EA900II maintenance manual（1---3KVA）.pdf

EA900II Series DigitalHigh-frequency UPS 1—3KVA Maintenance Manual V1.0 GuangDong East Power Co., Ltd., UPS Product Department Contents   1. Introduction ................................................................................... 1  1.1 Product overview ................................................................. 1  1.2 Product appearance (1-10KVA) ........................................... 2  1.3 Product features ................................................................... 2  2. Brief introduction of product principle and internal structure ....... 6  2.1 System functional block diagram ........................................ 6  2.2 Schematic circuit diagram ................................................... 6  2.3 Graphical illustration for product’s internal architecture ..... 8  2. 3.1 Introduction of the UPS backboard ......................... 8  2.3.2 Description of the internal structure of 1-3KVA type9  2.4 List of PCB board inside UPS ........................................... 11  2.4.1 List of 1KVA PCB board ........................................ 11  2.4.2 List of 2KVA PCB board ........................................ 11  2.4.3 List of 3KVA PCB board ........................................ 11  3. PCB working principle and port definition ................................. 12  3.1 DSP control board ............................................................. 12  3.2 Description of the signal end of main control board ......... 12  3.3 Power board ....................................................................... 19  3.4 Description of the signal end of power board .................... 22  3.5 Long backup type charging board ..................................... 29  4. EA900II series UPS installation, switch and precautions............ 33  -1- 5. Description of UPS panel function and mode setting .................. 38  6. Description of UPS working mode .............................................. 46  7. List of LED and LCD display alarms .......................................... 49  8 Troubleshooting ............................................................................ 51  9. Precautions for battery handling .................................................. 62  10. Network communication ........................................................... 62  11. Description of communication interface.................................... 63  -2- advanced DSP control. insurance. transportation. applicable to sectors like the finance. security. As a new generation of high-frequency UPS characterized by its reliability. tax administration. data centers. featuring a serial of precision and maturity design such as input power factor correction. complete protection measures. Introduction 1. UPS can. excellent network management and rational HMI. With the advanced full digital control.1.1 Product overview EA900II series high-frequency UPS is a brand-new intelligent high-frequency UPS. continuously provide clean and uninterrupted power supply with stable voltage and frequency. 1 . our product can meet the high requirement by a variety of fields for UPS. network management centers and precision equipments. The series of UPS is mainly employed to provide reliable and ideal AC UPS for all computers. safety and maintainability. government and enterprises. integrating the high-performance pure digital control and double conversion on line structure. telecommunication. in case of main power failure. Turn to the bypass work mode after 1min 108%～125% load. full digital control of rectification and inversion. able to set output voltage value and ECO via LCD panel. 2 . the rating frequency will be 60HZ by default. ◆For single-phase series.3 Product features ◆DSP digital control.2 Product appearance (1-10KVA) 1. dry contact. the rating frequency will be 50HZ by default. input harmonic current is less than 6%. ◆Fault diagnosis function. ◆Overload capacity: continue working for a long term in case of less than 108%. ◆Double-sided power boardallows for more reliable and stable machine performance. RS485 and SNMP are optional. EPO port. ◆Colorful LCD display contents. featuring visual and explicit display of data. able to determine the fault reason by the displayed code and quickly find the fault location. ◆Output standard configuration is RS232 communication port. Turn to the bypass work mode after 30s 108%～125% load Turn to the bypass work mode after 200 ms 150% load. ◆54x35mm display screen. reducing the feedback interference of UPS and relatively energy-saving. ◆50Hz/60Hz frequency self-adaption: in case the first main power frequency ranges 45-55HZ. communication ways like USB. in case it ranges 55-65HZ.1. it is able to set ECO function (economic mode). input current harmonic distortion less than 6%. and conversion efficiency bigger than 90% under main power mode and 87% under battery mode. output voltage harmonic distortion less than 5%. under main power mode and full-load condition.2 Electrical performance of product Model Nominal capacity EA901II EA902II 1KVA 2KVA EA903II 3KVA Input Specification Rated input voltage 220V Rated input frequency 50Hz/60Hz self-adaption 120～300VAC (Half load) 140～300VAC (Full load) 45-55Hz+/-0. ◆Via the panel.1A 6A over-current 12A protector over-current protector 3 12. ◆Battery number is reduced to two.◆Batter mode DC-DC converter can be switched from analog control to digital control.5% 50Hz Input voltage range Input frequency range 55-65Hz+/-0.0A ≥0. the machine features the input power factor bigger than 0. with efficiency up to 95%.1A 15A over-current protector . ◆Wider voltage range (100-300vac).98 Input standard current (Linear full load Input protection Rated current protection 60Hz 4.98. ◆Better machine performance index.99 8.3.5% Phase number Single-phase +N+GND Power factor correction ≥0. 1. four and six. input voltage LOSS point can be 140vac. relatively reducing the cost of standard type. Under rated nonlinear load. Turn to bypass working mode after 200ms load more than 150%. 4 .2）Hz ≤1Hz/s It is< 3% when under linear full load and < 5% when under nonlinear full load. able to set via LCD panel Output voltage Output power factor 0.8 Output power (VA/Watt) 1000/800 Voltage regulation precision Output DC component voltage Load peak ratio Bypass output prior to startup 2000/1600 3000/2400 ±1％ ≤200mv 3:1 No bypass output by default.Input current harmonic distortion ﹤6% Bypass voltage range ﹤5% 186VAC-252VAC (Modifiable) Output Specification 208VAC/210VAC/220VAC/230VAC/240VAC. settable Output frequency Under main power mode Under battery mode Phase locking velocity Total voltage harmonic distortion Similar to the input frequency （50/60±0. Conversion time From main power mode to battery mode 0ms From battery mode to main power mode 0ms From main power mode to bypass mode ＜4ms From bypass mode to main power mode ＜4ms ECO mode conversion power failure ≤10ms Main Overall efficiency Over-load capacity power ≧90 % Battery full-load ≧87% ECO mode ≧94% full-load Turn to bypass working mode after one minute 108%～125% load. Turn to bypass working mode after 30s 108%～ 125% load. Surge protection IP20 Protection grade Physical property Working 0 ～ 40 ℃ temperature Operation environment Storage -25℃ ～ 55 ℃ temperature Working 20 ～ 90% (no water condensation) humidity 5 .5mA. long backup type 6A Working environment Output voltage Charge mode Charging time Input voltage range Charging current >2M(500VDC) Insulation resistance ( (Input and output to ground) 2820Vdc. Charger (27. namely the ability to withstand 1.2/50us+8/20us combination wave is no less than 6KV/3KA.4)VDC (55±0. no flashover.5±0.6)VDC (82.5±0. 1min..9)VDC Three-stage charge Depending on battery capacity 80VAC~300VAC Standard type 1A. while the long backup type should depend on the battery capacity.Auto restoration function Yes Battery Battery type Omniseal maintenance-free lead-acid battery DC rated voltage (V DC) Built-in battery of the standard type 24V DC 48V DC 72V DC 7AH/12V 7AH/12V 7AH/12V 2 4 6 Number of battery (PCS) Back-up time Standard type half-load ≥5min. leakage current is less than 3. Insulation strength Meet the IV grade installation site requirement specified by IEC60664-1. when exceeding 1500m. use via derating.1 (1-3KVA) Schematic circuit diagram 6 . the EA900II series UPS is in serial connection between the power distribution system and load. Brief introduction of product principle and internal structure 2. The system design is applicable to provide the clean and uninterrupted power for the load and power distribution system even the upper line end of the AC power is interfered.2.2 Schematic circuit diagram 2.Altitude 0m＜altitude＜1500m. Noise ＜50db 2.1 System functional block diagram As the single-input single-output UPS. 2. when under normal condition. UPS will incessantly switch to the bypass mode to provide continuous voltage for the load. When main power is under abnormal condition (exceeding UPS main power input range or power failure). and then converts it into AC power for the load through DC/AC inverter circuit.As shown in the schematic circuit diagram. In case of any internal fault. the energy stored by the battery will provide DC voltage through DC boost circuit to the bus and convert DC bus voltage into AC voltage by inverter and then output the AC voltage. the main power generates bus voltage through the PFC boost circuit. 7 . 2.3 Graphical illustration for the product’s internal architecture 2.1 Introduction of the UPS backboard Communication 通讯介面 interface Intelligent network card 智能插槽 slot 智能网卡插槽 Surge protection socket 浪涌保护插座 TEL/MODEM/FAX Output socket 输出插座 Over-current protector RESET O T 过流保护器 RESET Input power输入电源 source Battery input 电池输入 (长效机) (long backup type machine) +1KVA Intelligent network card slot Communication 通讯介面 interface 智能网卡插槽 Surge浪涌保护插座 protection socket TEL/MODEM/FAX Output socket 输出插座 输入电源 Input power source R E SE T O T 过流保护器 R E SE T Over-current protector Battery input (long 电池输入 (长效机) backup type machine) +- 2/3KVA 8 . 3. 2.2 Description of the internal structure of 1-3KVA type Long backup type charging board TVSS board Control board Power board Input filter 1KVA 9 .3. Control board Power board TVSS board Output filter Long backup charging board Input filter 2/3kVA 10 type . surge protection board Circuit board.0060500 900II-LCD(ZCM1674) C.4B.41.24V.41.320W (for long backup type) C.4.72V.1 List of 1KVA PCB board Code C.Charging board MOD_CHGR_NO.7301000 Name of material Circuit board.4B.4 List of PCB board inside UPS 2.0010000 C.42.4100000 Circuit board.display board Circuit boardcommunication interface board 900II-LCD(ZCM1674) C.7260000 Circuit board.46.41.output filter Circuit board.46.0060500 Circuit board.7260000 Circuit board.46.4160121 Model TVSS EA801-8A interface board 11 .display board Circuit boardcommunication interface board Circuit board.Charging board 3K O/P EMI MOD_CHGR_NO.41.control board 1-3K CNTL C.0060500 900II-LCD(ZCM1674) C.2.display board Circuit boardcommunication interface board Circuit board.power board EA901NH PSDR (for long backup type) C.4160101 Circuit board.power board EA903NS PSDR (for standard type) C.02_V00，150VAC-300VAC ip.Charging board 3K O/P EMI MOD_CHGR_NO.surge protection board Circuit board.4200200 Circuit board.41.input filter 3K I/P EMI C.48V.3 List of 3KVA PCB board Code C.42.45.7140000 C.4A.4200320 Circuit board.power board EA902NH PSDR (for long backup type) C.7140000 C.surge protection board Circuit board.41.7160004 Name of material Circuit board.45.4160111 Model TVSS EA801-8A interface board 2.4A.0010000 Model TVSS EA801-8A interface board C.output filter Circuit board.power board EA901NS PSDR (for standard type) C.480W (for long backup type) C.02_V00，150VAC-300VAC ip.45.4100000 Circuit board.49.power board EA902NS PSDR (for standard type) C.input filter 3K I/P EMI C.49.49.0010000 C.2 List of 2KVA PCB board Code C.42.control board 1-3K CNTL C.4200300 Circuit board.49.7140000 C.control board 1-3K CNTL C.49.160W (for long backup type) 2.4.49.4.4100000 Circuit board.4A.4200210 Circuit board.02_V00，150VAC-300VAC ip.input filter I/P EMI C.power board EA903NH PSDR (for long backup type) C.4200310 Circuit board.4200330 Circuit board.7301000 Name of material Circuit board. PCB working principle and port definition 3.3.2 Description of the signal end of main control board 3. It is the core part of UPS.1 Main control board CN618 Connect to LCD display board 12 .2.1 DSP control board Control board is mainly composed of a 16-digit DSP controller and peripheral operational circuit. principally responsible for sequential control and PWM computation as well as the display and communication. 3. 2. DC.2 Main control board CN10 EPO functional interface 3.2.2.3 Main control CN7 Special interface for burning program 3. INV driving signal. connecting to power boardCN1. 13 .3.4 Main control board CN11 PFC. 14 . 2.3.6 Main control board CN2 Connect to RS232. 15 . connecting to the power board CN2 3.5 Main control board CN5 Sampled signal.2. 3.7 Main control board CN8 Connect to the long backup type charging board.2.8 Main control board CN4 Reserved 3.2.10 Main control board CN800 16 .2. 3.9 Main control board CN3 Connect to the built-in SNMP card.2.3. Main power voltage flows through the dropping resistor (on the power magnifier board).e. connecting to generator) on the sing wave zero-crossing due to poor main power wave.Burning power interface 6. 1) Zero-crossing detection circuit As the main power and inverter employs the same zero-crossing detection circuit. the main power zero-crossing detection circuit is taken as the example. D10 is added to prevent the conversion of CPU signal into negative voltage. R44 and R43 forms the Schmidt link to prevent the misoperation caused by the vibration (i. BUS voltage detection. Description of control board circuit The control board can be used for main power voltage amplitude and frequency detection. the sine signal. battery voltage detection. load detection and inversion inductive current detection. 17 . after being attenuated by a proportional amplifier. inversion output voltage and frequency detection. Figure 16 Circuit generated by the reference sign wave of inverter 4) Battery voltage detection circuit 18 . which is sent to the main board via dropping resistor.2) Amplitude detection circuit As the main power and inverter employs the same amplitude detection circuit. the main power amplitude detection circuit is taken as the example. 3) BUS voltage detection circuit BUS voltage detection circuit is used to detect the DC current around positive and negative 350V. BUS voltage is stabilized. and fault alarm will be given in case of higher or lower BUS voltage. After constant detection of BUS voltage amplitude. and the main board sends it via the following difference channel to DSP. BUS voltage detection.4 Power board DC boosting module board PFC/INV driver board SPS power board Fan module board 1KVA power board 19 . Standard type charging board 3.No further description is provided since the main power voltage amplitude and frequency detection. battery voltage detection. inversion output voltage and frequency detection. load detection and inversion inductive current detection are mostly identical to each other. INV module board 3KVA power board 20 of .SPS module board Fan baord module INV inversion module board DC module board Module board stanndard PFC. 2KVA power board Main power sections of the power board: 1. Include the DC boosting, main power PPC boosting, DC filter, inversion output and bypass. 2. PFC, NV driver module (PFC is identical to the INV driver module), battery DC boosting module, SPS power module, fan detection module and charging module (standard type power board). 3. Main power voltage sampling circuit, output voltage sampling circuit, BUS voltage sampling circuit, main power zero and live line reversion detection circuit, and batter voltage sampling circuit. 4. PFC power factor correction Definition of power factor Power factor refers to the ratio of active power to apparent power. PF=P/（VRMS*IRMS） Two reasons may affect the power factor: first, the phase difference between voltage and current. If voltage and current is a standard sine wave, PF=COSθ, of which, θ means their phase difference; if the voltage phase is leading current, θ>0, the load will be inductive or otherwise the capacitive. Second, the harmonic contents in the current wave. The bigger the harmonic content, the lower the power factor. For rectification load (such as the switch power with many reactive factor corrections), the phase difference between voltage and current is not big but the current harmonics. In addition, the current harmonics will cause pollution to the grid. Power factor correction means to improve the current wave to allow its shape identical to the voltage wave as much as possible; in such case the load will be typical of resistor property, with power factor approaching 1. After rectification, add DC/DC power factor corrector (PFC), and then by utilizing the operation of active switch, to rectify the input current into the sine wave similar to voltage wave, thus improving power factor. Boost circuit has many advantages in improving power factor, with working principles as follows: when Q1 is on, diode D1 is closed, inductance L1 is being charged, under the influence of input voltage Vin, the current of 21 L1 is on linear increase, the input electricity energy is converted into magnetic energy and then stored in the inductance coil, while load is powered by the filter capacitor C1. When Q1 is closed, as the inductive current will not be subject to the sudden change, L1 generates the right-positive left-negative inductive potential in an attempt to prevent the attenuation of inductive current. In such case, D1 is on, the inductor L1 transfers the magnetic energy stored in the previous period via D1 to both charge C1 and provide for the load. Therefore, it is able to control the voltage at both ends of the load by adjusting the on and off time of switch S. In addition, since the inductive current is not subject to sudden change, it can easily regulate the wave of inductive current (input current) to be identical to the voltage wave form. 3.4 Description of the signal end of power board 3.4.1 Sampling signal, connecting to main control board CN6. 22 3.4.2 Charging board interface of standard type Signal at the module port of charging board of standard type • 23 when under battery mode. Operation of charger: • In case of main power input. CHGOFF-signal is low level. the voltage is connected through PIN7 to PIN3 where the potential is up to 1V. • Control methods are as follows: when CHGOFF. shut down PWM. In addition.signal can also work under PWM (2KHZ) mode. • The operation of charger is subject to the control by UC845. thus regulating the charging current. output capacitor is charged and current flows through the load. a Fairchild isolated auxiliary winding will provide the working power for UC3845.signal is high level. the rectification circuit composed of D5～D8 and C10 will convert AC input into DC. control the voltage drop of TL431 AK to allow the optocoupler work under different currents by comparing the terminal R of charging voltage’s feedback signal TL 431 with the reference 2. With the application of bleeder circuit. • Apart from the high and lower level. charger stops working. and has no energy transfer to the load. U2 is off. the charging current can be regulated according to the input voltage. It is able to change the DC current superimposed on 3845 PIN3 by controlling DUTY of PWM. 3.5V. charger starts working. • B. • 2) Features of charging module • A. thus maintaining the table voltage output.3 Fan module port 24 . • When under battery mode. internal temperature and the batteries connected.4. the diode will be subject to reverse-phase and bias voltage. since the secondary and primary winding of transformer are opposite in polarity. CHGOFF. When the charger starts working. the secondary winding has the reverse polarity. and diode is on. the current will flow through and stored in the primary winding of transformer. DUTY can be controlled by controlling voltage of 3843PIN1. charger stops working. CHGR ON/OFF control • When main power is in (normal) condition. and provide power to UC3845 via bleeder circuit. CHGR ON. CHGR OFF. when Q1 is closed. charger starts working and charges the battery. U2 is on.• Fundamental circuit and wave form of Fairchild isolated inverter Working principle: When Q1 is on. According to IC=BID. 3× （1-0.34 • LOAD<25% FANSPD DUTY=0 • ②Provide FANCLK SIGNAL for CPU to detect fan speed. average voltage on both ends of fan: 12V. • LOAD>50% FANSPD DUTY=0. the faster the fan speed. the bigger DUTY. i. average voltage on both ends of fan: 12V-3.3V=8.67，average voltage on both ends of fan: 12V-3.Fan module port signal Control of FAN • Functions of fan control module: • ①Achieve four-speed control for the fan according to the load magnitude: • LOAD>70% FANSPD DUTY=1 • LOAD>50% FANSPD DUTY=0. 25 . the fan speed is subject to the FANSPD DUTY. • LOAD>70% FANSPD DUTY=1. • LOAD>25% FANSPD DUTY=0. average voltage on both ends of fan: 12V-3. • 1).822V.67 • LOAD>25% FANSPD DUTY=0.3× （1-0.7V.e.34）=12V-2.67）=12V-1. • Then.089V=10. Regulation of fan speed • Analyze the relation between FANSPD signal and fan speed: • LOAD<25% FANSPD DUTY=0.911V.178V=9.34. 4.3. INV driver module port 26 .5 PFC. 4. INV) 3.IGBT driver module (including PFC.6 SPS power module port signal 27 . while SW1 is connected to the VCC port of the working power control chip UC3845. As stated in the description of charger.Power SPS port signal • • • For the working power. Working power continues operating even the startup key is not impressed. CPU starts working. with operation similar to that of DC startup. with similar working principle to the charger. and the operation of the working power is completed by PRSY module. In case of normal input of main power. and then UC3845 is powered for operation. SW2 is connected to battery through the bleeder resistor and conveyed to control board. With stable working power. the charger on the power boardstarts working. will generate types of working power and provide stable power for UC3845 by replacing SW1 with +12V. When the startup key is pressed down. Its input originates from battery and output from charger. 2. 1. the Fairchild isolated inverter with single-unit output port (+12V) is employed. and will execute a series of operations when detecting out that DC is started. after being operated. Fairchild inverter. SW1 is connected to SW2. UC3845 will be powered for operation when SW1 is connected through bleeder resistor to the output phase of charging voltage. 28 . DC startup. then charge the long time-delay external battery. 3.1 Main power passes through the input end of long time-delay charging board and the input filter.2 Main board control signal is conveyed to charging board.3. The blockage protection will be activated in case of excessive high charging voltage at the time of startup.5. providing SPS power for power board consistent to the charging power.5.5. 3.5 Long backup type charging board Main power input Battery output Locking signal 3. It is equipped with main power high-voltage protection. charging output high-voltage protection.3 Charging mode: 29 . discharge 5min. proceed with 1 min low-voltage charging (or open).1 Three-stage charging mode: The first stage: recharge the batter with 90% capacity Constant power and marginal current: Charger’s power is ≧3 hrs.26~13.3. Note 1: the charging range of charger will vary according to the battery in series connection. The second stage: recharge the remaining 10% (from 90% to 100%).4V/6 cells) Low-voltage range (13.9V timing voltage value When series connection ≦10 Pcs.3~14. maintain the battery capacity with 60 cycles (72 hrs per cycle) of high and low voltage. Voltage temperature compensation: provide temperature compensation with -3mV/℃ regulation voltage for above voltage (based on 25℃). number of batteries in series connection). thus preventing damage to DC/DC Converter in case of high-voltage up to 14. with 90% of capacity. as shown below (Ta: 25℃): Series connection ≦10 Pcs Series connection ＞10 Pcs(Regulated By VR) High-voltage range (14. equalize capacity of batteries in series connection.9 V 13.9V/6 cells (F/W detection value error: n*(13. recharge battery until full-load. and 360 cycles later.05~14.8V/6 cells) (13.7V. controled under ±2%.4V/6 cells) F/W high-voltage 13. voltage range is quite large. When battery voltage reaches 13.7V/6 cells) (14. the existing charging voltage requires no VR regulation.95V). F/W: provide correction function to adjust the actual high-voltage timing voltage within the 30 . proceed with the second stage.3~13. start the third stage. While UPS F/W requires turning off charger to start DC/DC Converter logic control. The first cycle: after 1min high-voltage (Note 1) charging. n. The third stage: maintain battery capacity After 70hrs low voltage.85V~13. with error range of 13.2. recharge with high and low voltage 36 cycles for every 1% of discharging capacity.2 Batter discharges over 10% of its full-load capacity.66% of the total amount.3 After high and low voltage recharging. restart the third-stage charging. recharge with full-load.2.000 (1/10 of the total capacity).4 abnormality detection: 3.2 Battery discharges in case of power failure during UPS third-stage charging. turn off the charger. less than 1% should be calculated as 1%. 3.4.2. 1.3.1.3.3 In case of discharging capacity bigger than 10%. recharge high and low voltage 260+36 Cycles. discharge 6 sec. recharge with high and low voltage 36 cycles for every 1% of discharging capacity.3 Recharging method for battery discharging capacity less than 10% 3. restart the third-stage charging. Battery with 50% of load will discharge 10 sec with discharging capacity of 500. When main power supply is recovered.2 After repetitive high and low voltage charging no less than 72 cycles. 3. 3.1V/pcs. 3.2 Within 70~72hrs after the third-stage charging. 3.3.2. 1% of the total amount. less than 1% should be calculated as 1%. with 50% of load.1 When exceeding 180 times of discharge time.3. with standard capacity 3.1 Battery discharges when UPS is powered off during the second charging stage.2. and remaining 90% of capacity.3. 3. recharge with high and low voltage 36 cycles for every 1% of discharging capacity (based on the remainder of 60Cycles).3. 100 cycles (260 cycles left) have been recharged. then discharge 5min. 3. and battery voltage is lower than 13. 3.1 After repetitive high and low voltage charging less than 72 cycles. with standard capacity 3. 3.2 UPS will start the three-stage charging under any of following condition: 3. When main power supply is recovered. The function is unnecessary under any of following circumstance: (a) Charger capacity is less for 3hrs service. When battery discharges.1V/pcs 31 . less than 1% should be calculated as 1%. calculated as 2%. 3.000 (1/10 of the total capacity).3. battery voltage is lower than 13.1 Within 70hrs after the third-stage charging.1 Start machine. discharges 300. 3. 3. recount from 0 to 70hrs.error range.1. recharge high and low voltage (36+36*2=108 Cycles).4. For example: discharge time for the full-load UPS battery is 5 min. (b) Power failure occurs when the third-stage charging have not yet completed.1.05~13. © UPS fails to employ the Battery Remain Time Module.3. For example: discharge time for the full-load UPS battery is 5 min.15V. 24 cycles of high and low voltage (36 cycles left) have been recharged during 70~72hrs of the third-stage.2 During the second and third stage. UPS displays the warning for battery in abnormal condition. 3. protection point 14.2 For Battery Test.5 Battery Test 3.05~13.5. or bigger than 14. 32 . turn the charger ON after every 10 Sec discharging.9V (error range: 14.5.95V) when less than Pcs batteries are connected in series.5. judge the battery NG. 3.55~14.2 For manual battery test or periodic battery test during the second and third stage.65V) when more than 10 Pcs batteries are connected in series.6V (error range: 14. then add cycles (with 1% of discharging capacity corresponding to 36 Cycles) to the original remaining high and low voltage cycles so as to recharge the high and low voltage.1 Do not operate Battery Test manually during the first-stage discharging. periodic battery test can be carried out during the second-stage. 3. calculate the actual discharging capacity according to Battery Test discharge time and the load.(error range: 13. It can be carried out as per the demand of customer.85~14. stop discharging when voltage is lower than 10.5V. it is able take subsequent operations.15V). humidity: Around 50%. 9 UPS should be installed on a floor capable of withstanding the weight of UPS system. EA900II series UPS installation. Recommended working temperature: 20~25℃. vertical gradient not exceeding 5 degrees. switch and precautions 4. UPS system should be installed in a clean. 9 UPS should be installed close to AC power output as much as possible. Elevation m Derating coefficient 1500 2000 2500 3000 3500 4000 4500 5000 100% 95% 91% 86% 82% 78% 74% 70% 4. meeting the requirement of GB3859.2 Location layout 9 AC capacitance in the machine room should meet the normal operation of equipment. It is not allowed to share the same air switch with other equipment.1 Selection of environment Working temperature: 0-40℃ Storage temperature: -40-70℃ (no battery) -20-55℃ (with battery) Relative humidity: 5%～95%. 33 . It is forbidden to perform dangerous operation. cool and dustless environment with excellent ventilation and adequate humidity. it is recommended to use as per derating stated in the following table when the elevation is higher than 1.4. no condensation Altitude: 1500m.500 m.2-93 for derating Verticality: no vibration and jolt. 9 The machine room should be equipped with fire-fighting apparatus and free of any inflammable and explosive articles. do not start up and notify the forwarding agent and distributor. input and output voltage and frequency.3. 4. ●Inspect UPS for damage in transit.2 Confirmation items for UPS specification UPS capacity. Accessories should include a manual. ●Confirm machine model by checking the model on the front panel and rear board of machine.3 Unpack inspection 4. do not block or impede UPS heat dissipation passage. at least 1m around. Model Type Model Type EA901SC II 1KVA standard type EA901HC II 1KVA long backup type EA902SC II 2KVA standard type EA902HC II 2KVA long backup type EA903SC II 3KVA standard type EA903HC II 3KVA long backup type 4. battery voltage.9 Keep ideal ventilation around UPS. 9 The space reversed around UPS. In case of any damage or deficiency. should be accessible for maintenance and operation by technicians. 9 UPS machine room should be equipped with professionals for management.3. 34 .1 Unpack inspection ●Unpack UPS package and inspect the supplied accessories. communication line and disk. A battery connecting line shall be equipped for the long backup type. and unauthorized personnel are not allowed to enter UPS machine room. input and output phase number. ●After connecting the charging line plug to UPS battery socket. connecting wrong number of batteries will result in abnormality. UPS starts charging the battery group. ●Do not connect UPS to any load prior to completing power line connection and providing main power. Please strictly follow the following battery connection procedures since failure to comply with the procedure may cause electric shocking: ◇Connect battery group in serial to ensure proper battery voltage. four batteries for EA902II and six batteries 72VDC for EA903II.4 Battery connection Operating procedure for long backup type external battery: ●Use the correct battery group voltage according to the different UPS model: two batteries 24VDC for EA901II. one end is a socket connecting to UPS. 智能插槽 红 + + - - E RE S T O T RE SET +- 电池输入 (长效机) 黑 Connection diagram for EA901II long backup type external battery + - + - + - 红 + RE SET O T E RE S T +- 电池输入 (长效机) 黑 35 - . Remember: red line should connect to the anode and black one to the cathode. ◇Batter connecting line should be first connected to the battery end (connecting to UPS end first may cause electric shocking). with red line connecting to anode “+” and black one to the cathode “-”.4. ●For 1-3KVA battery connecting line. the other is the open-type line connecting to battery group. start up loads in sequence. and built-in components are not ensured to be electrically neutral when UPS is shut down.Connection diagram for EA902II long backup type external battery + - + + - + + - + - 红 RESET O T RESET +- 电池输入 (长效机) - 黑 - Connection diagram for EA903II long backup type external battery 4. The intake at the bottom end of front panel and the side of the box as well as the fan vent hole at the back shroud should be kept clear. flammable gas and corrosives. ●Since water condensation may occur when dismounting machine under low temperature. ●Place UPS near the main power input socket so as to unplug it to power off in case of emergency. after connection. Notice: ●It is required to shut down load prior to connecting the load to UPS. ●All power sockets should be connected to the protective earth wire. ●The ambient temperature for UPS should be kept between 0℃~40℃. If need stopping UPS output. away from water. press down the shutdown button and stop the main power 36 . or otherwise there will be electric shocking. ●Do not put it on its side. ●UPS output end may be electrified no matter the input power cable is connected to the main power socket.5 Precautions for installation ●UPS should be stored in a place with ideal ventilation. ●Connect UPS to the special socket with over-current protection device. do not install and operate until the machine is completed dried. UPS will automatically charge battery once input main power is connected to the main machine. and then UPS operates under the battery mode. After startup. It is serviceable if not being charged. or set it as OFF for no bypass output. which should be twice of the rated one. After self-checking. an 8-hour battery charging is recommended prior to use. but its backup time will be less than the standard time. start UPS by a long press (more than half a second) on the startup combination key. LED lamps are illuminated and out in sequence. and start UPS. If needing output.6.3 Manual self-checking and mute operation ① When UPS is under main power working mode.6 Operation instruction for startup and shutdown 4. LED lamps will be illuminated and out in sequence. ② Start up the inverter by continuously pressing on the combination key more than half a second. Shut down UPS DC without main power ①Shut down machine by continuously pressing on the shutdown combination key more than half a second. set bPS under the setting interface as ON. 4. the system will enter the main power mode with corresponding LED lamp illuminated.6. ②During startup. ①When main power is on. LCD will display 0 output voltage. UPS operates the same with the main power connection process. ① Shut down the inverter by continuously pressing on the shutdown combination key more than half a second. display and laser printer. LED lamps will be illuminated and then out in sequence until no display on panel. ② After shutdown. no output. After self-checking. LED lamps will be out. UPS will perform self-checking first.6. If needing bypass output voltage. ●For standard type. After self-checking.1 Startup Connect to main power. press down the system self-checking/mute operation combination key 1s. user can set bpS under the setting interface as OK. UPS will first perform self-checking.2 Shutdown Shut down UPS when main power is provided.supply. 4. ●The initial power of UPS should be calculated when connecting to inductive loads with large initial power like the electric motor. UPS enters the self-checking mode and tests relevant status. 37 . and then UPS operates under the main power mode. corresponding LED lamps are illuminated. ②During shutdown. 4. Start UPS DC without main power input ① In case of no main power input. it will automatically exit and LED recovers. indicating no output voltage. ②When UPS is under battery mode. Description of UPS panel function and mode setting Panel function and operation 5.1 Key function ™ Startup combination key ( + ) Execute the startup operation by pressing down the startup combination key more than half a second. press down the system self-checking/ mute operation combination key 1s. ™ Shutdown combination key ( + ) Execute the UPS startup operation by pressing down the shutdown combination key more than half a second. 5. ™ System self-checking/silence combination key ( + ) With a long press more than 1s under the main power or economy mode: UPS self-checking operation With a long press more than 1s under battery mode: UPS mute operation 38 . buzzer becomes mute. after another same operation. buzzer starts buzzing. ™ Inverter LED green light is constantly illuminated: UPS is under main 39 . Long press on more than 2s: under polling mode. back to the home page. after another long press on . Under the function setting mode: Short press on or more than half a second but less than 2s: select the setting options. Under the function setting mode: Short press more than half a second but less than 2s: confirm the setting option. ™ Function setting key Under non-functional setting mode: A long press more than 2s: enter the function setting interface.2 Functions of LED indicator light The inverter light. the displayed items will be automatically switched every 2s. 5. battery light. Long press more than 2s: exit the function setting interface. and bypass light and alarm light lies respectively from left to right.™ Query key（ ） ， Under non-functional setting mode: Press or more than half a second but less than 2s: display options in the LCD item area successively from left to right. press down mute key. When UPS is overloaded. the fan will rotate. ™ Alarm LED red light is constantly illuminated: UPS is under failure state. and the battery icon will flash when battery capacity is too low or the battery is not connected.3 LCD display LCD panel display Graphic display area: 1) The load and battery represents the load and battery capacity.power. buzzer icon will flash. the icon will not be displayed. while under other conditions. Note: Refer to the List of LED Light/Display Panel and Alarm for LED indicator light under different mode. ™ Bypass LED yellow light is constantly illuminated: UPS works under bypass mode. the icon will not be displayed. while under other conditions. but the fan icon will flash in case of fan failure or disconnection. 25% for each square. 4) Under failure mode. ECO or battery supply mode. 40 . Normally. the failure icon will be illuminated. 3) Under battery mode. 5. ™ Battery LED yellow light is constantly illuminated: UPS works under battery mode. 2) Fan icon represents its working status. the load icon will flash. Power grade and working mode display area: 1) Within 20s after startup. ON or OFF flashes at the right of character “ECO”. bypass (bypass mode).4 Panel setting operation UPS. the setting will be activated once conditions are met. ②Enter the ECO setting interface with a short press more than half a second but less than 2s on the setting key . eco (economy mode) and shutdn (shutdown mode). batt (battery self-checking mode). under the failure mode. display the output information under normal mode. 5. the character “ECO” will be constantly illuminated. With setting operation as below: 5. load and temperature by operating the left/right query key. With a short press more than half a second but less than 2s on the query key 41 . it is able to display information relating to the input.1 ECO output setting ECO ON setting interface ECO OFF setting interface ① Enter the setting interface with a long press more than 2s on the setting key . bat (battery mode). the display area will mainly display the working mode. battery. allows for setting under any mode.Numerical display and function setting area: 1) Under non-functional setting mode. line (main power mode). The setting parameter information can only be saved when the machine is connected to battery and shut down under normal condition. 2) 20s after startup. 2) Under setting mode. After setting. which is equipped with setting function. it is able to set output voltage value and activate the bypass and eco mode by operating the function setting key and the left/right query key. such as the stdby (standby mode). the display area will mainly display the power grade of the machine. it mainly displays the fault code. and then the character “ECO” will flash. while it is recommended to complete setting under the standby mode. with a short press more than half a second but less than 2s on or . back to the main interface and display the UPS output information. the character “bPS” will be constantly illuminated. exit the setting interface. 5. the character “ON” (or OFF) at the right of ECO will constantly illuminate instead of flash. in such case. ③After selecting ON or OFF for confirmation and a short press more than half a second but less than 2s on the function setting key . ④After a long press more than 2s on the setting key . the character “ON” (or OFF) flashes at the right of character “BPS”. ECO setting function confirmation is completed. With a short press more than half a second but less than 2s on the 42 .or .5 Bypass output setting BPS ON setting interface BPS OFF setting interface ①Enter the setting interface with a long press more than 2s on the function setting key the query key . ON means to activate the function while OFF means to disable it. ②Enter the bPS setting interface with a short press more than half a second but less than 2s on the setting key . then the character “bPS” will flash. user can select the function setting and bypass output setting interface. user can select activating ECO function or not. the character “ON” (or OFF) at the right of bPS will constantly illuminate instead of flash. bPS is under OFF status by default. the machine will have bypass output but backup for power failure when connecting to main power with machine shut down or not started up. in such case. user can select activating bPS function or not. bPS setting function confirmation is completed. back to the main interface and display the UPS output information. ⑤After setting bPS as ON. exit the setting interface. user can select the function setting. the character “OPU” will flash. ③After selecting ON or OFF for confirmation and a short press more than half a second but less than 2s on the function setting key . ②Enter the output voltage OPU setting interface with a short press more than 43 . after selecting the output voltage setting interface. ON means to activate the function while OFF means to disable it.query key or . ④After a long press more than 2s on the setting key . With a short press more than half a second but less than 2s on or . 5.6 Output voltage setting Output voltage setting interface ①Enter the setting interface with a long press more than 2s on the function setting key the query key . or return to 44 . After a long press more than 2s on the right query key . in such case. display the output information under the default status. OPU setting function confirmation is completed. ④After a long press more than 2s on the setting key . with a short press more than half a second but less than 2s on the query key or . LCD will display under the polling mode. exit the setting interface. numerical values at the right of OPU will constantly illuminate instead of flash. the character “OPU” will be constantly illuminated. output. The output voltage is 220v by default. battery. back to the main interface and display the UPS output information. after 30s. user can select the numerical value corresponding to OPU function. ③After confirming the numerical value and a short press more than half a second but less than 2s on the function setting key . voltage values like 208v，210v，220v，230v，240v are optional. load and temperature with a short press more than half a second but less than 2s on the query key or . 5.half a second but less than 2s on the setting key .7 Parameter query Check the information relating to input. automatically switch the displayed items every 2s. the numerical value flashes at the right of character “OPU”. as shown in the following figure: Note: under no-load condition. as shown below: Input: display the input voltage and frequency.the main interface with another long press within 30s. as shown in the following figure: Load: display the value of WATT and VA of the load to be connected. it is quite normal for LCD to display the smaller load value. as shown below: 45 . Temperature: display the maximum temperature point of the internal components. depending on the load type and size. Output: display UPS output voltage and output frequency. the display area will display the character “Bypass”. Enter the bypass mode under two circumstances: ①UPS. 46 .1 Bypass mode Under bypass mode. as shown below: 6. buzzer will sound every 2min accompanied by the illuminated alarm LED red light. Description of UPS working mode 6. When bypass LED yellow light is illuminated.Battery: display the battery voltage and capacity. in addition. under LCD mode. fails to start up but activates the bypass output. which is powered by main power. LED indicators are shown as below (white means the illuminate status). LCD display screen can be determined according to the load and battery capacity. Note: No backup function for bypass mode. in addition. and the character bat is displayed in the display area under LCD mode. and the character batt is displayed in the display area under LCD mode. 6. buzzer alarms every 4s. LED red alarm light is illuminated. the 47 . battery light and fault light will flash in cycles. LED indicators are shown as below: inverter LED green light is illuminate. UPS will immediately switch to battery mode in case of main power failure or instability.4 ECO mode LED indicators are shown as blow under the ECO mode: inverter LED green light and battery LED yellow light is constantly illuminated. and the display area under LCD mode will display the character “Line”.3 Battery mode LED indicators are shown as blow under the battery mode: constantly illuminated inverter LED green light and battery LED yellow light. bypass light. During battery self-checking.2 Main power mode Under main power mode. 6. the inverter light. 6.② Overload or over-temperature under main power mode. UPS will work under main power mode when the input main power meets the UPS working condition. In case of UPS fault. or press the shutdown combination key if no severe faults are confirmed. 48 . in addition. In such case. 6. inversion fault and over-temperature fault. it is allowed to press down the mute key to pause buzzing for maintenance.5 Fault mode LED indicators are shown as blow under the fault mode: alarm LED red light is constantly illuminated. stop output and display the fault code with LCD. UPS will work under the ECO mode. the fault icon and code will be displayed in the display area under LCD mode. When input main power. When the input main power complies with the ECO input range and ECO function is started. repeatedly exceeds ECO range but within the inverter input range. For instance. the overload fault. within 1min.character “ECO” will be displayed in the display area under LCD mode. refer to the Reference Appendix: Table of fault code information and Table of Troubleshooting. the machine will automatically operate under the main power inversion mode. alarm light will be constantly illuminated and buzzer sounds. UPS will enter the fault mode. Note: For fault codes. List of LED and LCD display alarms Appendix I: Corresponding table of fault code Fault cause Fault display code Bus voltage fault 00－14 Soft start-up fault 15-24 Inversion voltage fault 25－39 Internal over-temperature 40－44 Output short-circuit 45－49 Overload 50－54 Input NTC fault 55－59 Power fault 60－64 Input fuse fault 65－69 Others 88 Appendix I: Corresponding working status for displays Panel light signal display No.7. 1 Working status Normal Battery Bypass Fault Main power inversion mode Normal main power voltage Main voltage power ● No high/low protection. ● ● ★ ● ● ★ switch to battery 2 Alarm sound One buzzing every four seconds Battery working mode Normal battery voltage 49 One buzzing every Remark . warning Overload under power mode. protective Long buzzing operation 6 7 8 Bypass overload warning Fan fault (fan icon flashes) ▲ ▲ ● ★ ▲ ★ Fault mode ● One buzzing every two seconds One buzzing every two seconds Long buzzing ● _Indicator light is constantly illuminated ★ _Indicator light flashes ▲ _Indicator light status depends on other conditions Note: Please provide following materials when contacting maintenance personnel: 50 .four seconds Warning for abnormal battery voltage 3 ● ★ ★ main power ● voltage (under bypass) High main power voltage ★ ★ warning (under bypass) Low main power voltage ★ warning (under bypass) One buzzing every two minute One buzzing every four seconds One buzzing every four seconds Warning for battery disconnection Under bypass status ● Under inversion status ● ★ ★ Power on or start up 5 one second Bypass working mode Normal 4 One buzzing every One buzzing every four seconds One buzzing every four seconds Six buzzing Input overload protection Overload under main power mode. ● ★ Two buzzing every one second main protective ● ● Long buzzing operation Overload under battery mode. warning ● ● ★ ● ● ● Two buzzing every one second Overload under battery mode. power. ◇Complete description (including panel indicator light display. check the soft start-up resistor for damage. load capacity. constantly Solutions sounds.). sound. with fault code 00-14 Fault indicator constantly buzzer light is Find the soft start-up part and illuminated. machine serial No. (SERIAL NO. Soft start-up fault constantly sounds. or contact with 51 . BUS voltage fault Check if bus voltage is normal or contact with your supplier.). Occurrence date. for long backup type. battery equipment information should also be provided). 8 Troubleshooting LCD indications under fault mode are shown as below: Fault display Fault code Troubleshooting for abnormal conditions Faults Fault Causes indicator constantly buzzer light is illuminated.UPS model ((MODEL NO. recalculate load Over load efficiency and reduce the quantity of load connecting to with fault code 50－54 UPS. with fault code 25-39. circuit loads. remove non-critical equipments. no sounds. if failed. constantly sounds. contact with your supplier.with fault code 15-24. Inverter constantly voltage sounds. 52 inspect loading . Output constantly short sounds. remove all is illuminated. constantly Ensure no UPS overload. restart it. if failed. Ensure load is free of fault or internal short circuit. contact with fault code 45－49 with your supplier. Wait over-temperature 10min to allow UPS cool down. Fault indicator constantly buzzer light is illuminated. Fault indicator constantly buzzer light Power off UPS. light is illuminated. with fault code 40-44 vent blockage and excessive Internal high indoor temperature. fault Contact with your supplier. Restart it. Check the load capacity and Fault indicator constantly buzzer light is illuminated. Fault indicator constantly buzzer your supplier. UPS input end is Connect the UPS input end. light is Inspect the input fuse for illuminated. the power input and output. Restart machine after constantly sounds. contact your supplier. check illuminated. if constantly sounds. supplier. rotation and damage. if 53 . illuminated. is key more than 2s in continuous. if failed. Input NTC fault Contact your supplier. is Inspect the fan for connection. Fault indicator constantly buzzer light is illuminated. please contact your supplier. with fault code 55-59 Fault indicator constantly buzzer light is Find out the power part. damage.equipment for fault. Input fuse fault with fault code 65-69 Fault indicator constantly any abnormal condition were light replacing fuse. constantly sounds. Power fault with fault code 60-64 Fault indicator constantly buzzer found. and the fan icon on found. condition were key Start up UPS by pressing the time too short. Startup UPS is not operated when the pressing startup key is pressed down. if any buzzer sounds every two Fan fault abnormal seconds. please contact your LCD flashes. . Reset breaker manually. Aging battery with reduced capacity Main power is normal but UPS is not powered by main power. UPS should be connected to Battery the main undercharged consecutive power in hours. three and recharge the battery. UPS input breaker disconnected. Internal fault condition. Short battery discharge time Check the load capacity and UPS overload remove non-critical equipments. 54 Replace battery. of UPS Contact with your supplier. power off first and battery is then start up under no-load disconnected. Detailed solutions based on the fault code.poorly or the connected the standard typebattery has standard low voltage. and contact your supplier for the battery and its components. Main power input fuse SPS power board Positive BUS test point Output inductor mutual DC-MOS Output relay Battery voltage sampling Output filtering inductance Main power input fuse 电池保险丝 Battery fuse Input voltage sampling BUS RCD absorption part PFC boost inductor Zero and live line input detection DC-MOS Negative BUS test point INV-IGBT PFC-IGBT 1. Working power generates circuit (See the following figure) 55 . 70V 0. DC converter (See the following figure) Appended drawing: fundamental diagram of structure 56 Fault value 0 or too low 0 Infinite Infinite 0 or Infinite 0 or Infinite Infinite .1 Ω 2.A.37V —— 47 Ω 0. Common fault handling Fault No power Fault component U1（6-5） Multimeter gear Resistor gear Q1 Diode gear TX1 R8 ZD601 ZD602 R10 Resistor gear Resistor gear Diode gear Diode gear Resistor gear Standard value 47 KΩ SD interelectrode Around 0.70V 0. 39V 0. Judgment standard for maintenance: DC-DC converter is OK when the measured DC BUS voltage is controlled within the margin of error of normal value. Q6 and Q7 Working frequency 22Ω 0. R89 Q13、Q11、Q6、Q7 之 SD SD of Q13.428V Fault value 0. Q6 and Q7 Q13、Q11、Q6、Q7 之 GS GS of Q13. add DC/DC power factor corrector (PFC). Power factor correction circuit (See the following figure) Power factor correction means to improve the current wave to allow its shape identical to the voltage wave as much as possible. too high 0. Q11. too high Infinite Infinite 0. too low. too low. too high 2.428V 0. A、 常见故障处理 B. and then by utilizing the operation of active switch. too low.39V 0. thus improving power factor. voltage and wave frequency of key points in the boost circuit: Resistance value (or measured Voltage value value at diode (RMS) gear) Key Pints R105，R112，R93. with working principles as follows: 57 .A. in such case the load will be typical of resistor property. Resistance. Boost circuit has many advantages in improving power factor. too high 0. 3) Above measured resistance values are the static overall measured value. too high 0. 2) Measuring tool: FLUKE-87 and TDS340A. to rectify the input current into the sine wave similar to voltage wave.39V 10 Ω 10 Ω 0.345V —— —— REF 44KHZ 23KΩ —— 44KHZ Note: 1) Resistance value is the value relative to the common “ground”. After rectification. D38、D37 D14、D15 Multimeter gear Diode gear Diode gear Diode gear Diode gear Resistor gear Diode gear Diode gear Diode gear Standard value 0. with power factor approaching 1. too high 0. too low.39V 0. Common fault handling Fault phenomenon Fault components S-D of Q13 1、4 灯亮，BUS S-D of Q11 S-D of Q6 FAULT S-D of Q7 The first and R105、R112 fourth light is R93、R89 illuminated. too low. too low. Q11. 535V —— 0 Fault value 0. Service skills: To judge the inoperation of PFC circuit. VCC+(—) power of the power circuit instead of using control board. too low. Common fault handling: Fault phenomenon PFC is not operated or DC BUS voltage is abnormal.39V 0. If it is possibly caused by the lack of PFC power.D.39V —— 36Ω 47Ω 0. exceeding 385V (range) Fault Multimeter components gear S-D of Q12 Diode gear S-D of Q10 Diode gear PCB7 —— R111 Resistor gear R109 Resistor gear D20 Diode gear REC1 Diode gear F1 Resistor gear Standard value 0. D. 4. Inverter (See the following figure) 58 . too high 0. too low. Judgment standard for maintenance: PFC is deemed OK when the DC BUS voltage value measured under LINE MODE falls within the normal value 385VDC range. user can directly measure the PF. too high PFC boost module Infinite Infinite 0 or infinite 0 or too low Infinite C. D2、D4 PCB8） Multimete r gear Diode gear Diode gear Resistor gear Diode gear PCB6 7.A. infinite 0. UPS is constantly buzzing. infinite Inversion driver module Inversion driver module . Output circuit (See the following figure) 59 Standard value 0. Common fault phenomena Fault Fault phenomenon components Q4、Q5 R63、R68 R77、R79 Failed inversion.374V 36Ω 36Ω 0．537V Fault value 0 0. infinite 0. is sent to CNTL board to display the load capacity and other protections on the panel. and L. Fault indicator light is constantly illuminated. UPS sends INRLY signal. Working principle: When detecting out INV under normal working condition.C+L. Test BUS voltage with 60 . B.C.A. buzzer constantly sounds. INV and BYPASS voltage is provided via P1 and P2 to the load. CT2. or otherwise remain the BYPASS output. with fault code 00－14 BUS voltage fault is confirmed according to the code.81 INV or under load and load CT2 indicator light is under abnormal RLY1 condition Multimeter gear Standard value Resistor gear 10Ω/68Ω Fault value Too high infinite or Resistor gear Resistor gear 1. switch from RLY1 to INV output. Common fault and handling Fault Fault phenomena component Fails to switch to R80. R80 and R81 is used for load detection. Precautions for test 1) Watch out for the polarity when measuring signal (battery. 2. 2) Start up machine. 4) If any abnormal condition were found during static measurement of power components. it should work under no-load condition. 5) Potentially problematic components: PFC-IGBT and its driver circuit. 4) After confirming the machine is under normal condition. Method of current limit startup: (DC POWER SUPPLY OR CHARGER) 1) Pull out the battery line. connect to the main power and complete the corresponding measurements. inspect DC BUS voltage for discharging prior to the next test. 3) After each test. observe and check signal. In such case. 2) As working current is quite small during current limit startup. Current limit startup Current limit startup is required after maintenance or replacement of board. BOOST-DIODE. no power tube will be damaged even in case of component short-circuit. Purpose of current limit startup: 1) Judge if UPS is under normal condition and prevent breakdown from expanding. positive and negative BUS voltage (±350VDC) and output voltage. carry out the DC source (current limit point should be adjusted around 3A) or charging board analog battery input. etc. 3) After it is normally started. 61 .multimeter to confirm if it is around the rated voltage range (positive and negative 350V). and current limit startup should not be carried out unless everything is confirmed OK. DC POWER SUPPLY). DC/DC MOSFET and its driver circuit. 3) Current limit startup is necessary for finding the fault and relevant fault information. it is necessary to inspect parts for damage prior to startup. 2) Wear antistatic wrist strap to prevent damaging IC. To prevent serious fault. Note: Precautions for maintenance 1. CHARGER and FUSE. Please check BUS first in case of wrong voltage. working power. it is forbidden to start up at will. and connect to the battery. remove the DC source or charging board connection line. INV-IGBT and its driver circuit. and allows for the UPS network communication by combining the special Ethernet card (optional accessories). Precautions for battery handling ◇Before handling. please contact your distributor or the customer service center.9. For details. 62 . Network communication EA901II~9010II (1KVA~10KVA) provides intelligent network card interface. never handle with battery or battery group with fire. take off metal articles like the ring and watch and the like. please purchase the raw material from our company service station or the distributor so as to prevent fire arising from heating or sparking due to undercapacity. ◇Do not damage or open the battery as the leaked electrolyte is highly toxic and hazardous to humans. ◇Inspect battery for voltage prior to touch. There will be high voltage between the battery terminals and the ground if the battery loop and input voltage loop is not isolated. ◇To prevent explosion and injury. ◇It is necessary to prevent positive and negative polarities of the battery from being shorted or otherwise there will a fire or electric shocking. ◇When need to replace battery wires. 10. Note: The attached special connection line provided by our company should be employed for the communication interface. Data form of Rs232 is set as: ◇Bit rate: 2400bps ◇Character length: 8bit ◇End code: 1bit ◇Parity bit: None 63 . Description of communication interface UPS provides two types of signal aspects for communication with the host computer: the analogue relay tip. and the serial interface RS232. which provides serial communication interface to monitor the input power and UPS material as well as control UPS status. which utilizes the “ON” and “OFF” status of transistor to convey the input power and UPS status to the host computer.11.