clothing and gloves. • Check condenser coils for debris. Do not exceed 900 psig or 30 degree angle. UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS OFF — When the switch is OFF. COOLING LOAD SATISFIED — Unit shuts down when cooling load has been satisfied. • Check fan status switch operation. • Inspect all contactors and relays. • Perform service test to confirm operation of all components. Only clean. A label located above the terminal box identifies models that contain this technology. ASTP Protection Trip — All non-digital Copeland compressors are equipped with an advanced scroll temperature protection (ASTP). 60 . replace as necessary. Reset circuit breaker(s). reset is automatic by closing the fan status input. GENERAL POWER FAILURE — After power is restored. replace if greater than ± 2° F (1. Unit restarts automatically. tighten as necessary. It is recommended to use full coverage clothing. FAN STATUS INPUT OPEN — After the problem causing the fan status input to be open has been corrected. Each board senses the presence or absence of current to each compressor. Start high pressure water sprayer and purge any soap or industrial cleaners from sprayer before cleaning condenser coils. from the core face. clean as necessary. • Check compressor oil level. replace as necessary. (See Table 26 also. COMPRESSOR SAFETIES — The 38AP units with ComfortLink™ controls include a compressor protection board that protects the operation of each of the compressors. OPEN 24-V CONTROL CIRCUIT BREAKER(S) — Determine the cause of the failure and correct. 1-3 and 8-17 for component arrangement and control wiring diagrams. Every 3 months: • Check refrigerant charge. 38AP UNIT SIZE 025-100 CUTOUT psig 650 kPa 4482 psig 500 CUT-IN kPa 3447 Microchannel Heat Exchanger (MCHX) Condenser Coil Maintenance and Cleaning Recommendations CAUTION Do not apply any chemical cleaners to MCHX condenser coils. restart is automatic through normal MBB start-up. • Check all condenser fans for proper operation. • Check condition of condenser fan blades and ensure they are securely fastened to the motor shaft. 4.Every month: • Check condenser coils for debris. • Check refrigerant filter driers for excessive pressure drop. Clean condenser face by spraying the core steady and uniformly from top to bottom while directing the spray straight toward the core. Change oil only if necessary. See Fig. The following steps should be taken to clean MCHX condenser coils: 1. Replace SAT or RAT as required.2° C) variance from calibrated thermometer. Reduce pressure and use caution to prevent damage to air centers. If the password has been changed. The module output is a normally closed contact that is wired in series with the compressor contactor coil. NOTE: Various factors. The module is powered with 24 vac from the units main control box. At this temperature. The control ensures proper oil return by insuring a circuit does not operate with one compressor for longer than one hour of cumulative run time. 66 for approximate reset times. The following method must be used to reset manual alarms (refer to Table 27): Before resetting any alarm. These alerts occur when the current sensor (CS) does not detect compressor current during compressor operation. Temperature sensors embedded in the compressor motor windings are the inputs to the module. or fault conditions. which occurs up to 90 minutes later. This alert can only occur on single circuit unit sizes 040-060 and three compressor circuit unit sizes 70100. B1. enter the Alarm mode indicated by the LED on the side of the scrolling marquee display. A2. Suction and discharge pressures balance while the motor continues to run. Press ENTER . In this case. To avoid permanent damage. the longer it must cool before the bi-metal disk resets. Outdoor fans will continue to operate. a special mode. 61 Recommended Cooling Time (Minutes) . After determining and correcting the cause of the alarm. The longer the compressor runs unloaded. contact opens. The other stages of fan will be turned on as required by SCT. T057 (Circuit B Compressor Failures) — Alert codes 051. use the arrow keys to change each individual character. 1111. first determine the cause of the alarm and correct it. In a compressor motor overload condition. deenergizing the compressor contactor. POSSIBLE CAUSES Compressor Overload — Either the compressor internal overload protector is open or the external overload protector (Kriwan module) has activated. and the presence of a sound blanket will increase cool-down times. Compressor Stuck on Control. 052. These alerts occur when two compressors are unavailable to run on a 3 compressor circuit.4 C). An alarm will then be enabled to indicate that service is required. See Fig. which may take up to 2 hours. and B3 respectively. Fig. which will cause the compressor to trip on its overload protection device.Low Saturated Suction — Several conditions can lead to low saturated suction alarms. Advanced scroll temperature protection will reset automatically before the motor protector resets. COMPRESSOR FAILURE ALERTS T051. the motor will run until the motor protector trips. If the current sensor board reads OFF while the compressor relay has been commanded ON. The control will prompt the user for a password. an internal bi-metal disk valve opens and causes the scroll elements to separate. high ambient temperature. low refrigerant charge and plugged filter driers are the main causes for this condition. Toggle the display to “YES” and press ENTER . Press ENTER and until the sub-menu item RCRN “RESET ALL CURRENT ALARMS” is displayed. The external overload protector modules are mounted in the compressor wiring junction box. which stops compression. will be enabled and all other compressors will be turned off. When this occurs. T056. 120 110 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 Compressor Unloaded Run Time (Minutes) *Times are approximate. and may cause either one circuit or the whole unit to shut down. 66 — Recommended Minimum Cool Down Time After Compressor is Stopped* DIAGNOSTIC ALERT CODES AND POSSIBLE CAUSES T048 (Circuit A Compressor Availability Alert) T049 (Circuit B Compressor Availability Alert) — Alert codes 048 and 049 are for circuits A and B respectively. Circuit Breaker Trip — The compressors are protected from short circuit by a breaker in the control box. If the compressor is commanded OFF and the current sensor reads ON. the control turns off the compressor. This will indicate that a compressor contactor has failed closed. Alarms and Alerts — These are warnings of abnormal Fig. The alarms will be reset. T052. 65 — Advanced Scroll Temperature Protection Label Advanced scroll temperature protection is a form of internal discharge temperature protection that unloads the scroll compressor when the internal temperature reaches approximately 300 F. T053 (Circuit A Compresser Failures) T055. 053. If the compressor is not stopped. the compressor ASTP device will open. The first outdoor fan stage is turned on immediately. Alarms will also occur if the current sensor board malfunctions or is not properly connected to its assigned digital input. Press ENTER to display the default password. the control will use a Compressor Minimum OFF Time of 2 minutes or a Compressor Minimum ON Time of 3 minutes. by displaying PASS and WORD. Low Refrigerant Charge — If the compressor operates for an extended period of time with low refrigerant charge. the compressor should be stopped and allowed to cool. Automatic alarms will reset without operator intervention if the condition corrects itself. If discharge temperature exceeds 265 F (129. They are assigned code numbers as described in Table 26. The controls have several override modes built in which will attempt to keep the unit from shutting down. an alert is generated. A3. B2. 55. Compressor Time Guards — For compressors. High Discharge Gas Temperature Protection — Units equipped with digital compressors have an additional thermistor located on the discharge line. do NOT repeatedly reset these alert and/or alarm conditions without identifying and correcting the cause(s). the digital compressor will be shut off. an alert is generated. including high humidity. 56 and 057 are for compressors A1. Low airflow. Press ENTER for each character. To manually reset ASTP. 3. incorrect safety wiring. These alerts occur when the pressure is outside the range of 0. Place the unit in Service Test mode. The high saturated suction alert is generated and the circuit is shut down. the return-air temperature must be updated every 3 minutes. Return to Normal mode and observe compressor operation to verify that compressor current sensor is working and condenser fans are energized. Failure of this thermistor will disable any elements of the control which requires its use. or a loose connection. the control will command the condenser fans to maintain normal head pressure. To check out alerts T051-T057: 1. If the supply temperature is being written to by CCN or a third party 62 control. Verify CS wiring. IMPORTANT: If the CS is always detecting current. When this occurs. If the unit is configured for SPT 2 stage or SPT multi-stage operation and the sensor fails. The cause of the alarm is usually a faulty thermistor. 3. verify it is rotating in the correct direction. T69 (Circuit A. The cause of the alarm is usually a faulty thermistor. T110 (Circuit A Loss of Charge) T111 (Circuit B Loss of Charge) — Alert codes 110 and 111 are for circuits A and B respectively. the control turns off the compressor. a shorted or open thermistor caused by a wiring error. A3. The cause of the alert is usually a faulty transducer.B Compressor Return Gas Temperature Thermistor Failure) — This alert occurs when the compressor return gas temperature sensor is outside the range of –40 to 245 F (–40 to 118 C). If the compressor is off and there is no current. or a loose connection. If it is not updated. This is done to facilitate a service technician forcing a relay to test a compressor. T112 (Circuit A High Saturated Suction Temperature) T113 (Circuit B High Saturated Suction Temperature) — Alert codes 112 and 113 occur when compressors in a circuit have been running for at least 5 minutes and the circuit saturated suction temperature is greater than 70 F (21. Use the scrolling marquee to reset the alert. A060 (Supply Air Thermistor Failure) — If the unit is required to use the supply air thermistor input (C. A057 — Alarm codes 051. verify the CS wiring and replace if necessary. faulty 5-v power supply. check the contactor and the relay on the MBB.1 C). 2. an alarm is generated. To check out alarms A051-A057: 1. In addition. A2. COMPRESSOR STUCK ON FAILURE ALARMS Circuit A A051. B1. the circuit will be shutoff. A circuit cannot run when this alert is active. T090 (Circuit A Discharge Pressure Transducer Failure) T091 (Circuit B Discharge Pressure Transducer Failure) — Alert codes 090 and 091 are for circuits A and B respectively. T068.0 to 420. certain diagnostics will take place as follows: 1. a shorted or open thermistor caused by a wiring error. A circuit cannot run when this alert is active. A056. The cause of the alert is usually low refrigerant charge or a faulty thermistor. open internal protection. then most likely the problem is one of the following: HPS open. IMPORTANT: Prolonged operation in the wrong direction can damage the compressor.TYP 1.TYP 1. A061 (Return Air Thermistor Failure) — If the unit is required to use the return air thermistor input (C. If any of the compressors are diagnosed as stuck on and the current sensor board is on and the request is off. Use the scrolling marquee to reset the alert. or incorrect compressor wiring. 053. The cause of the alert is usually a faulty thermistor in the T55. Failure of this thermistor will disable any elements of the control which requires its use. A052. The possible causes include welded contactor or frozen compressor relay on the MBB. B2 and B3. If the compressor does start. verify that the compressor is on.0 psig. Failure of this thermistor will shut down the entire unit. 5. IMPORTANT: Return to Normal mode and observe compressor operation to verify that compressor current sensor is working and condenser fans are energized. These alerts occur when the pressure is outside the range of 0. T56. . Correct rotation can be verified by a gage set and looking for a differential pressure rise on start-up. Failure of this thermistor will disable any elements of the control which requires its use. These alarms occur when the current sensor (CS) detects current when the compressor should be off.0 to 667. 052. the supply-air temperature must be updated every 3 minutes. The alert will reset itself when discharge temperature is less than 250 F (121. 056 and 057 are for compressors A1. These alerts occur when the compressor is OFF and the suction pressure is less than 26 psig. and 9) and the sensor reading is outside the range of –40 to 245 F (–40 to118 C) then the alarm will occur. If there is 24 v at the contactor. T074 (Space Temperature Thermistor Failure) — This alert occurs when the space temperature sensor is outside the range of –40 to 245 F (–40 to 118 C). check relay on MBB and wiring. faulty 5-v power supply. then the alarm will be generated. Failure of this thermistor will shut down the entire unit.Wiring Error — A wiring error might not allow the compressor to start. 3. If the compressor does not start. T092 (Circuit A Suction Pressure Transducer Failure) T093 (Circuit B Suction Pressure Transducer Failure) — Alert codes 092 and 093 are for circuits A and B respectively. 055. If it is not updated. or a loose connection. 2. If the compressor is on. T073 (Outside Air Temperature Thermistor Failure) — This alert occurs when the outside air temperature sensor is outside the range of –40 to 245 F (–40 to 118 C). Turn on the compressor in question using Service Test mode. All compressors should be off. circuit breaker trip. or T58 device. Check for welded contactor. If discharge gas temperature is open or shorted.0 psig. and 9) and the sensor reading is outside the range of –40 to 245 F (–40 to 118 C) then the alarm will occur. 5. no cooling mode may be chosen. T094 (Discharge Gas Thermistor Failure) — This alert occurs for units which have the digital compressor installed on circuit A. The cause of the alert is usually a faulty transducer. If the return temperature is being written to by CCN or a third party control. or a loose connection. Verify that there is not 24-v at the contactor coil. then the alarm will be generated. These alarms are only monitored for a period of 10 seconds after the compressor relay has been commanded OFF. 2.1 C). if a compressor stuck failure occurs and the current sensor board reports the compressor and the request off. If the current sensor board reads ON while the compressor relay has been commanded OFF for a period of 4 continuous seconds. 4. 5. or a loose connection. The control will shut off all other compressors. A053 Circuit B A055. a shorted or open thermistor caused by a wiring error. This alarm may be disabled once the reverse rotation check has been verified by setting REV. This failure follows a 3 strike methodology whereby the first two times a circuit goes down entirely. then there is a reverse rotation error. or a faulty high-pressure switch. When SSTA or SSTB is less than 20 F (–6. or less than –20 F (–28. then another compressor will be shut down until the last compressor on the circuit is shut down at which time an alert or alarm will be issued (T120. The cause of the alert is usually low refrigerant charge or a faulty thermistor. high outdoor ambient temperature coupled with dirty outdoor coil. A154 (Serial EEPROM Hardware Failure) — A problem has been detected with the EEPROM on the MBB. on power up. Try resetting the power and check the indicator lights. one compressor of the affected circuit will be shut down with a local alert (P120. If the alert continues. • Dual thermostat and switch demand limit configure • AUX board incorrect revision. This alarm indicates the unit is at 0% capacity.8 C). the control will shut down one compressor on a circuit if that circuit's saturated condensing temperature is greater than 145 F (62. If discharge gas temperature is greater than 268 F (131.1 C). The suction pressure of both circuits is sampled 5 seconds before the compressor is brought on. the circuit will be shut off. If the alarm continues. • Unit configuration set to invalid type. T121. the A118 alarm will be generated and the alarm must be reset manually. If there are 1 or 2 strikes on the circuit and the circuit recovers for a period of time.8 C) for 5 continuous minutes. Try resetting the power and check the indicator lights. T122 (Circuit A High Pressure Trip) T123 (Circuit B High Pressure Trip) — Alert codes 122 and 123 are for circuits A and B respectively. the board should be replaced. the board should be replaced. If SCT 63 continues to rise to greater than 150 F (65.25. A157 (A/D Hardware Failure) — A problem has been detected with A/D conversion on the boards. If recovery occurs. less than 0° F (–17. P120 (Circuit A Low Saturated Suction Temperature — Compressor Shutdown) T120 (Circuit A Low Saturated Suction Temperature Alert) A120 (Circuit A Low Saturated Suction Temperature Alarm) P121 (Circuit B Low Saturated Suction Temperature — Compressor B2 Shutdown) T121 (Circuit B Low Saturated Suction Temperature Alert) A121 (Circuit B Low Saturated Suction Temperature Alarm) — This alert or alarm is used to keep the evaporator from freezing and the saturated suction temperature above the low limit for the compressors. These alerts occur when the appropriate saturated condensing temperature is greater than 150 F (65. This alarm will disable mechanical cooling and will require manual reset. 2. or less than –20 F (–28. With the above information. the board should be replaced.7 C) for 4 minutes. A150 (Unit is in Emergency Stop) — If the CCN emergency stop command is received. A121) will be generated which will necessitate a manual reset to get the circuit back running.6 C). If this alert occurs 3 times within a day. The unit control determines failure as follows: 1.2 C) for 2 minutes. Try resetting the power and check the indicator lights.T114 (Circuit A Low Superheat) T115 (Circuit B Low Superheat) — Alert codes 114 and 115 occur when the superheat of a circuit is less than 5 F (2. the test for reverse rotation is made.2 C) for 2 minutes. The third time this happens. A120." A151 (Illegal Configuration) — An A151 alarm indicates an invalid configuration has been entered. Prior to the alert. T155 (Serial EEPROM Storage Failure Error) — A problem has been detected with the EEPROM storage on the MBB. The control must have saturated suction temperature greater than or equal to 34 F (1. Try resetting the power and check the indicator lights. A152 (Unit Down Due to Failure) — Both circuits are off due to alerts and/or alarms.8 C) for 1 minute. • Dual thermostat configured for single-circuit unit.R = Yes. for suction pressure change on the first activated circuit. If the alarm continues.32 F (–1.1 C). less than 0° F (–17. A140 (Reverse Rotation Detected) — A test is made once. 4. staging will be allowed on the circuit again. plugged filter drier. . it is possible to clear out the strikes thereby resetting the strike counter automatically. the board should be replaced. a 10-minute hold off timer must elapse and the saturated suction temperature must rise above 29. an alert will be generated (T120. the unit will shut down immediately and broadcast an alarm back to the CCN.7 C) for 4 minutes. If the suction pressure change 5 seconds after compression is greater than the suction pressure change 5 seconds before compression – 1. The following are illegal configurations.9 C) for 20 seconds continuously.8 C) for 1 minute. To recover from these alerts. If the CCN point name "EMSTOP" in the system table is set to emergency stop. The low superheat alert is generated and the circuit is shut down. The rate of suction pressure change from 5 seconds before the compressor is brought on to when the compressor is brought on is calculated.9 C) for 20 seconds continuously. the board should be replaced.5 C). Try resetting the power and check the indicator lights. If the alarm continues. P121) and a 10-minute time guard will be added to the compressor. This alarm will clear when the variable is set back to "enable. A156 (Critical Serial EEPROM Storage Failure Error) — A problem has been detected with the EEPROM storage on the MBB. the alarm is generated and the unit will be immediately stopped. less than 10 F (–12. Therefore. less than 10 F (–12. The alert will reset itself when discharge temperature is less than 250 F (121. T153 (Real Time Clock Hardware Failure) — A problem has been detected with MBB real time clock hardware. an alarm (A120. The rate of suction pressure change from when the compressor is brought on to 5 seconds afterwards is calculated. Reset is automatic when all alarms are cleared.6 C). it is possible that multiple P120 or P121 alerts may be stored in the alarm. right when the compressor is brought on and 5 seconds afterwards. T118 (High Discharge Gas Temperature Alert) A118 (High Discharge Gas Temperature Alarm) — This alert or alarm occurs for units which have the digital compressor installed on circuit A. If the alarm continues. • Invalid unit size has been entered. indicating that the unit is down. A121). If saturated suction temperature continues to be less than 20 F (–6. 3. the alert will occur and the circuit's remaining compressor will shut down. T126 (Circuit A High Head Pressure) T127 (Circuit B High Head Pressure) — Alert codes 126 and 127 are for circuits A and B respectively. The cause of the alarm is usually an overcharged system.1 C) for 60 minutes in order to reset the strike counters. T121) which keeps the circuit off for 15 minutes before allowing the circuit to try again. reset and capacity input.B2.0 to 667. The input value is either less than 2 mA or greater than 22 mA. A173 (Energy Management Module Communication Failure) — This alarm indicates that there are communications problems with the energy management.A3 Failure Circuit B Compressor B1. A052. A2. B2.B3 Failure Supply Air Thermistor Failure Supply Air Temperature Update not received Return Air Thermistor Failure Return Air Temperature Update not received Circuit A Return Gas Thermistor Failure Circuit B Return Gas Thermistor Failure Outside Air Thermistor Failure Space Temperature Thermistor Failure Circuit A Discharge Pressure Transducer Failure Circuit B Discharge Pressure Transducer Failure Circuit A Suction Pressure Transducer Failure Circuit B Suction Pressure Transducer Failure Discharge Gas Thermistor Failure — — — — — WHY WAS THIS ALARM GENERATED? Two compressors on circuit failed Two compressors on circuit failed Respective current sensor board (CSB) feedback signal does not match relay state Respective current sensor board (CSB) feedback signal does not match relay state Respective current sensor board (CSB) feedback signal is ON when the compressor should be off Respective current sensor board (CSB) feedback signal is ON when the compressor should be off Thermistor outside range of –40 to 245 F (–40 to 118 C) Temperature not updated during 3 minutes Thermistor outside range of –40 to 245 F (–40 to 118 C) Temperature not updated during 3 minutes Thermistor is outside range of –40 to 245 F (–40 to 118 C) Thermistor is outside range of –40 to 245 F (–40 to 118 C) Thermistor outside range of –40 to 245 F (–40 to 118 C) Thermistor outside range of –40 to 245 F (–40 to 118 C) The pressure is outside the range of 0. These alerts reset automatically. T052. The A200 alarm is for single circuit units. These alerts occur when the output of the current sensor (CS) is a constant high value. A3. and 505 are for compressors A1. Complete condenser coil cleaning and enter ‘YES’ for Coil Maintenance Done (C. T057 A051.A2.0 to 420. Unit runs under normal control/set points. The unit will be in an alert condition until the fan status switch is closed. If the problem cannot be resolved. B1. The input value is either less than 2 mA or greater than 22 mA. 504. The input value is either less than 2 mA or greater than 22 mA. T505 (Current Sensor Board Failure — B xx Circuit B) — Alert codes 500.0 psig The pressure is outside the range of 0. Circuit A shut down Circuit B shut down Circuit A shut down Circuit B shut down Digital compressor shut down.DN) expired. T177 (4 to 20 mA Demand Limit Input Failure) — This alert indicates a problem has been detected with demand limit 4 to 20 mA input. The alarm or alert is an automatic reset when the fan status switch closes. and B3 respectively.0 psig The pressure is outside the range of 0.0 psig Discharge thermistor (DTT) is either open or shorted Leaving Fluid Temperature Main Base Board Saturated Condensing Temperature Saturated Suction Temperature Thermostat ACTION TAKEN BY CONTROL Circuit shut down Circuit shut down Respective compressor shut down in Circuit A. T056.MN) item. 501. The alarm will automatically reset.0 psig The pressure is outside the range of 0. A200 (Fan Status Switch 1 Failure) T201 (Fan Status Switch 1 Failure) T202 (Fan Status Switch 2 Failure) — This alarm or alert indicates the fan status input 1 or 2 is open when the unit is ON. T174 (4 to 20 mA Cooling Set point Input Failure) — This alert indicates a problem has been detected with cooling set point 4 to 20 mA input. T502 (Current Sensor Board Failure — A xx Circuit A) T503. Unit shut down Unit shut down Unit shut down Unit shut down Unit shut down Unit shut down Circuit shut down Circuit shut down Temperature reset disabled.L. RESET METHOD Manual Manual Manual Manual Manual Manual Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic CCN CSB CXB DTT EEPROM EMM — — — — — LEGEND Carrier Comfort Network® LWT Current Sensor Board MBB Compressor Expansion Module SCT Discharge Temperature Thermistor SST Electrically Erasable Programmable TSTAT Read-Only Memory — Energy Management Module 64 . A057 A060 A060 A061 A061 T068 T069 T073 T074 T090 T091 T092 T093 T094 ALARM OR ALERT Alert Alert Alert Alert Alarm Alarm Alarm Alarm Alarm Alarm Alert Alert Alert Alert Alert Alert Alert Alert Alert DESCRIPTION Circuit A Compressor Availability Alert Circuit B Compressor Availability Alert Circuit A Compressor A1. T500. 502. which can include demand limit.L. T176 (4 to 20 mA Reset Input Failure) — This alert indicates a problem has been detected with reset 4 to 20 mA input. Temperature reset disabled. Table 26 — Alarm and Alert Codes ALARM/ ALERT CODE T048 T049 T051.0 to 667. A056.A170 (Loss of Communication with the Compressor Expansion Module) — This alarm indicates that there are communications problems with the compressor expansion. The reset function will be disabled when this occurs.A3 Failure Circuit B Compressor B1.B3 Failure Circuit A Compressor A1.B2. The reset function will be disabled when this occurs. Respective compressor shut down in Circuit B. which is required for unit sizes 070 to 100. T501. T303 (Condenser Coil Maintenance Due) — Coil Service Countdown (C. All functions performed by the EMM will stop. T053 T055. Unit runs under normal control/set points. A053 A055. The alarm will automatically reset.0 to 420. the CS board must be replaced. 503.A2. T504. Unit is not allowed to start. less than 10 F for 2 minutes. Circuit A shut down RESET METHOD Manual Manual Manual Manual Automatic after first daily occurance. Compressor A1 shut down Compressor A1 shut down Circuit A will remove one compressor stage. Circuit B is shut down after pumpdown complete.8 C) for 5 minutes. less than 0° F for 1 minute or less than –20 F for 20 seconds continuously SSTA is less than 20 F for 4 minutes.8 C) for 5 minutes. less than 0° F for 1 minute or less than –20 F for 20 seconds continuously and only one compressor running SSTB is less than 20 F for 4 minutes. Circuit B shut down P121 Alert Automatic Automatic unless 3rd strike. Unit shutdown without going through pumpdown.6 C) for 5 minutes Suction superheat is less than 5 F (2. manual thereafter Automatic Manual Automatic Automatic unless 3rd strike.6 C) for 5 minutes Circuit is on and saturated suction temperature is greater than 70 F (15. less than 10 F for 2 minutes. less than 0° F for 1 minute or less than –20 F for 20 seconds continuously SSTA is less than 20 F for 4 minutes.Table 26 — Alarm and Alert Codes (cont) ALARM/ ALERT CODE T110 T111 T112 T113 T114 ALARM OR ALERT Alert Alert Alert Alert Alert DESCRIPTION Circuit A Loss of Charge Circuit B Loss of Charge Circuit A High Saturated Suction Temperature Circuit B High Saturated Suction Temperature Circuit A Low Suction Superheat Circuit B Low Suction Superheat High Discharge Gas Temperature High Discharge Gas Temperature Circuit A Low Saturated Suction Circuit A Low Saturated Suction Circuit A Low Saturated Suction Circuit A Low Saturated Suction Circuit B Low Saturated Suction Circuit B Low Saturated Suction High Pressure Switch Trip Circuit A High Pressure Switch Trip Circuit B Circuit A High Discharge Pressure Circuit A High Discharge Pressure Circuit B High Discharge Pressure Circuit B High Discharge Pressure Reverse Rotation Detected Emergency Stop WHY WAS THIS ALARM GENERATED? If the compressors are off and discharge pressure reading is less than 26 psig for 30 sec. CCN CSB CXB DTT EEPROM EMM — — — — — LEGEND Carrier Comfort Network® LWT Current Sensor Board MBB Compressor Expansion Module SCT Discharge Temperature Thermistor SST Electrically Erasable Programmable TSTAT Read-Only Memory — Energy Management Module — — — — — Leaving Fluid Temperature Main Base Board Saturated Condensing Temperature Saturated Suction Temperature Thermostat 65 . Circuit not allowed to start. less than 10 F for 2 minutes. Circuit shut down Circuit shut down Circuit A is shut down after pumpdown complete. less than 10 F for 2 minutes. less than 0° F for 1 minute or less than –20 F for 20 seconds continuously and only one compressor running SSTB is less than 20 F for 4 minutes. less than 0° F for 1 minute or less than –20 F for 20 seconds continuously and only one compressor running High Pressure A Switch Input opento MBB High Pressure B Switch Input open to MBB SCTA >150 F SCTA >150 F SCTB >150 F SCTB >150 F Incoming unit power leads not phased correctly CCN emergency stop command received ACTION TAKEN BY CONTROL Circuit not allowed to start. manual thereafter Automatic after first daily occurance. Circuit is on and saturated suction temperature is greater than 70 F (15. T121 Alert A121 T122 T123 T126 A126 T127 A127 A140 A150 Alarm Alert Alert Alert Alarm Alert Alarm Alarm Alarm Circuit B shut down Circuit shut down Circuit shut down Circuit shut down Circuit shut down Circuit shut down Circuit shut down Unit shut down. Suction superheat is less than 5 F (2. less than 10 F for 2 minutes. Unit is unable to run. Manual Manual Manual Automatic. only after first 3 daily occurrences Manual Manual Automatic once CCN command for EMSTOP returns to normal Manual once configuration errors are corrected Automatic once alarms/alerts are cleared that prevent the chiller from starting. less than 10 F for 2 minutes. Manual Automatic. Manual T115 T118 A118 P120 T120 Alert Alert Alarm Alert Alert A120 Alarm Circuit A shut down Circuit B will remove one compressor stage. Discharge Thermistor (DTT) reading is greater than 250 F 3 Discharge Gas Temperature alarms occur within a day SSTA is less than 20 F for 4 minutes. less than 0° F for 1 minute or less than –20 F for 20 seconds continuously SSTB is less than 20 F for 4 minutes. A152 Alarm Unit Down Due to Failure Both circuits are down due to alarms/alerts. A151 Alarm Illegal Configuration One or more illegal configurations exists. If the compressors are off and discharge pressure reading is less than 26 psig for 30 sec. only after first 3 daily occurrences. Unit not allowed to start Circuit A is not allowed to run Circuit B is not allowed to run None Compressor A1 shut down Compressor A2 shut down Compressor A3 shut down Compressor B1 shut down Compressor B2 shut down Compressor B3 shut down RESET METHOD Automatic when correct clock control restarts. Complete condenser coil cleaning and enter ‘YES’ for Coil Maintenance Done (C. 4 to 20 mA set point disabled. Demand limit function disabled.L.Table 26 — Alarm and Alert Codes (cont) ALARM/ ALERT CODE T153 A154 T155 A156 A157 A170 A173 ALARM OR ALERT Alert Alarm Alert Alarm Alarm Alarm Alarm DESCRIPTION Real Time Clock Hardware Failure Serial EEPROM Hardware Failure Serial EEPROM Storage Failure Critical Serial EEPROM Storage Failure A/D Hardware Failure Loss of Communication with CXB Loss of Communication with EMM 4 to 20 mA Cooling Set Point/Desired % Capacity Input Failure 4 to 20 mA Temperature Reset Input Failure 4 to 20 mA Demand Limit Input Failure Fan Status Switch 1 Open Fan Status Switch 1 is open with Dual TSTAT configuration Fan Status Switch 2 is open with Dual TSTAT configuration Condenser Coil Maintenance Due Current Sensor Board A1 Failure Current Sensor Board A2 Failure Current Sensor Board A3 Failure Current Sensor Board B1 Failure Current Sensor Board B2 Failure Current Sensor Board B3 Failure WHY WAS THIS ALARM GENERATED? Internal clock on MBB fails Hardware failure with MBB Configuration/storage failure with MBB Configuration/storage failure with MBB Hardware failure with peripheral device MBB loses communication with CXB MBB loses communication with EMM If configured with EMM and input less than 2 mA or greater than 22 mA If configured with EMM and input less than 2 mA or greater than 22 mA If configured with EMM and input less than 2 mA or greater than 22 mA Alarm is generated when fan status switch 1 is open when the unit is in an ON state Alert is generated when fan status switch 1 is open when Y1 or Y2 are closed Alert is generated when fan status switch 1 is open when Y3 or Y4 are closed Coil Service Countdown (C.L. YES changes to NO NO YES RCRN NO ENTER 66 . Unit returns to 100% demand limit control. Unit is not allowed to run. Reset function disabled. Set point function/% capacity function disabled. Unit defaults to Local On mode. Manual Manual Manual Manual Automatic Automatic T174 T176 T177 A200 T201 T202 T303 T500 T501 T502 T503 T504 T505 Alert Alert Alert Alarm Alert Alert Alert Alert Alert Alert Alert Alert Alert Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic CCN CSB CXB DTT EEPROM EMM — — — — — LEGEND Carrier Comfort Network® LWT Current Sensor Board MBB Compressor Expansion Module SCT Discharge Temperature Thermistor SST Electrically Erasable Programmable TSTAT Read-Only Memory — Energy Management Module Table 27 — Example of Reading and Clearing Alarms SUB-MODE CRNT CRNT KEYPAD ENTRY ENTER ITEM AXXX or TXXX ITEM EXPANSION CURRENTLY ACTIVE ALARMS COMMENT ACTIVE ALARMS (AXXX) OR ALERTS (TXXX) DISPLAYED. CXB functions disabled 4 to 20 mA temperature reset disabled.DN) expired. No action Unit is not allowed to run. ESCAPE NO ENTER Use to clear active alarms/alerts NO Flashes Select YES Alarms/alerts clear. Alert occurs when CSB output is a constant high value Alert occurs when CSB output is a constant high value Alert occurs when CSB output is a constant high value Alert occurs when CSB output is a constant high value Alert occurs when CSB output is a constant high value Alert occurs when CSB output is a constant high value — — — — — Leaving Fluid Temperature Main Base Board Saturated Condensing Temperature Saturated Suction Temperature Thermostat ACTION TAKEN BY CONTROL Occupancy schedule will not be used.MN) item. Unit returns to normal set point control. Unit is unable to run. Demand Limit set to 100%. etc.U STR.x ºF xxx.xx xx Space Temp Control Mode Occupied Override Modes in Effect Percent Total Capacity Requested Stage Current Alarms & Alerts Time of Day Month of Year 0=Service Test 1=Off Local 2=Off CCN 3=Off Time 4=Off Emrgcy 5=On Local 6=On CCN 7=On Time 0=COOL OFF 1=LO COOL 2=HI COOL 3=COOL ON HOUR xx Day of Month xx Year of Century UNIT RUN HOUR AND START xxxx HRS Machine Operating Hours XXXX Machine Starts CIRC AND COMP RUN HOURS xxxx HRS Circuit A Run Hours xxxx HRS Circuit B Run Hours xxxx HRS Compressor A1 Run Hours xxxx HRS Compressor A2 Run Hours xxxx HRS Compressor A3 Run Hours xxxx HRS Compressor B1 Run Hours xxxx HRS Compressor B2 Run Hours xxxx HRS Compressor B3 Run Hours 00:00-23:59 1 .B2 HR.A2 HR.x ºF xxx ITEM DESCRIPTION Return Air Temperature Supply Air Temperature Active Set Point Control Point Load/Unload Factor COMMENT STAT Control Mode SPT.12 (1 = January.U HRS.B3 YES/NO YES/NO xxx x xxx xx.B HR.A1 HR.M OCC MODE CAP STGE ALRM TIME MNTH DATE YEAR RUN HRS. 2 = February.A HRS.B1 HR.APPENDIX A — DISPLAY TABLES Run Status Mode and Sub-Mode Directory SUB-MODE VIEW ITEM RAT SAT SETP CTPT LOD.A3 HR.) 01-31 67 .F DISPLAY xxx.x ºF xxx.x ºF xxx. A3 MLV CC.HPB DIG.L.A1 UL.A1 ST.M4 MBB AUX CXB EMM MARQ NAVI DISPLAY ITEM DESCRIPTION COMPRESSOR STARTS XXXX Compressor A1 Starts XXXX Compressor A2 Starts XXXX Compressor A3 Starts XXXX Compressor B1 Starts XXXX Compressor B2 Starts XXXX Compressor B3 Starts PREVENTIVE MAINTENANCE COIL MAINTENANCE xxxx HRS Coil Cleaning Srvc Int xxxx HRS Coil Service Countdown YES/NO Coil Cleaning Maint.DT C.B2 CC.L.APPENDIX A — DISPLAY TABLES (cont) Run Status Mode and Sub-Mode Directory (cont) SUB-MODE ITEM ST.B2 ST.B1 ST.A3 ST.A2 ST.B1 CC.L.M0 C.M3 C.B RMT.A LSV.Done COIL MAINTENANCE DATES MM/DD/YY HH:MM MM/DD/YY HH:MM MM/DD/YY HH:MM MM/DD/YY HH:MM MM/DD/YY HH:MM SOFTWARE VERSION NUMBERS CESR131279-XXXXX CESR131333-XXXXX CESR131173-XXXXX CESR131174-XXXXX CESR131171-XXXXX CESR130227-XXXXX COMMENT STRT User Entry PM VERS Service Test Mode and Sub-Mode Directory SUB-MODE TEST ITEM DISPLAY ITEM DESCRIPTION Service Test Mode OUTPUTS Fan 1 Relay Fan 2 Relay Fan 3 Relay Fan 4 Relay Fan 5 Relay Var Head Press % Cir A Var Head Press % Cir B Comp A1 Load Percent Liquid Line Solenoid A Liquid Line Solenoid B Remote Alarm Relay CIRCUIT A COMPRESSOR TEST Compressor A1 Relay Comp A1 Unload Time Compressor A2 Relay Compressor A3 Relay Minimum Load Valve Relay CIRCUIT B COMPRESSOR TEST Compressor B1 Relay Compressor B2 Relay Compressor B3 Relay COMMENT To enable Service Test mode.L.L. Move switch to ENABLE OUTS FAN1 FAN2 FAN3 FAN4 FAN5 V.TM CC.B3 ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF xx xx xx ON/OFF ON/OFF ON/OFF ON/OFF xx ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF CMPA CMPB 68 . Change TEST to ON.L.CL C.DN C.A2 CC.B3 COIL SI. move Enable/Off/Remote contact switch to OFF.M2 C.A CC.P LSV.M1 C.MN CL.HPA V.L. 1 CSP.GAS SH.x °F Saturated Suction Temp xxx.A SCT.A DP.x °F Supply Air Temperature xxx.A RGT.x °F Saturated Condensing Tmp xxx.x ΔF Suction Superheat Temp COMMENT UNIT CIR.A ITEM DP.CAP LCON HCON LCOF H.O STP.B SP.XPSIG Discharge Pressure XXX.x °F xxx.P SPT.XPSIG Discharge Pressure XXX.B DISPLAY ITEM DESCRIPTION PRESSURES CIRCUIT A XXX.B RGT.A SP.x °F Space Temperature xxx.A SST.x °F Saturated Condensing Tmp xxx.x °F Return Air Temperature xxx.B DISPLAY ITEM DESCRIPTION ENTERING AND LEAVING UNIT TEMPERATURES xxx.D SCT.x °F xx.ON F.x ΔF Suction Superheat Temp TEMPERATURES CIRCUIT B xxx.x °F XXX xx.B Pressures Mode and Sub-Mode Directory SUB-MODE PRC.B SST.SP HSPF F.DLT F.5 to 2 85 to 120 45 to 90 Default: 1 Default: 3 Default: 0.x °F xxx.5 Default: 110 F Default: 72 F HEAD 0 to 50 0 to 300 69 .A CIR.TME DISPLAY xxx.x ΔF xxx.x °F xxx.2 SPS.APPENDIX A — DISPLAY TABLES (cont) Temperature Mode and Sub-Mode Directory SUB-MODE ITEM RAT SAT OAT SPT SCT.XPSIG Suction Pressure COMMENT PRC.x °F Compr Return Gas Temp xxx.x °F Discharge Gas Temp xxx.x °F xxx.A D.OFF F.x ΔF xx.O P.x ΔF Circuit SCT Difference TEMPERATURES CIRCUIT A xxx.x °F Outside Air Temperature xxx.x °F xxx.x °F XX.X XXX ITEM DESCRIPTION COOLING SET POINTS Cooling Set Point 1 Cooling Set Point 2 Space T Cool Set Point Space Temperature Offset Space T SP Plus Offset Percent CAP Requested Lo Cool On Set Point HI Cool On Set Point Lo Cool Off Set Point HEAD PRESSURE SET POINTS Head Set Point ON Head Set Point OFF Fan On Set Point Fan Off Set Point Fan Stage Delta Fan Delta Active Time RANGE 40 to 80 40 to 80 65 to 80 COMMENT Default: 55 F Default: 50 F Default: 78 F COOL –1 to 2 0.x °F Compr Return Gas Temp xxx.XPSIG Suction Pressure PRESSURES CIRCUIT B XXX.5 to 20 0.x ΔF xxx.B Set Points Mode and Sub-Mode Directory SUB-MODE ITEM CSP.x ΔF xx.x °F Saturated Suction Temp xxx.B SH. O CIR.R V.MA DISPLAY ITEM DESCRIPTION GENERAL INPUTS ON/OFF Start/Stop Switch ON/OFF Indoor Fan Status-CIRA ON/OFF Y1 Thermostat Input ON/OFF Y2 Thermostat Input ON/OFF Indoor Fan Status-CIRB ON/OFF Y3 Thermostat Input ON/OFF Y4 Thermostat Input ON/OFF Demand Limit Switch 1 ON/OFF Demand Limit Switch 2 CIRCUIT INPUTS ON/OFF Compressor A1 Feedback ON/OFF Compressor A2 Feedback ON/OFF Compressor A3 Feedback ON/OFF High Pressure Switch A ON/OFF Compressor B1 Feedback ON/OFF Compressor B2 Feedback ON/OFF Compressor B3 Feedback ON/OFF High Pressure Switch B 4-20 MA INPUTS XX.HPA V.I CRCT 4-20 Outputs Mode and Sub-Mode Directory SUB-MODE ITEM FAN1 FAN2 FAN3 FAN4 FAN5 MLV.A CC.B2 CC.A1 DPE.1 Y.B3 LSV.R D.B DISPLAY ITEM DESCRIPTION GENERAL OUTPUTS ON/OFF Fan 1 Relay ON/OFF Fan 2 Relay ON/OFF Fan 3 Relay ON/OFF Fan 4 Relay ON/OFF Fan 5 Relay ON/OFF Minimum Load Valve Relay XXX Var Head Press Out Cir A XXX Var Head Press Out Cir B OUTPUTS CIRCUIT A ON/OFF Compressor A1 Relay XXX Comp A1 Load Percent ON/OFF Digital Scroll Solenoid ON/OFF Compressor A2 Relay ON/OFF Compressor A3 Relay ON/OFF Liquid Line Solenoid A OUTPUTS CIRCUIT B ON/OFF Compressor B1 Relay ON/OFF Compressor B2 Relay ON/OFF Compressor B3 Relay ON/OFF Liquid Line Solenoid B COMMENT GEN.A CIR.APPENDIX A — DISPLAY TABLES (cont) Inputs Mode and Sub-Mode Directory SUB-MODE ITEM STST IDFA Y.4 DLS1 DLS2 FKA1 FKA2 FKA3 HPSA FKB1 FKB2 FKB3 HPSB DMND RSET CL.X 4-20 Cooling Demand COMMENT GEN.A2 CC.2 IDFB Y.3 Y.B 70 .X 4-20 ma Reset Signal XX.HPB CC.SOL CC.X 4-20 ma Demand Signal XX.A3 LSV.B1 CC. APPENDIX A — DISPLAY TABLES (cont) Configuration Mode and Sub-Mode Directory SUB-MODE ITEM TEST METR DISP LANG PAS.E PASS SIZE NCKT SZ.A1 SZ.A2 SZ.A3 SZ.B1 SZ.B2 SZ.B3 FAN.S A1.TY MAX.T CCNA CCNB CCN BAUD X CCN Baud Rate DISPLAY ON/OFF ON/OFF X ENBL/DSBL XXXX ITEM DESCRIPTION DISPLAY CONFIGURATION Test Display LEDs Metric Display Language Selection Password Enable Service Password UNIT CONFIGURATION Unit Size Number of Refrigerant Circuits Compressor A1 Size Compressor A2 Size Compressor A3 Size Compressor B1 Size Compressor B2 Size Compressor B3 Size Fan Sequence Number Compressor A1 Digital Maximum A1 Unload Time CCN NETWORK CONFIGS CCN Address CCN Bus Number Default: 1 Range: 0 to 239 Default: 1 Range: 0 to 239 Default: 3 1 = 2400 2 = 4800 3 = 9600 4 =19,200 5 =38,400 COMMENT Off = English On = Metric Default: 0 0 = English 1 = Espanol 2 = Francais 3 = Portuguese UNIT X XX XX XX XX XX XX XX YES/NO XX XXX XXX MLV.S CSB.E SPT.S SPOS SPOR OPT1 RAT.T UNIT OPTIONS 1 HARDWARE YES/NO Minimum Load Valve Select ENBL/DSBL CSB Boards Enable ENBL/DSBL Space Temp Sensor ENBL/DSBL Space Temp Offset Enable XX Space Temp Offset Range 1 to 10 X RAT Thermistor Type Default: 0 0 = 5 K 1 = 10 K 2 = None Default: 0 0 = 5 K 1 = 10 K 2 = None SAT.T EMM X YES/NO SAT Thermistor Type EMM Module installed UNIT OPTIONS 2 CONTROLS C.TYP X Machine Control Type OPT2 CTRL X Control Method LOAD X Loading Sequence Select LLCS DELY X XX Lead/Lag Circuit Select Minutes Off Time Default: 4 1 = VAV 2 = Invalid 3 = TSTAT MULTI 4 = TSTAT 2 STG 5 = SPT MULTI 6 = Invalid 7 = PCT CAP 8 = DUAL TSTAT 9 = VAV SETPOINT Default: 0 0 = Enable/Off/Remote Switch 1 = Occupancy 2 = CCN Control Default: 1 1 = Equal 2 = Staged Default: 1 1 = Automatic 2 = Circuit A Leads 3 = Circuit B Leads Default: 0 Range: 0 to 15 Minutes 71 APPENDIX A — DISPLAY TABLES (cont) Configuration Mode and Sub-Mode Directory (cont) SUB-MODE ITEM MMR.S P.GAN M.MST I.GAN D.GAN MIN.S DISPLAY YES/NO XX XX.X XX.X XX ITEM DESCRIPTION MOTORMASTER Motormaster Select Head Pressure P Gain Head Pressure I Gain Head Pressure D Gain Minimum Fan Speed RESET COOL TEMP Default: 0 0 = No Reset 1 = 4 to 20 mA Input 2 = Outdoor Air Temperature 3 = Return Temperature 4 = Space Temperature Default: 0.0 ΔF Range: -30 to 30 ΔF Default: 125 F Range: 0º to125 F Default: 0 F Range: 0º to125 F Default: 0.0 ΔF Range: -30 to 30 ΔF Default: 10.0 ΔF Range: 0º to125 F Default: 0 ΔF Range: 0º to125 F Default: 0.0 ΔF Range: -30 to 30 ΔF Default: 0 0 = None 1 = Switch 2 - 4 to 20 mA Input 3 = CCN Loadshed Default: 100% Range: 0 to 100% Default: 0 Range: 0 to 99 Default: 0% Range: 0 to 60% Default: 60 minutes Range: 0 to 120 minutes Default: 80% Range: 0 to 100% Default: 50% Range: 0 to 100% Default: Enable Default: 1.0 Range: 0.3 to 2 Default: 1 Range: 1 to 99 Default: 1 Range: 1 to 4 COMMENT Default: 1 Range: 1 to 4 Default: 0.1 Range: -20 to 20 Default: 0.0 Range: -20 to 20 CRST X Cooling Reset Type MA.DG RM.NO RM.F RM.DG RT.NO RT.F RSET RT.DG XX.XΔF XXX.X °F XXX.X °F XX.X °F XXX.XΔF XXX.XΔF XX.X °F 4-20 - Degrees Reset Remote - No Reset Temp Remote - Full Reset Temp Remote - Degrees Reset Return - No Reset Temp Return - Full Reset Temp Return - Degrees Reset DMDC X Demand Limit Select DM20 SHNM SHDL SHTM DLS1 DLS2 RL.S CRMP SLCT SCHD Z.GN EN.A1 EN.A2 EN.A3 EN.B1 EN.B2 EN.B3 EN.FB REV.R T.D.B OAT.B G.S.B BC.AK XXX% XXX XXX% XXX XXX% XXX% ENBL/DSBL ENBL/DSBL XX X.X YES/NO YES/NO YES/NO YES/NO YES/NO YES/NO YES/NO YES/NO ON/OFF ON/OFF ON/OFF ON/OFF Demand Limit at 20 mA Loadshed Group Number Loadshed Demand Delta Maximum Loadshed Time Demand Limit Switch 1 Demand Limit Switch 2 SETPOINT AND RAMP LOAD Ramp Load Select Cooling Ramp Loading Schedule Number Deadband Multiplier SERVICE CONFIGURATION Enable Compressor A1 Enable Compressor A2 Enable Compressor A3 Enable Compressor B1 Enable Compressor B2 Enable Compressor B3 Enable Compressor FBack Reverse Rotation Enable BROADCAST CONFIGURATION CCN Time/Date Broadcast CCN OAT Broadcast Global Schedule Broadcst CCN Broadcast Ack'er SERV BCST 72 APPENDIX A — DISPLAY TABLES (cont) Time Clock Mode and Sub-Mode Directory SUB-MODE TIME ITEM HH.MM MNTH DATE DOM DAY YEAR STR.M STR.W STR.D MIN.A STP.M STP.W STP.D MIN.S DISPLAY ITEM DESCRIPTION TIME OF DAY XX.XX Hour and Minute MONTH, DATE, DAY, AND YEAR XX XX X Month of Year Day of Month Day of Week COMMENT Military (00:00 - 23:59) 1 - 12 (1 = January, 2 = February, etc.) Range: 01 -31 1 - 7 (1 = Sunday, 2 = Monday, etc.) DST HOL.L MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN HD.01 XXXX Year of Century DAYLIGHT SAVINGS TIME XX Month X Week X Day XX Minutes to Add XX Month XX Week XX Day XX Minutes to Subtract LOCAL HOLIDAY SCHEDULES HOLIDAY SCHEDULE 01 XX Holiday Start Month XX Start Day XX Duration (days) HOLIDAY SCHEDULE 02 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 03 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 04 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 05 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 06 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 07 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 08 Holiday Start Month Start Day Duration (days) Default: 4 Range 1- 12 Default: 1 Range 1- 5 Default: 7 Range 1- 7 Default: 60 Range 0 - 99 Default: 10 Range 1- 12 Default: 5 Range 1- 5 Default: 7 Range 1- 7 Default: 60 Range 0 - 99 HD.02 1 - 12 (1 = January, 2 = February, etc.) 01-31 HD.03 1 - 12 (1 = January, 2 = February, etc.) 01-31 HD.04 1 - 12 (1 = January, 2 = February, etc.) 01-31 HD.05 1 - 12 (1 = January, 2 = February, etc.) 01-31 HD.06 1 - 12 (1 = January, 2 = February, etc.) 01-31 HD.07 1 - 12 (1 = January, 2 = February, etc.) 01-31 HD.08 1 - 12 (1 = January, 2 = February, etc.) 01-31 73 ) 01-31 HD.14 1 . 2 = February. etc. etc.12 (1 = January. 2 = February.17 1 .) 01-31 HD.12 (1 = January.) 01-31 HD.09 HD. 2 = February.12 (1 = January. etc.) 01-31 HD. etc.18 1 .13 1 .10 1 .12 (1 = January.) 01-31 HD. etc.11 1 .16 1 .) 01-31 74 . 2 = February. 2 = February.12 (1 = January.) 01-31 HD. etc.12 (1 = January.12 (1 = January.) 01-31 HD.12 1 .12 (1 = January. etc. 2 = February. etc. 2 = February.12 (1 = January. etc.15 1 . 2 = February.19 1 .APPENDIX A — DISPLAY TABLES (cont) Time Clock Mode and Sub-Mode Directory (cont) SUB-MODE ITEM MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN DISPLAY ITEM DESCRIPTION HOLIDAY SCHEDULE 09 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 10 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 11 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 12 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 13 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 14 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 15 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 16 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 17 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 18 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 19 Holiday Start Month Start Day Duration (days) COMMENT 1 . 2 = February. etc.) 01-31 HD.) 01-31 HD.12 (1 = January. 2 = February. 2 = February.12 (1 = January.) 01-31 HD. etc. etc.12 (1 = January. 2 = February. 2 = February.) 01-31 HD.12 (1 = January.APPENDIX A — DISPLAY TABLES (cont) Time Clock Mode and Sub-Mode Directory (cont) SUB-MODE ITEM MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN MON DAY LEN DISPLAY ITEM DESCRIPTION HOLIDAY SCHEDULE 20 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 21 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 22 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 23 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 24 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 25 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 26 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 27 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 28 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 29 Holiday Start Month Start Day Duration (days) HOLIDAY SCHEDULE 30 Holiday Start Month Start Day Duration (days) COMMENT 1 . etc.12 (1 = January.) 01-31 75 .) 01-31 HD.12 (1 = January. 2 = February. 2 = February.24 1 .) 01-31 HD.12 (1 = January.27 1 .) 01-31 HD.12 (1 = January. 2 = February.) 01-31 HD.) 01-31 HD.26 1 . etc. etc.) 01-31 HD. 2 = February. etc.12 (1 = January.) 01-31 HD.28 1 .20 HD. 2 = February.22 1 . etc.12 (1 = January.23 1 .) 01-31 HD. 2 = February.30 1 . etc.) 01-31 HD. 2 = February. etc. 2 = February.12 (1 = January.29 1 . etc.25 1 .12 (1 = January.21 1 . 2 = February.12 (1 = January. etc. etc. 5 UNC.1 HOL.5 MON.23:59) Military (00:00 .2 THU.3 SUN.5 THU.4 FRI.4 TUE.5 Military (00:00 .23:59) PER.1 SUN.23:59) Military (00:00 .1 THU.3 WED.23:59) PER.5 WED.2 UNC.4 OCC.23:59) PER.3 THU.3 Military (00:00 .2 SAT.23:59) Military (00:00 .1 MON.4 SUN.3 TUE.4 MON.3 HOL.1 WED.5 SAT.1 OCC.5 76 .2 HOL.3 OCC.4 UNC.23:59) Military (00:00 .3 UNC.4 WED.23:59) Military (00:00 .3 FRI.5 HOL.N SCH.3 MON.2 FRI.4 HOL.5 SUN.2 SUN.1 SAT.23:59) PER.2 WED.4 Military (00:00 .1 TUE.1 UNC.2 MON.4 SAT.2 TUE.2 OCC.1 OCC.5 TUE.2 Military (00:00 .5 FRI.1 FRI.L ITEM DISPLAY ITEM DESCRIPTION Schedule Number 0 LOCAL OCCUPANCY SCHEDULE OCCUPANCY PERIOD 1 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period OCCUPANCY PERIOD 2 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period OCCUPANCY PERIOD 3 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period OCCUPANCY PERIOD 4 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period OCCUPANCY PERIOD 5 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period COMMENT PER.APPENDIX A — DISPLAY TABLES (cont) Time Clock Mode and Sub-Mode Directory (cont) SUB-MODE SCH.4 THU.23:59) Military (00:00 .3 SAT. 8 MON.6 Military (00:00 .7 WED.23:59) PER.6 SUN.23:59) PER.6 THU.7 SAT.7 UNC.6 FRI.8 THU.23:59) Military (00:00 .8 WED.7 Military (00:00 .7 THU.7 OCC.O T.7 TUE.7 MON.OVR DISPLAY ITEM DESCRIPTION OCCUPANCY PERIOD 6 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period OCCUPANCY PERIOD 7 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period OCCUPANCY PERIOD 8 XX:XX Period Occupied Time XX:XX Period Unoccupied Time YES/NO Monday In Period YES/NO Tuesday In Period YES/NO Wednesday In Period YES/NO Thursday In Period YES/NO Friday In Period YES/NO Saturday In Period YES/NO Sunday In Period YES/NO Holiday In Period SCHEDULE OVERRIDE X Timed Override Hours X Override Time Limit XX.7 FRI.T OVR.7 SUN.APPENDIX A — DISPLAY TABLES (cont) Time Clock Mode and Sub-Mode Directory (cont) SUB-MODE ITEM OCC.X Space Temperature Offset YES/NO Timed Override COMMENT Military (00:00 .8 OVR.8 FRI.23:59) PER.6 UNC.23:59) Military (00:00 .8 SAT.6 OCC.23:59) Military (00:00 .6 TUE.6 WED.6 HOL.6 MON.L SPT.8 SUN.8 UNC.8 TUE.6 SAT.8 HOL.8 OVR Default: 0 Range 0-4 hours Default: 0 Range 0-4 hours User Entry 77 .7 HOL. On Time Low Sound Mode TASK STATES COMMENT MODE TKCA X Circuit A State TKCB TSKS X Circuit B State TKFA X Circuit A Fan State TKFB X Circuit B Fan State 0 = OFF 1 = ALLOW TO RUN 2 = PRE START 3 = STARTING 4 = RUNNING 5 = STOPPING 0 = OFF 1 = ALLOW TO RUN 2 = PRE START 3 = STARTING 4 = RUNNING 5 = STOPPING 0 = OFF 1 = PRE-START DETERMINATION 2 = PRE START 3 = NORMAL 4 = STOPPING 0 = OFF 1 = PRE-START DETERMINATION 2 = PRE START 3 = NORMAL 4 = STOPPING Alarms Mode and Sub-Mode Directory SUB-MODE CRNT RCRN HIST ITEM AXXX TXXX PXXX YES/NO AXXX TXXX PXXX DISPLAY ITEM DESCRIPTION CURRENTLY ACTIVE ALARMS Current Alarms 1-25 Reset All Current Alarms ALARM HISTORY Alarm History 1-20 Alarms are shown as AXXX Alerts are shown as TXXX COMMENT Alarms are hown as AXXX Alerts are shown as TXXX 78 .APPENDIX A — DISPLAY TABLES (cont) Operating Mode and Sub-Mode Directory SUB-MODE ITEM MD05 MD06 MD09 MD10 MD14 MD15 MD17 MD18 MDTG MD21 MD22 MD23 MD25 DISPLAY ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ITEM DESCRIPTION MODES CONTROLLING UNIT Ramp Load Limited Timed Override in effect Slow Change Override Minimum OFF time active Temperature Reset Demand Limited Low Temperature Cooling High Temperature Cooling Time Guard Active High SCT Circuit A High SCT Circuit B Minimum Comp. A DISCRETE OUTPUTS Compressor A1 Relay Comp A1 Load Percent Compressor A2 Relay Compressor A3 Relay Minimum Load Valve Relay Liquid Line Solenoid A CIRC.n NNN No/Yes NNN NN NNN.n NNN.n NNN.APPENDIX B — CCN TABLES Status Tables DESCRIPTION TSTAT_IN (Thermostat Input) Indoor Fan Status-CIRA Y1 Thermostat Input Y2 Thermostat Input Indoor Fan Status-CIRB Y3 Thermostat Input Y4 Thermostat Input A_UNIT (General Unit Parameters) Control Mode Space Temp Control Mode Occupied CCN Chiller Alarm State 4-20 Cooling Demand Active Demand Limit Override Modes in Effect Percent Total Capacity Requested Stage Active Set Point Control Point Return Air Temperature Supply Air Temperature Emergency Stop Minutes Left for Start CIRCA_AN (Circuit A Analog Parameters) Percent Total Capacity Percent Available Capacity Discharge Pressure Suction Pressure Head Set Point ON Head Set Point OFF Saturated Condensing Temperature Saturated Suction Temperature Variable Head Press Out Circuit A Compressor Return Gas Temperature Discharge Gas Temperature Suction Superheat Temperature CIRCADIO (Circuit A Discrete Inputs/Outputs) CIRC.n NNN.n NNN.n NNN.n Off/On Off/On Off/On Off/On Off/On Off/On Off/On Open/Close % K_A1_RLY DIGITAL% K_A2_RLY K_A3_RLY MLV_RLY LLSV_A K_A1_FBK K_A2_FBK K_A3_FBK HPSA 79 .A DISCRETE INPUTS Compressor A1 Feedback Compressor A2 Feedback Compressor A3 Feedback High Pressure Switch A VALUE Off/On Off/On Off/On Off/On Off/On Off/On 10-char ASCII N No/Yes stop/start 6-char ASCII NN.n NNN.n NNN.n NNN.n UNITS POINT NAME IDFA_FS Y1 Y2 IDFB_FS Y3 Y4 STAT SPTMODE OCC CHIL_S_S ALM COOL_MA DEM_LIM MODE CAP_T STAGE SP CTRL_PNT RETURN_T SUPPLY_T EMSTOP MIN_LEFT CAPA_T CAPA_A DP_A SP_A HSP_ON HSP_OFF SCTA SSTA VHPA_ACT RGTA DIGCMPDT SH_A milliAmps % % degF degF degF degF % % PSIG PSIG degF degF degF degF % degF degF deltaF Off/On NNN.n NNN.n NNN.n NNN.n Enable/EMStop 5-char ASCII NNN NNN NNN.n NNN. n NNN.n NN.APPENDIX B — CCN TABLES (cont) Status Tables (cont) DESCRIPTION CIRCB_AN (Circuit B Analog Parameters) Percent Total Capacity Percent Available Capacity Discharge Pressure Suction Pressure Saturated Condensing Temperature Saturated Suction Temperature Variable Head Press Out Circuit B Compressor Return Gas Temperature Suction Superheat Temperature CIRCBDIO (Circuit B Discrete Inputs/Outputs) CIRC.n NNN.n NNN.n NNN.n degF degF deltaF milliAmps degF degF milliAmps FANSTGEA FANSTGEB FAN_1 FAN_2 FAN_3 FAN_4 FAN_5 RETURN_T SUPPLY_T SCTDELTA RST_MA OAT SPT LMT_MA DMD_SW1 DMD_SW2 DL_STAT SAT_SP degF 80 .B DISCRETE OUTPUTS Compressor B1 Relay Compressor B2 Relay Compressor B3 Relay Minimum Load Valve Relay Liquid Line Solenoid B CIRC.B DISCRETE INPUTS Compressor B1 Feedback Compressor B2 Feedback Compressor B3 Feedback High Pressure Switch B OPTIONS (Unit Parameters) FANS Fan Stage Circuit A Fan Stage Circuit B Fan 1 Relay Fan 2 Relay Fan 3 Relay Fan 4 Relay Fan 5 Relay UNIT ANALOG VALUES Return Air Temperature Supply Air Temperature Circuit SCT Difference TEMPERATURE RESET 4-20 ma Reset Signal Outside Air Temperature Space Temperature DEMAND LIMIT 4-20 ma Demand Signal Demand Limit Switch 1 Demand Limit Switch 2 CCN Loadshed Signal MISCELLANEOUS Supply Air Set Point VALUE NNN NNN NNN.n NNN.n NNN.n NNN.n NNN.n Off/On Off/On N NNN.n NNN.n NNN.n UNITS % % PSIG PSIG degF degF % degF deltaF POINT NAME CAPB_T CAPB_A DP_B SP_B SCTB SSTB VHPB_ACT RGTB SH_B Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Open/Close K_B1_RLY K_B2_RLY K_B3_RLY MLV_RLY LLSV_B K_B1_FBK K_B2_FBK K_B3_FBK HPSB NNN NNN Off/On Off/On Off/On Off/On Off/On NNN.n NN. Full Reset Temperature Return .n NNN.Degrees Reset DEMAND LIMIT Demand Limit Select Demand Limit at 20 mA Loadshed Group Number Loadshed Demand Delta Maximum Loadshed Time Demand Limit Switch 1 Demand Limit Switch 2 VALUE NNN N NNN NNN NNN NNN NNN NNN N No/Yes NN No/Yes No/Yes Disable/Enable Disable/Enable Disable/Enable NN N N No/Yes N N N N Disable/Enable NN N.n NNN.APPENDIX B — CCN TABLES (cont) CCN Configuration Tables DESCRIPTION UNIT (Unit Configuration) Unit Size Number of Refrig Ckts Compressor A1 Size Compressor A2 Size Compressor A3 Size Compressor B1 Size Compressor B2 Size Compressor B3 Size Fan Sequence Number Compressor A1 Digital Maximum A1 Unload Time OPTIONS1 (Options 1 Configuration) Motormaster Select Minimum Load Valve Select CSB Boards Enable Space Temperature Sensor Space Temperature Offset Enable Space Temperature Offset Range RAT Thermistor Type SAT Thermistor Type EMM Module Installed OPTIONS2 (Options 2 Configuration) Machine Control Type Control Method Loading Sequence Select Lead/Lag Circuit Select Ramp Load Select Minutes Off Time Deadband Multiplier SCHEDOVR (Timed Override Set Up) Schedule Number Override Time Limit Timed Override Hours Timed Override RESETCON (Temperature Reset and Demand Limit) COOLING RESET Cooling Reset Type 4-20 MA RESET 4-20 .n NNN.n NNN.No Reset Temperature Remote .n NNN.Degrees Reset REMOTE RESET Remote .n NN N N No/Yes UNITS tons tons tons tons tons tons tons POINT NAME SIZE NUMCKTS SIZE_A1 SIZE_A2 SIZE_A3 SIZE_B1 SIZE_B2 SIZE_B3 FAN_TYPE CPA1TYPE MAXULTME MM_SLCT MLV_FLG CSB_ENA SPTSENS SPTOSENS SPTO_RNG RATTYPE SATTYPE EMM_BRD CTRLTYPE CONTROL SEQ_TYPE LEAD_TYP RAMP_EBL DELAY Z_GAIN SCHEDNUM OTL OVR_EXT TIMEOVER secs deltaF mins hours hours N NNN.Full Reset Temperature Remote .Degrees Reset RETURN TEMPERATURE RESET Return .No Reset Temperature Return .n N NNN NN NN NNN NNN NNN deltaF degF degF deltaF deltaF deltaF deltaF CRST_TYP 420_DEG REM_NO REM_FULL REM_DEG RTN_NO RTN_FULL RTN_DEG DMD_CTRL DMT20MA SHED_NUM SHED_DEL SHED_TIM DLSWSP1 DLSWSP2 % % mins % % 81 .n NNN. n NNNNNN.n NN.n NNN.n NNNNNN.n NNN.n Disable/Enable Disable/Enable Disable/Enable Disable/Enable Disable/Enable Disable/Enable deltaF deltaF deltaF deltaF UNITS POINT NAME PASSWORD PASS_EBL DISPUNIT LANGUAGE A1SCTDT A2SCTDT B1SCTDT B2SCTDT ENABLEA1 ENABLEA2 ENABLEA3 ENABLEB1 ENABLEB2 ENABLEB3 NNN.n NNNNNN.n NNN.APPENDIX B — CCN TABLES (cont) CCN Configuration Tables (cont) DESCRIPTION DISPLAY (Marquee Display Set Up) Service Password Password Enable Metric Display Language Selection HPA (Head Pressure) SCT Delta for Compressor A1 SCT Delta for Compressor A2 HPB (Head Pressure) SCT Delta for Comp B1 SCT Delta for Comp B2 SERVICE Enable Compressor A1 Enable Compressor A2 Enable Compressor A3 Enable Compressor B1 Enable Compressor B2 Enable Compressor B3 SET POINT COOLING Cooling Set Point 1 Cooling Set Point 2 Space T Cool Set Point Space Temperature Offset Space T SP Plus Offset Lo Cool On Set Point HI Cool On Set Point Lo Cool Off Set Point RAMP LOADING Cooling Ramp Loading Head Set Point ON Head Set Point OFF Fan On Set Point Fan Off Set Point Fan Stage Delta Fan Delta Active Time Unload Time Threshold VALUE NNNN Disable/Enable Off/On N NNN.n NN.n NNN.n NN.n NNN.n NNN.n NNNNNN.n NNNNNN NNNNNN.n NNNNNN NNNNNN NNNNNN NNNNNN NNNNNN NNNNNN NNNNNN NNNNNN UNITS hours hours hours hours hours hours hours hours hours POINT NAME HR_MACH CY_MACH HR_CIRA HR_A1 HR_A2 HR_A3 HR_CIRB HR_B1 HR_B2 HR_B3 CY_CIRA CY_A1 CY_A2 CY_A3 CY_CIRB CY_B1 CY_B2 CY_B3 82 .n NNN.n NNN.n NNN NN degF degF degF deltaF degF deltaF deltaF deltaF CSP1 CSP2 SPT_SP SPTO SPSP_PO DMDLCON DMDHCON DMDLCOFF CRAMP HSP_ON HSP_OFF FANONSP FANOFFSP FSTGDLTA FANDLTTM UTTHRESH degF degF degF degF deltaF secs secs CCN Maintenance Tables DESCRIPTION STRTHOUR (Maintenance Display) Machine Operating Hours Machine Starts Circuit A Run Hours Compressor A1 Run Hours Compressor A2 Run Hours Compressor A3 Run Hours Circuit B Run Hours Compressor B1 Run Hours Compressor B2 Run Hours Compressor B3 Run Hours Circuit A Starts Compressor A1 Starts Compressor A2 Starts Compressor A3 Starts Circuit B Starts Compressor B1 Starts Compressor B2 Starts Compressor B3 Starts VALUE NNNNNN NNNNNN NNNNNN NNNNNN.n NN.n NN.n NNN.n N.n NNN. n SMZ CTRL_PNT RETURN_T SUPPLY_T MODE_5 MODE_9 MODE_17 MODE_18 MODE_23 A1SCTDT A2SCTDT B1SCTDT B2SCTDT UNITS POINT NAME MODE_5 MODE_6 MODE_9 MODE_10 MODE_14 MODE_15 MODE_17 MODE_18 MODE_21 MODE_22 MODE_23 MODE_25 MODE_TG ALARM01C ALARM02C ALARM03C ALARM04C ALARM05C ALARM06C ALARM07C ALARM08C ALARM09C ALARM10C ALARM11C ALARM12C ALARM13C ALARM14C ALARM15C ALARM16C ALARM17C ALARM18C ALARM19C ALARM20C ALARM21C ALARM22C ALARM23C ALARM24C ALARM25C degF degF degF deltaF deltaF deltaF deltaF 83 .n NNN. On Time Low Sound Mode Time Guard Active Alarms (Maintenance Display) Active Alarm #1 Active Alarm #2 Active Alarm #3 Active Alarm #4 Active Alarm #5 Active Alarm #6 Active Alarm #7 Active Alarm #8 Active Alarm #9 Active Alarm #10 Active Alarm #11 Active Alarm #12 Active Alarm #13 Active Alarm #14 Active Alarm #15 Active Alarm #16 Active Alarm #17 Active Alarm #18 Active Alarm #19 Active Alarm #20 Active Alarm #21 Active Alarm #22 Active Alarm #23 Active Alarm #24 Active Alarm #25 Versions (Software Versions) MBB CESR131279AUX CESR131333CXB CESR131173EMM CESR131174MARQUEE CESR131171NAVIGATOR CESR130227LOADFACT (Maintenance Display) Load/Unload Factor Control Point Return Air Temperature Supply Air Temperature Ramp Load Limited Slow Change Override Low Temperature Cooling High Temperature Cooling Minimum Comp.APPENDIX B — CCN TABLES (cont) CCN Maintenance Tables (cont) DESCRIPTION CURRMODS (Maintenance Display) Ramp Load Limited Timed Override in effect Slow Change Override Minimum OFF time active Temperature Reset Demand Limited Low Temperature Cooling High Temperature Cooling High SCT Circuit A High SCT Circuit B Minimum Comp.n NNN.n NNN.n NNN. On Time LEARNFNS (Maintenance Display) SCT Delta for Comp A1 SCT Delta for Comp A2 SCT Delta for Comp B1 SCT Delta for Comp B2 VALUE Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 4-char ASCII 5-char ASCII 5-char ASCII 5-char ASCII 5-char ASCII 5-char ASCII 5-char ASCII NNN NNN.n Off/On Off/On Off/On Off/On Off/On NNN.n NNN. Date Coil Cleaning Maint.n NNN.n NNN.n Off/On Off/On Off/On Off/On UNITS hours hours POINT NAME SI_COIL CL_CDOWN CL_MAINT COIL_PM0 COIL_PM1 COIL_PM2 COIL_PM3 COIL_PM4 NET_CTRL S_A1_RLY S_A2_RLY S_A3_RLY S_B1_RLY S_B2_RLY S_B3_RLY S_FAN_1 S_FAN_2 S_FAN_3 S_FAN_4 S_FAN_5 S_LLSV_A S_LLSV_B S_A1ULTM S_MLV S_ALM CAPA_T CAPA_A DP_A SP_A HSP_ON HSP_OFF SCTA SSTA RGTA DIGCMPDT SH_A K_A1_RLY K_A2_RLY K_A3_RLY MLV_RLY K_A1_FBK K_A2_FBK K_A3_FBK CAPB_T CAPB_A DP_B SP_B HSP_ON HSP_OFF SCTB SSTB RGTB SH_B K_B1_RLY K_B2_RLY K_B3_RLY MLV_RLY secs % % PSIG PSIG degF degF degF degF degF degF deltaF % % PSIG PSIG degF degF degF degF degF deltaF 84 .Date Coil Cleaning Maint.n NNN.Date TESTMODE (Maintenance Display) Service Test Mode Compressor A1 Relay Compressor A2 Relay Compressor A3 Relay Compressor B1 Relay Compressor B2 Relay Compressor B3 Relay Fan 1 Relay Fan 2 Relay Fan 3 Relay Fan 4 Relay Fan 5 Relay Liquid Line Solenoid A Liquid Line Solenoid B Comp A1 Unload Time Minimum Load Valve Relay Remote Alarm Relay RUNTEST (Maintenance Display) Percent Total Capacity Percent Available Capacity Discharge Pressure Suction Pressure Head Set Point ON Head Set Point OFF Saturated Condensing Temperature Saturated Suction Temperature Compr Return Gas Temperature Discharge Gas Temperature Suction Superheat Temperature Compressor A1 Relay Compressor A2 Relay Compressor A3 Relay Minimum Load Valve Relay Compressor A1 Feedback Compressor A2 Feedback Compressor A3 Feedback Percent Total Capacity Percent Available Capacity Discharge Pressure Suction Pressure Head Set Point ON Head Set Point OFF Saturated Condensing Temperature Saturated Suction Temperature Compr Return Gas Temperature Suction Superheat Temperature Compressor B1 Relay Compressor B2 Relay Compressor B3 Relay Minimum Load Valve Relay VALUE NNNNN NNNNN No/Yes 15-char ASCII 15-char ASCII 15-char ASCII 15-char ASCII 15-char ASCII Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On Off/On NN Off/On Off/On NNN NNN NNN.n Off/On Off/On Off/On Off/On Off/On Off/On Off/On NNN NNN NNN.n NNN.APPENDIX B — CCN TABLES (cont) CCN Maintenance Tables (cont) DESCRIPTION PM-COIL (Maintenance Display) Coil Cleaning Srvc Inter Coil Service Countdown Coil Cleaning Maint.Date Coil Cleaning Maint.n NNN.Date Coil Cleaning Maint.n NNN.n NNN.n NNN.n NNN.Done Coil Cleaning Maint.n NNN.n NNN.n NNN.n NNN.n NNN.n NNN. . A. Catalog No. 04-53380003-01 Printed in U.Copyright 2009 Carrier Corporation Manufacturer reserves the right to discontinue. Form 38AP-1T Pg 86 210 11-09 Replaces: New . specifications or designs without notice and without incurring obligations.S. or change at any time. IF NEED. SENSORS (RAT. 11. 9. UNIT IS INSTALLED LEVEL AS PER THE INSTALLATION INSTRUCTIONS. MOTORMASTER IS INSTALLED ON FAN 1. 5. ALL TERMINALS ARE TIGHT. POWER SUPPLY AGREES WITH THE UNIT NAMEPLATE. 6. ELECTRICAL CIRCUIT PROTECTION HAS BEEN SIZED AND INSTALLED PROPERLY. SAT. Catalog No. ALL CABLES AND THERMISTORS HAVE BEEN INSPECTED FOR CROSSED WIRES. ELECTRICAL POWER WIRING IS INSTALLED PROPERLY. 04-53380003-01 Printed in U. SPT) FOR CONTROL TYPES 3. 8. LONG LINE OPTION KIT IS INSTALLED. specifications or designs without notice and without incurring obligations. 4. 12. UNIT IS PROPERLY GROUNDED.START-UP CHECKLIST FOR 38AP SPLIT SYSTEM CONDENSING UNIT (Remove and use for Job File) I. YES YES YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO NO NO NO NO Manufacturer reserves the right to discontinue. 4. Form 38AP-1T Pg CL-1 210 11-09 Replaces: New . 2. Preliminary Equipment Check IS THERE ANY PHYSICAL DAMAGE? YES NO DESCRIPTION ____________________________________________________________________________ ________________________________________________________________________________________ 1. Project Information JOB NAME ______________________________________________________________________________ ADDRESS _______________________________________________________________________________ CITY ____________________________________________ STATE _______________ ZIP______________ INSTALLING CONTRACTOR ________________________________________________________________ SALES OFFICE ___________________________________________________________________________ START-UP PERFORMED BY ________________________________________________________________ Design Information CAPACITY OAT SUPPLY AIR TEMPERATURE RETURN AIR TEMPERATURE COIL SIZE (sq ft) COIL CIRCUITING CFM SUCTION LINE DIAMETER LIQUID LINE DIAMETER LINE LENGTH DOUBLE RISER (Y/N) CV/VAV CONTROL TYPE (1-9) ELEVATION DELTA BETWEEN INDOOR/OUTDOOR UNIT MODEL ______________________________ SERIAL ________________________________ II. AND 5 ARE INSTALLED. ALL PLUG ASSEMBLIES ARE TIGHT.S. 10. or change at any time. 3. 7. ALL THERMISTORS ARE FULLY INSERTED INTO WELLS.A. 5-18. THE FAN AND MOTOR PULLEYS OF THE INDOOR FAN HAVE BEEN CHAECKED FOR PROPER ALIGNMENT 13. VERIFY EVAPORATOR FAN CFM. CRANKCASE HEATERS ARE OPERATIONAL AND HAVE BEEN ENERGIZED TO REMOVE ANY LIQUID FROM THE COMPRESSORS.) 8. 6. 11. IF INSTALLED. FILTER DRIERS AND SIGHT GLASSES ARE INSTALLED NEAR THE TXV(S). Unit Start-Up 1. THE CORRECT FAN ROTATION ON BOTH INDOOR AND OUTDOOR UNITS HAS BEEND VERIFIED. 3. REPAIR AND REPORT ANY REFRIGERANT LEAKS. 9. 16. THE PROPER FILTERS HAVE BEEN INSTALLED. COMPRESSOR OIL LEVEL IS CORRECT. LOCATE. YES NO NO CL-2 . 2. 4.9 N-M). VERIFY COMPRESSOR MOUNTING BOLT TORQUE IS 10-14 FT-LB. ALL PIPING IS CONNECTED PROPERLY. YES YES YES YES YES YES YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO LOCATE. THE LIQUID SOLENOID VALVES. 12. THE PIPING HAS BEEN CHECKED FOR LEAKS WITH A LEAK DETECTOR. ALL SERVICE VALVES ARE OPEN. WATER HAS BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE. YES (DO NOT START UNIT IF VOLTAGE IMBALANCE IS GREATER THAN 2%. EVAPORATOR FANS ARE TURNING IN THE CORRECT DIRECTION. AND REPORT ANY LEAKS________________________________________________ 17. YES NO RECORD THE OIL LEVEL(S) ______________________________________________________________ III. 10. CONTACT LOCAL UTILITY FOR ASSISTANCE. 6. 8. 2. CHECK VOLTAGE IMBALANCE: A-B A-C B-C AVERAGE VOLTAGE = (A-B + A-C + B-C)/3 MAXIMUM DEVIATION FROM AVERAGE VOLTAGE = VOLTAGE IMBALANCE = ____________% (MAX. 4. 3. (13. 7. OIL IS VISABLE APPROXIMATELY 1/2 WAY IN THE SIGHT GLASS(ES) OF THE COMPRESSOR. THE SYSTEM HAS BEEN CHARGED WITH THE APPROPRIATE INITIAL CHARGE. CONTROL TRANSFORMER PRIMARY CONNECTION SET FOR PROPER VOLTAGE.Refrigeration System Check 1. ONLY BLEED TXV(S) ARE INSTALLED. THE INDOOR FAN BELTS HAVE THE PROPER TENSION. 15. 5. THE SYSTEM HAS BEEN EVACUATED. DEVIATION/AVERAGE VOLTAGE) X 100 VOLTAGE IMBALANCE LESS THAN 2%. ARE NEAR THE EVAPORATOR. VOLTAGE IS WITHIN UNIT NAMEPLATE RANGE. REPAIR. LEAK CHECK UNIT. 14. EVAPORATOR FAN STATUS SWITCH IS OPERATIONAL. CONTROL TRANSFORMER SECONDARY VOLTAGE = v YES YES YES YES YES NO NO NO NO NO 7. 5. T RGT. 5. Instruction Time ________ hours.A SP. 2.B SST.Start and Operate Machine. RECORD CONFIGURATION SETTINGS.A RAT SAT OAT CTPT CAP.A RGT.B DP. ____________________________________ 9.A SCT.B CL-3 . FINISH CHARGING ACCORDING TO THE CHARGING CHART PROVIDED. CHECK REFRIGERANT AND OIL CHARGE. COMPLETE COMPONENT TEST. RECORD COMPRESSOR OIL LEVELS AFTER INITIAL RUN. 7. 4. OPERATING DATA: RECORD THE FOLLOWING INFORMATION FROM THE PRESSURES AND TEMPERATURES MODES WHEN MACHINE IS IN A STABLE OPERATING CONDITION: PRESSURE/TEMPERATURE CIRCUIT A DISCHARGE PRESSURE SUCTION PRESSURE SATURATED CONDENSING TEMP SATURATED SUCTION TEMP LIQUID LINE TEMPERATURE* LIQUID LINE PRESSURE DISCHARGE LINE TEMPERATURE* RETURN GAS TEMPERATURE RETURN AIR TEMPERATURE* SUPPLY AIR TEMPERATURE* OUTDOOR-AIR TEMPERATURE CONTROL POINT PERCENT TOTAL CAPACITY *Readings taken with a digital thermometer. YES NO CIRCUIT B DP. YES YES YES YES YES YES YES NO NO NO NO NO NO NO 8. RECORD OPERATING TEMPERATURES AND PRESSURES. 6. OIL LEVELS ARE STILL WITHIN SIGHT GLASS(ES). PROVIDE OPERATING INSTRUCTIONS TO OWNER’S PERSONNEL. RECORD COMPRESSOR MOTOR CURRENT.B SP.B SCT. 3. Complete the Following: 1.A SST. _ _-_ _ CESR-131174._ _-_ _ CESR-131333._ _-_ _ (PRESS ENTER & ESCAPE SIMULTANEOUSLY TO OBTAIN SOFTWARE VERSIONS) CL-4 . COMPRESSOR MOTOR CURRENT COMPRESSOR A1 COMPRESSOR A2 COMPRESSOR A3 COMPRESSOR B1 COMPRESSOR B2 COMPRESSOR B3 L1 L2 L3 CONDENSER FAN MOTOR CURRENT FAN MOTOR 1 FAN MOTOR 2 FAN MOTOR 3 FAN MOTOR 4 FAN MOTOR 5 FAN MOTOR 6 L1 L2 L3 L1 EVAPORATOR MOTOR CURRENT L2 L3 Record Software Versions MODE — RUN STATUS SUB-MODE VERS ITEM MBB MARQ EMM NAVI AUX CXB DISPLAY ITEM EXPANSION CESR-131279._ _-_ _ CESR-131227._ _-_ _ CESR-131171._ _-_ _ CESR-131173.Compressor Running Current — All readings taken at full load. COMMENTS: _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ SIGNATURES: START-UP TECHNICIAN ____________________________ DATE ___________________________________ CUSTOMER REPRESENTATIVE ____________________________ DATE ________________________________________ CL-5 . ......................... Catalog No.......... Form 38AP-1T Pg CL-6 210 11-09 Replaces: New ...........A.-.............................. 04-53380003-01 Printed in U.................S....CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE Manufacturer reserves the right to discontinue.....................Copyright 2009 Carrier Corporation ..................... specifications or designs without notice and without incurring obligations....................................................... or change at any time....