Precision Premium Ovens3050 Series Operation Manual & Parts List Gravity Models OV700G (Small) PR305045G, 40G & 40GCN OV701G (Medium) PR305055G, 50G & 50GCN OV702G (Large) PR305065G, 60G & 60GCN LT2042X2 • 4/8/09 Forced Air Models OV700F (Small) PR305045M, 40M & 40MCN OV701F (Medium) PR305055M, 50M & 50MCN OV702F (Large) PR305065M, 60M & 60MCN Serial Number________________________ Table of Contents Introduction ........................................................................................................................................................ 3 Specifications ......................................................................................................................................................5 Performance Characteristics ........................................................................................................................5 Electrical Requirements................................................................................................................................6 Power Requirements ....................................................................................................................................6 Chamber Volumes ........................................................................................................................................6 Chamber Dimensions ..................................................................................................................................6 Installation ..........................................................................................................................................................7 Selecting a Location ....................................................................................................................................7 Unpacking ....................................................................................................................................................7 Preparing the Oven ......................................................................................................................................8 Power Switch ................................................................................................................................................8 Controls ..............................................................................................................................................................9 Display ..........................................................................................................................................................9 Keypad........................................................................................................................................................10 Operation ..........................................................................................................................................................11 Safety Precautions ......................................................................................................................................11 Limit Alarms ................................................................................................................................................12 Display Offsets............................................................................................................................................13 Service ..............................................................................................................................................................14 Replacing the Door Gasket ........................................................................................................................14 Replacing the Door Handle ........................................................................................................................15 Adjusting the Door Cam ............................................................................................................................16 Accessing the Electronics Compartment....................................................................................................16 Replacing the Heater ..................................................................................................................................17 Replacing the Cooling Fan ........................................................................................................................18 Replacing the Circulating Fan Motor ..........................................................................................................18 Replacing the Controller ............................................................................................................................19 Replacing the Solid State Relay ................................................................................................................20 Replacing the Safety Relay ........................................................................................................................20 Replacing the Control Thermocouple ........................................................................................................21 Troubleshooting ................................................................................................................................................22 Replacement Parts............................................................................................................................................23 Schematic..........................................................................................................................................................24 Warranty ............................................................................................................................................................28 2 Caution Cautions alert you to a possibility of damage to the equipment. The OV700F and OV700G ovens accommodate a maximum of five shelves. In these models. The forced air models provide improved temperature uniformity and control. 3 . Thermo Scientific Precision 3050 Series premium ovens are available in three sizes: small (OV700F and OV700G). Precision ovens incorporate a variety of safety features. the backup will maintain control at 5°C above the set point. then is heated in a plenum below the chamber. All ovens provide PID Microprocessor control at operating temperatures ranging from 50°C (122°F) to 275°C (527°F). An alarm LED then indicates that the backup controller is operating the oven. Exhaust air is vented through a port at the oven top. Heat generated convection then gently moves the air in a vertical circulation pattern. A circuit breaker protects the oven from power surges. A safety backup is built into the controller software: if the primary heater control fails.Introduction Alert Signals Warning Warnings alert you to a possibility of personal injury. an error condition is encountered. medium (OV701F and OV701G) and large (OV702F and OV702G). Hot Surface Hot surfaces alert you to a possibility of personal injury if you come in contact with a surface during use or for a period of time after use. A blower circulates the heated air into the wall plenums and the oven chamber itself in uniform flow patterns. while the OV702F and OV702G each hold eleven. or the temperature is being set. an independent Over Temperature Device will disengage heater operation. Gravity flow models inlet air through a port located under the oven floor. Temperature readouts and control parameters are shown on red LEDs. If primary backup heater controls fail. Three additional LEDs indicate when heater power is being applied. The OV701F and OV701G hold eight shelves. Note Notes alert you to pertinent facts and conditions. Exhaust air is vented through a port at the top of the oven. as well as faster drying. fresh air enters through an air intake on the bottom of the oven. An optional high temperature braided gasket is available for customers using the oven frequently above 250°C. OV700G SPN 101908 OV701F.INTRODUCTION Oven The silicon rubber gasket supplied with the oven is good for continuous use up to 250°C and intermittent use to 275°C. The part numbers of the supplied and optional gasket are listed below: Silicon Rubber Gasket Part # (Supplied with Oven) OV700F. This gasket provides a better seal than the high temperature gasket and is supplied with is supplied with the unit. OV701G SPN 101909 OV702F. OV702G SPN 101910 4 Braided Gasket Part # (High Temp Gasket Optional) SPN 95782 SPN 95783 SPN 95784 . 0 minutes OV702F 2.Specifications Performance Characteristics Operating Range Average Uniformity Forced Air Models Gravity Models Control Resolution Control Sensitivity 50 to 275° @ 200°* +/-3°C +/-4°C 1°C +/-0.0 minutes OV701G 3.5 minutes OV702G 4.0 minutes Rise Time to 275°C OV700F OV700G OV701F OV701G OV702F OV702G Air Exchanges per Hour* OV700F OV700G OV701F OV701G OV702F OV702G BTU/hr Output OV700F OV700G OV701F OV701G OV702F OV702G *as per ASTM E145 **door open one minute 70 minutes 40 minutes 80 minutes 80 minutes 80 minutes 100 minutes 43 24 29 16 22 12 @100°C 1125 470 1325 1040 1325 1150 @200°C 2750 1325 2925 2025 3095 2040 5 .0 minutes OV701F 2.0 minutes OV700G 2.5°C Recovery Time @ 200°C** OV700F 1. 5A. 5. 50/60 Hz 120 V.5A. 1860W. 5. 50/60 Hz 240 V. 1392W. 7.5A. 1800W. 50/60Hz 240 V 7. 7. Installation category II (overvoltage) in accordance with IEC 664. 50/60 Hz 240 V. 1380W. 1392W. 15A. Altitude Limit: 2. 20% to 80% relative humidity. 60Hz 240 V 7. 60 Hz 240 V.5 in Chamber Dimensions (W x D x H) Environmental Conditions Operating: 6 Storage: 17°C to 27°C.8A. 50/60Hz 240 V.5 in 18 x 18 x 20 in 18 x 18 x 26. 15A.8A. 1872W. 5. 1320W. 50/60Hz 240 V. 7. 7.SPECIFICATIONS Electrical Requirements OV700F PR305045M PR305040M PR305040MCN OV700G PR305045G PR305040G PR305040GCN OV701F PR305055M PR305050M PR305050MCN OV701G PR305055G PR305050G PR305050GCN OV702F PR305065M PR305060M PR305060MCN OV702G PR305065G PR305060G PR305060GCN 120 V. 7. 60Hz 240 V.8A. 1800W. 50/60Hz 120 V. 15. 60 Hz 240 V.5A. 1320W. 1800W. 7. 60 Hz 240 V. 50/60Hz 120 V. 1870W. 1320W.5 cu ft 3. 50/60 Hz 120 V. 50/60 Hz 120 V. 11. 50/60Hz Chamber Volumes OV700F & OV700G OV701F & OV701G OV702F & OV702G 2. non-condensing. 1872W.8A.5A. 50/60 Hz 240 V.5A.5A. 1800W. 1800W. 5.0 cu ft OV700F & OV700G OV701F & OV701G OV702F & OV702G 18 x 18 x 13. 11A.5A. Pollution degree 2 in accordance wth IEC 664.8 cu ft 5.5A. 60Hz 240 V. -25°C to 65°C 10% to 85% relative humidity .8A.8A. 15. 1860W. 1870W.000 meters. 1800W. OV702G (four provided) Instruction Manual 7 . x 2 ft. Report any missing items. or 135 lbs. the protection provided by the equipment may be impaired. Selecting a Location The oven requires an area approximately 2 ft. for the OV701F and OV701G ovens. locate each item shown in the list below. for the OV702F and OV702G. Proper electrical power must be available. After unpacking. OV701G (two provided) OV702F. Keep combustible materials away from oven vent hole. The bench selected must be capable of supporting at least 120 lbs. OV702G (two provided) Shelf Supports OV700F. Note If the equipment is used in a manner not specified by the manufacturer. 50/60 Hz 240 V. 50/60 Hz OV702F & OV702G 120 V. OV701F. 130 lbs. for the OV700F and OV700G ovens. OV701G (one provided) OV702F.Installation Warning Do not use top of oven as a shelf. The oven shall have a 2” air clearance on all sides (6” if combustible materials) and a minimum of 24” air clearance on top to allow heat dissipation and prevent temperature build ups. Do not cover oven vent hole. 50/60 Hz Shelves OV700F. In the event of shipping damage. Keep hands away. 50/60 Hz OV701F & OV701G (medium) 120 V. OV701F. OV700G. to your Thermo Scientific branch. Unpacking Thermo Scientific Precision ovens are shipped in a single carton. Hot Surface Oven vent and exiting air are hot. Item Oven Assembly OV700F & OV700G (small) 120 V. retain the shipping material and file a claim with the final carrier. by name and part number. Locate the oven such that no extension cord is required. 50/60 Hz 240 V. OV700G. 50/60 Hz 240 V. Connect the line cord to an appropriate electrical outlet. current and line frequency specifications. then return it to the on position. 2. eliminating the need for separate fusing. The oven is now ready for operation. Install the shelf. No preliminary adjustments or calibrations are required. Check that the power requirements of the oven will not overload the circuit to which it will be connected. Depending on the customer application and customer laboratory procedures an initial calibration may be done at this point. 4. The circuit breaker will interrupt power in the event of an oven heater malfunction. Press the I (upper) half of the rocker-type power switch to the in position to turn the oven on. To reset the breaker. Preparing the Oven To prepare the oven for operation. 3. Press the 0 (lower) half to the in position to turn off oven power. perform the following procedures: 1. Make certain all packing material has been removed from oven chamber.INSTALLATION Caution See data plate on oven for voltage. 8 . (See Display Offsets) Power Switch The 3050 Series ovens feature a front panel mounted power switch which is a Switch combination power switch and circuit breaker. first place the switch to the off position. Three smaller LEDs indicate. in the operating sections of the manual. In the normal operating mode. Lights when the control temperature is being set. when required. one-half inch LED numeric display which reads out the oven temperature. During programming. . Display Figure 1: Display Fields Temperature Display Heat Indicator Alarm Indicator Program Indicator 9 The 3050 Series controller features a bright. respectively. Lights when power is being supplied to the oven heater. More detailed descriptions are provided. indicates the oven set temperature target.Controls The following sections briefly describe the locations and functions of various display fields and keypad controls. shows the current oven temperature. Lights if the actual oven temperature exceeds the alarm temperature. an alarm condition. that power is being applied to the oven heaters or that the control temperature is being set. Each display field is discussed separately below. The alarm temperature is factory-adjusted to be 5°C above the set temperature. Used with INCREASE and DECREASE to change the set temperature. as indicated on the temperature display. Pressing MENU while holding down the SET key decreases the oven set temperature. as indicated on the temperature display. tactile keypad. 10 . Pressing DECREASE while holding down the SET key decreases the oven set temperature. as indicated on the temperature display. Pressing INCREASE while holding down the SET key increases the oven set temperature. Pressing SET causes the display to show the set temperature.CONTROLS Keypad Figure 2: The Keypad The 3050 Series incorporates a four-key. With MENU to access entry of a temperature display offset. The function of each key is discussed individually below. Before operating ovens. 5. To set a temperature. 6. press INCREASE while holding SET. 2. When the desired set temperature is shown. For example: A plastic container on the heater cover may become hot enough to melt/burn the container at settings below the melting point of plastic. To increase the set temperature. 4. Finally. Care should be taken to maintain a neutral PH at all times. release the SET key. Do not place items on the heater cover. Wear insulated gloves. Use tongs. The oven automatically begins to control at the set temperature. Note To rapidly increase or decrease the set temperature press and hold the appropriate arrow key. . All 8s will flash as a test of the display.Operation The 3050 Series ovens maintain a set temperature until that set temperature is changed. The heater for the unit is in the bottom of the unit. To decrease the set temperature. release the INCREASE or DECREASE keys. press and immediately release the arrow key. Never stand in front of an open oven. 3. Safety Precautions • • • • • 11 • • This unit is not explosion proof. Fire or explosion may result. Use safety goggles. Do not use in the presence of flammable or combustible materials. press DECREASE while holding SET. perform the following: 1. Observe the set temperature in the display window. Unit contains components that may ignite such materials. To slowly increment or decrement the set temperature one degree at a time. Press and hold the SET. Place the power switch in the ON position. Surface temperatures at the bottom cover of the unit may be higher than set point temperature. always observe the following safety precautions: Fumes and spillage from acidic solutions cause corrosion of the stainless steel chamber. Example: First experiment samples were being soaked at 160°C. The oven immediately goes in to alarm once the set point is reset to 140 from 160.1). • • The reference point for the alarm is the set temperature. the alarm will trip at 155°C. the alarm indicator LED will light and the display will indicate EEE. The oven will stay in alarm until the oven temperature cools down to 144. 12 . Example:If the set temperature is 150°C. Any change in the set temperature will cause a corresponding shift in the alarm temperature.OPERATION Limit Alarms The 3050 Series controllers feature a deviation alarm which alerts the operator and and interrupts heater power whenever the actual oven temperature differs from the set temperature by more than 5°C. • If the actual temperature exceeds the alarm limit. Changing the set temperature to a value more than 5°C below the present oven temperature will trip the alarm. The set limit is built in to the controller and cannot be changed. the alarm will follow the set temperature and trip at 205°C. Power is removed from the heaters when an alarm condition occurs. Experiment completed and oven reset to 140°C.9° (140+5-. If the set temperature is changed to 200°C. Press INCREASE or DECREASE until the display indicates the desired offset. the display will indicate CAL 2. 4. The displayed temperature is the result of algebraically adding the actual temperature to the offset value.OPERATION Display Offsets The 3050 Series controllers permit the operator to select a display offset Offsets temperature. With a display offset entered. Thus. 3. To enter a display offset. The oven cools to 150°C the display reads 150 and the calibrated thermometer reads 150. press and hold the SET key. if an offset of -3 degrees is being used. To change the display offset. A test is to be performed at 150°C in the center of the oven and temperature is critical. Functionally. A display offset of 1 is entered. Release the SET key. Press MENU once to return to normal temperature control. carry out the following steps: 1. 2. Place a thermometer or thermocouple (calibrated) at the critical point and set the oven to 150°C and allow the oven to stabilize. 13 . the temperature displayed will be the actual oven temperature (measured at the control thermocouple) plus or minus the display offset selected. Press the MENU. the offset feature permits the operator to measure and calibrate such that the display will indicate the temperature at a specific point or zone within the oven. To view the present offset value. The immediate display reads 151. 5. The calibrated thermometer reads 151°C. press and hold the SET key. a measured temperature of 50 degrees will be displayed as 47 degrees. Examples: 1. Note the joint position of the old gasket. The following sections describe procedures for servicing the 3050 Series ovens. The second section. Lay door on a flat surface with the handle over the edge. all other service procedures involve potential exposure to line voltage. Set the power switch to off position and open chamber door. Accessing the Electronics Compartment. Carefully remove and retain hardware from door hinges (case side). NOTE: Study the method of door gasket attachment before starting disassembly. Caution Allow oven to cool to ambient temperature before attempting repair. The first procedure. contact the customer service dept. may be performed by most users. Should the gasket become defective or be damaged. These procedures should be undertaken only by qualified service personnel. Failure to use factory authorized replacement components will void warranty and could result in unit malfunction and or hazardous operating conditions. it may be replaced by following the procedures below. 3. This understanding will avoid confusion later in this process. 1. 7. Loosely install two screws through the stainless steel liner and into the door wrap to align these pieces. describes procedures required for subsequent service sections and is referenced by these later sections when required. at 1-800-553-0039 Replacing the Door Gasket The Precision 3050 Series ovens incorporate a durable. Remove the old door gasket. or for warranty service. Replacing the Door Gasket. Caution Only factory authorized components should be used for all repairs. In the event service is required beyond that available by the customer. Begin installing the replacement gasket at the joint position of the old gasket. This is where the new gasket installation will start. 2.Service Caution Service procedures requiring access to the electronics compartment involve exposure to line voltage and should be done only by qualified service personnel. 5. However. Disconnect oven from power source before attempting repairs. Bend back the old door gasket and remove the Phillips head screws attaching the gasket. 4. 14 Open door fully. 6. Stretch the replacement gasket around the corners of the . silicone door gasket to minimize heat loss. Install a Phillips head screw as the gasket rounds each corner to keep the gasket properly stretched. (The screw goes through the liner.SERVICE 8. Secure latch cover in place with two screws. liner to avoid bunching up of the gasket material. 2. the door cam may require adjustment. Replacing the Door Handle To replace a defective door handle. Remove the two mounting screws holding latch cover in place. stretch the gasket slightly if necessary. 15 . pierces the gasket and threads into the door wrap. To facilitate proper closing and sealing of door. Adjusting the Door Cam Due to handling in shipment or to heat distortion with use. 5. perform the steps below: NOTE: See caution above. Mount the replacement handle using two screws. perform the following: 1. Make sure there is no gap at the gasket joint. 4. 9. Adjust bottom nut (13/16) from end of shaft. 3. 1. Remove the two mounting screws holding defective handle in place. steps 1 through 6 may have to be performed concurrently. Open door and remove screws holding latch cover in place. 2. Locate nuts securing tongue on cam shaft.) After all four corners are secured. To adjust the door cam. Reinstall the door onto the case with hinges. install the remainder of the Phillips head screws. Caution Allow oven to cool to ambient temperature before attempting repair. 10. proceed as follows: (See sketch on next page. Slide the oven back on the table plus a few inches (to set the bezel on the bench) and rotate the bottom of the bezel out from the oven. one full turn clockwise draws door 1/16” closer to cabinet when door is closed. Use shims between one and one-half and two inches in thickness. Carefully set the bezel on the bench. Accessing the Electronics Compartment To access the electronics compartment. 6. 3.) 1. 16 Loosen but do not remove outside nut. Prop up the oven front by placing a shim under each front foot. The top clips will come loose but the wiring will still be connected. Disconnect oven from power source before attempting repairs. Caution Service procedures requiring access to the electronics compartment involve exposure to line voltage and should be done only by qualified service personnel. Carefully remove and retain hardware from door hinges (case side). Disconnect power cord from the electrical outlet. Secure cam tongue in place by tightening outside nut. Remove the screws securing bezel from bottom of oven. 2. Open the chamber door. Secure latch cover in place with two screws. . 4. Adjust inside nut. Set door aside.SERVICE 3. 5. 4. 5. Slide the oven forward until the front of the bezel (control panel) is at least three inches from the edge of the bench top (or the oven feet are at the edge of the bench). 6. 7. Remove the two screws that secure the heater cover. 17 . then slide heater back and lift out. lift back of heater up. then pull the lead terminals off the heater studs. Disconnect power cord from the electrical outlet. Disconnect oven from power source before attempting repairs. 5. 3. proceed as follows: 1.SERVICE Heater Cover Fascia Bezel Front Face Bottom Screws Caution Allow oven to cool to ambient temperature before attempting repair. Remove the two screws securing heater to cabinet. Slide heater forward to disengage back heater clips. Remove the cover by lifting and sliding it forward. Caution Service procedures requiring access to the electronics compartment involve exposure to line voltage and should be done only by qualified service personnel. It may be necessary to use a flat-blade screwdriver to assist in lifting the cover upward. Set heater cover aside. Replacing the Heater Heater Electronics Compartment (Open) Bezel/Control Panel To replace a defective heater. 2. Remove the two nuts and shake proof washers securing the heater leads. 4. Install replacement heater and reassemble oven by generally reversing the steps above. make certain air flow arrow molded into fan housing points into the oven chassis. Locate the two electrical leads from the fan motor. Note When installing the replacement fan. Remove the leads from the push-on terminal strip located in the front of the oven bezel. Detach the controller housing (oven bottom) by removing the eight screws which fasten it to the cabinet. 3. Complete the procedures discussed in Accessing the Electronics Compartment. Replacing the Circulating Fan Motor To replace a defective circulating fan motor. loosen set-screw holding the fan blade onto the motor shaft. 5. 18 6. proceed as follows: 1. Remove the three mounting screws holding the fan in place. Remove the two fan power wires from push-on terminals located on fan housing. Lay the oven on its back with the oven bottom facing forward. Note and observe all Caution statements. 4. Two screws are located on each side of the oven and four on the bottom of the oven. Using an Allen wrench. Install replacement fan and reassemble oven by generally reversing the steps above. Caution Sheet metal in this area is sharp. Complete the procedures discussed in Accessing the Electronics Compartment and Replacing the Heater steps 1 & 2 (remove the heater cover). 4. 2. 3. Work carefully. 2.SERVICE Replacing the Cooling Fan To replace a defective cooling fan. proceed as follows: 1. Locate the two access holes for the motor . Observe the shaft has a flat side to prevent the set-screw from turning on the shaft. 19 . Remove four screws that hold controller to bezel. Note color and location of wires. 120V or 240V. gently pushing aside the oven insulation until the nut driver reaches the front motor mounting nut. Push an 11/32-in nut driver through the front access hole. then remove old controller. in front of and in back of the motor shaft. Install new replacement controller and reattach wires previously removed.SERVICE 7. proceed as follows: 1. 5. Check switch DS1 setting: If forced air. Install replacement fan motor by generally reversing the steps above. i. 9. Caution Allow oven to cool to ambient temperature before attempting repair. Replacing the Controller To replace a defective controller. then repeat process using back access hole to remove back motor mounting nut and washer. Disconnect oven from power source before attempting repairs. remove all wires connected to controller. 4.. mounting nuts located in the oven floor. Check wiring connections against schematic. Remove front nut and washer. 8. Complete the procedures discussed in Accessing the Electronics Compartment. Switch B should always be OFF. 3. Locate terminal blocks on controller. set to OFF for gravity. 10. making sure that the line power wire is attached to the proper terminal. Remove the fan motor by sliding it out. otherwise. 6. Caution Service procedures requiring access to the electronics compartment involve exposure to line voltage and should be done only by qualified service personnel.e. set switch A to ON. 2. making certain that the thin. Remove two Phillips screws which mount the solid state relay to the bezel. Disconnect oven from power source before attempting repairs. Caution Service procedures requiring access to the electronics compartment involve exposure to line voltage and should be done only by qualified service personnel. . 20 Consult the schematic and locate the safety relay (mounted on bezel). Put new solid state relay in place. 5. 2. Complete the procedures discussed in Accessing the Electronics Compartment. Lift out the solid state relay. Remove four lead wires from their screw-down terminals. 4. Lift out the safety relay. Remove two Phillips screws which mount the safety relay to the bezel. Remove four lead wires from their push-on terminals. 6. conductive pad remains between the solid state relay and the bezel. 2. 3. Generally reverse the steps above to re-assemble oven. proceed as follows: 1. proceed as follows: 1. Generally reverse the steps above to install the replacement safety relay and re-assemble oven. Consult the schematic and locate the solid state relay (mounted on bezel). Complete the procedures discussed in Accessing the Electronics Compartment.SERVICE Caution Allow oven to cool to ambient temperature before attempting repair. 4. Replacing the Safety Relay To replace a defective safety relay. 5. Replacing the Solid State Relay To replace a defective solid state relay. 6. 3. . Caution Verify the yellow thermocouple conductor is under the (+) tab and the red thermocouple conductor is under the (-) tab. On roof of oven. Then. Wrap tape over the length of the loops to secure them. Gently pull the defective thermocouple out through the electronics compartment while guiding (“fishing”) the replacement thermocouple into place. 2. exposing roughly a 6-inch section of the thermocouple wire. which holds thermocouple in place.SERVICE Caution Allow oven to cool to ambient temperature before attempting repair. 6. locate the clip. Complete the procedures discussed in Accessing the Electronics Compartment. 21 7. Consult schematic at end of this manual. Cut the thermocouple wire to remove the thermocouple sheath. Remove thermocouple wires from the controller 6 terminal connector by loosening the two screws. Securely loop together the cut end of the defective thermocouple with the two leads of the replacement thermocouple. Replacing the Control Thermocouple To replace a defective control thermocouple. 4. Disconnect oven from power source before attempting repairs. 2. proceed as follows: 1. 3. observing all Caution statements. Remove thermocouple from clip. Caution Service procedures requiring access to the electronics compartment involve exposure to line voltage and should be done only by qualified service personnel. 5. Pull thermocouple forward into oven chamber. generally reverse steps 1 through 3 to complete installation of new thermocouple and reassemble oven. Symptom Probable Cause Action No power Oven temperature erratically high Failure to heat Unit not plugged in or turned on Defective circuit breaker Plug in or turn on Replace circuit breaker Set temperature less than actual temperature Refer to Operation Defective control thermocouple Defective control thermocouple Poor heater connections Defective heater element Defective controller Defective solid state relay Over Temperature Device Disengage or Defective Alarm LED stays on and control is higher than set temperature Set display shows “EEE” Temperature off from Independent thermometer 22 Set temperature has been changed to a value less than the actual temperature minus the high alarm limit Defective controller Replace control thermocouple Replace control thermocouple Tighten connections at terminal strip Check heater resistance on schematic at back of manual. Replace controller Refer to schematic and replace relay or safety relay Reset or replacement of the Over Temperature Device is to be performed by factory authorized personnel only. The service discussed below is beyond the scope of most users and should be performed by qualified and trained personnel. See Display Offsets. Disconnect power and contact Thermo Fisher. contact the customer service department at 1-800-553-0039. Begin by setting offset to 0. Wait for actual temperature to cool to the set temperature Replace controller Defective solid state relay or safety relay Refer to schematic and replace relays Defective control thermocouple Replace control thermocouple Set temperature has been changed to a value less than the actual temperature minus the high alarm limit Faulty or broken connections Wait for actual temperature to cool to the set temperature Check thermocouple connections at rear of temperature controller Calibration off set needs adjusted.Troubleshooting This table is intended to assist in resolving oven problems by relating symptoms to their likely causes. Replace heater unless approximately the same as schematic. In the event service is required beyond that available by the customer. . OV702 (240 V) Circuit Breaker Single Pole (120 V) Double Pole (240 V) Door Assembly OV700 (Small) OV701(Medium) OV702 (Large) Part Number (ref) CRX121 CRX123 CRX117 PCX132 SPN 95603 FAX39 FAX40 SPN 95788 SPN 95789 SPN 104976 13-247S SPN SPN SPN SPN 95695 (HTR) 95736 95696 95737 SPN 101908 SPN 101909 SPN 101910 SPN 95782 SPN 95783 SPN 95784 SPN SPN SPN SPN 95770 (K1) 95787 95765 (S1) 95786 DR2034X8 DR2033X8 DR2032X8 23 . OV702 (120 V) OV700.Replacement Parts Note Only factory authorized components should be used for repair. OV702F. Replacements for oven parts may be ordered. OV702G (120 V) OV701F. OV701 (240V Intʼl) OV700. from Customer Service at 1-800-553-0039. OV701. OV702F. OV702G (240 V) Door Gasket OV700 OV701 OV702 Door Gasket Gray Silicon Optional High Temp OV700 OV701 OV702 Solid State Relay SPN 83917 (SSR) Safety Relay OV700. OV701. OV700G (240 V) OV701F. OV701. OV701G. OV701. OV701. OV700G (120 V) OV700F. by part number. OV701G. OV701 (240V China) Temperature Controller (120 V / 240 V) Thermocouple Assembly Cooling Fan 120 V 240 V Circulating Fan Motor 120 V 240 V Door Handle Shelf Kit (Fits All Ovens) Heater Assembly OV700F. Item Line Cord and Plug OV700. OV702 (120 V) OV700. Schematic 24 . 25 . The Technical Services Department must be contacted for warranty determination and direction prior to performance of any repairs. Replacement or repair of components parts or equipment under this warranty shall not extend the warranty to either the equipment or to the component part beyond the original warranty period. During the first year component parts proven to be non-conforming in materials or workmanship will be repaired or replaced at Thermoʼs expense. WHETHER WRITTEN. labor included. operation and preventive maintenance. Thermo shall not be liable for any indirect or consequential damages including. maintenance. service and special application. Expendable items. NO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL APPLY. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES. Printed instruction manuals carefully detail equipment installation. damages relating to lost profits or loss of products. At Thermoʼs option. please call your Technical Services Department at 1-800553-0039 (USA and Canada) or 1-563-556-2241. Your local Thermo Sales Office is ready to help with comprehensive site preparation information before your equipment arrives. filters and gaskets are excluded from this warranty. operation. Installation and calibration are not covered by this warranty agreement. contact your local distributor for warranty information. all non-conforming parts must be returned to Thermo Scientific postage paid and replacement parts are shipped FOB destination. ORAL OR IMPLIED. This allows for shipping time so the warranty will go into effect at approximately the same time your equipment is delivered. Weʼre ready to answer your questions on equipment warranty.THERMO SCIENTIFIC STANDARD PRODUCT WARRANTY The Warranty Period starts two weeks from the date your equipment is shipped from our facility. The Technical Services Department must give prior approval for return of any components or equipment. without limitation. Outside the USA. If equipment service is required. The warranty protection extends to any subsequent owner during the first year warranty period. 26 . glass. The warranty protection extends to any subsequent owner during the first year warranty period. At Thermoʼs option. Installation and calibration are not covered by this warranty agreement. ORAL OR IMPLIED. service and special application. Printed instruction manuals carefully detail equipment installation. Thermo shall not be liable for any indirect or consequential damages including. During the first year component parts proven to be non-conforming in materials or workmanship will be repaired or replaced at Thermoʼs expense. contact your local distributor for warranty information. Replacement or repair of components parts or equipment under this warranty shall not extend the warranty to either the equipment or to the component part beyond the original warranty period. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES. 27 . The Technical Services Department must be contacted for warranty determination and direction prior to performance of any repairs. operation and preventive maintenance. If equipment service is required. Outside the USA. operation. without limitation. The Technical Services Department must give prior approval for return of any components or equipment.THERMO SCIENTIFIC INTERNATIONAL DEALER WARRANTY The Warranty Period starts two months from the date your equipment is shipped from our facility. glass. Weʼre ready to answer your questions on equipment warranty. WHETHER WRITTEN. maintenance. provided the warranty card is completed and returned to the Technical Services Department. Your local Thermo Sales Office is ready to help with comprehensive site preparation information before your equipment arrives. labor excluded. Expendable items. damages relating to lost profits or loss of products. This allows for shipping time so the warranty will go into effect at approximately the same time your equipment is delivered. filters and gaskets are excluded from this warranty. please call your Technical Services Department at 1-800553-0039 (USA and Canada) or 1-563-556-2241. NO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL APPLY. all non-conforming parts must be returned to Thermo postage paid and replacement parts are shipped FOB destination. Dealers who stock our equipment are allowed an additional six months for delivery and installation. com 28 . Dubuque. IA 52001 United States www.thermo.Thermo Scientific 2555 Kerper Blvd.