9. Maintenance. 9.1 Precautions before Maintenance. Service Manual. electrolytic capacitor after power off. maintenance safely.

Transcription

1 9. Maintenance 9.1 Precautions before Maintenance electrolytic capacitor after power off. A B A B maintenance safely. 50

2 9.2 Error Code List Unit o. ame Display 8 nixie 0.5s) Operation Indicator Cool Indicator Heat Indicator D40/ D41/ D5 D6 D42/ D43/ D16 D30 1 protection E2 twice cooling compressor Rotation speed of indoor fan is 2. Replace indoor replace indoor fan indoor fan operates. 3. Clean all cooling 2 protection of compressor E4 4 times See 9.3 compressor (diagsis of indoor fan operates. protection) all Refer to maintenance 51

3 3 protection E5 5 times compressor and fan operates. all 3. Replace main board AP1 4 E6 6 times compressor and See 9.3 Refer to (diagsis of maintenance fan operates. all 5 protection E8 8 times See compressor and 9.3(diagsis Refer to maintenance fan operates. protection) all 52

4 Connection terminal between indoor ambient 6 Indoor ambient sensor is once sensor and main stop operation board is loose or poor connection. cooling Refer to compressor maintenance Indoor ambient sensor is damaged (Please resistance table operation. sensor) Main board is damaged. Connection terminal between 7 Indoor sensor is twice sensor and main stop operation board is loose or poor connection. cooling Refer to compressor maintenance sensor is damaged (Please resistance table operation. sensor) Main board is damaged. 53

5 terminal of PG Indoor fan, 8 protection of H6 11 times compressor and electric position. Control terminal of PG motor is t inserted motor. Refer to maintenance main board. inserted on main 9 protection of C5 15 times Operation of remote controller or control panel board. inserted correctly damaged. Refer to maintenance main board is abrmal. speed of capacitor is slow, 10 Indoor by zero cross detection U8 17 times Operation of remote of controller. controller or Refer to control panel maintenance Zero-crossing of main board is abrmal 54

6 11 ambient sensor 3 times compressor and fan operates. all 12 condenser sensor 4 times 1. After deenergization, 1.T-SESOR compressor and reinsert been inserted T-SESOR 2. Hardware fan operates. 2. Replace all main board 13 sensor 5 times compressor and fan operates. all 14 Limit/ decrease 6 times All loads operates operation compressor decreases. See 9.3(diagsis Refer to maintenance protection) 15 Decrease 8 times All loads operates operation compressor decreases. system is too 55

7 16 Decrease 9 times All loads operates rmally, operation compressor decreases. Refrigerant is t 2. Add refrigerant 3. Replace electronic of electronic EKV AP1 L and on wiring 17 PH 11 times rmal range and compressor is rmal, indoor fan operates. A and B ends all of electrolytic in 9.1) on control board (AP1) Please replace 18 Detection of system U5 13 times compressor AP1. Replace indoor fan AP1 operates. main board AP1. all 56

8 19 protection of P5 15 times See 9.3 (diagsis of IPM protection, compressor and fan operates. protection of all compressor) Refer to maintenance 20 Defrosting O 10s 0.5s 1:Wiring terminal OVC- 21 protection of compressor H3 3 times COMP is loose (Under rmal compressor and fan operates. all 2: See 9.3 (diagsis of protection) 1. After deenergization, insert OVC- COMP terminal 2. Refer to maintenance 22 IPM protection H5 5 times See 9.3 (diagsis of IPM protection, compressor and fan operates. protection of all compressor) Refer to maintenance 57

9 23 HC 6 times compressor and See 9.3 Refer to maintenance protection) fan operates. all 24 of compressor H7 7 times See 9.3 (diagsis of IPM protection, compressor and fan operates. protection of all compressor) Refer to maintenance 25 Lc 11 times compressor and See 9.3 (diagsis of fan operates. all Refer to maintenance 26 for compressor U1 13 times compressor and Hardware fan operates. all 1. Replace main board AP1 58

10 of read EEPROM of capacitor sensor protection EE PU P7 P8 15 times 17 times 18 times 19 times between indoor compressor and Hardware 2. Replace indoor fan operates. all Hardware 3. Replace See 9.3 compressor and (diagsis Refer to maintenance fan operates. capacitor) all compressor and Hardware 1. Replace fan operates. all system is deenergized for 20min and Radiating grease radiating grease main board is t compressor and control board fan operates. all Hardware 2. Replace 59

11 Drop protection of Limit/ decrease protection 34 abrmal U3 20 times PL 21 times EU U7 compressor and fan operates. all positions L and on wiring board compressor and 150 VAC Hardware fan operates. 2. Replace all system is deenergized for 20min and Radiating grease All loads radiating grease operates main board is t operation control board compressor decreases. Hardware 2. Replace AC175V 2. After deenergization, Wiring terminal 4V is loose or insert OVC- replace wiring operation: all Hardware 3. Replace 60

12 35 Zero-crossing U9 compressor and Hardware fan operates. all 1. Replace main board 36 Limit/ decrease protection All loads operates operation compressor decreases. speed of fan is too low close rmally replace indoor 37 fan motor L3 DC fan motor fan motor to compressor stop operation loosed 61

13 9.3 Troubleshooting for Main Malfunction 1. Malfunction of Temperature Sensor F1, F2 Main detection points: Troubleshooting for F1,F2 malfunction Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? Insert the temperature sensor tightly Is malfunction eliminated Is there short circuit due to trip - over of the parts? Make the parts upright Is malfunction eliminated Is the temperature sensor rmal according to the Resistance Table? Replace it with a temperature sensor with the same model Is malfunction removed Replace the mainboard with the same model. End 62

14 2. Malfunction of Blocked Protection of IDU Fan Motor H6 Main detection points: Troubleshooting for H6 malfunction Stir the blade with a tool to see whether the blade rotates smoothly Tighten the screw; reassemble the blade, motor and shaft bearing rubber base sub-assy to make sure there is foreign object between them Is malfunction eliminated Is the control terminal of PG motor connected tightly? Insert the control terminal of PG motor tightly Is malfunction eliminated Stir the blade by hand to see whether the blade rotate s smoothly Reinstall the blade and motor correctly Is malfunction eliminated Turn on the unit again ; measure whether the output voltage on control terminal for PG motor is more than 50V within 1 min after the louvers are opened Is the motor started up Measure the voltage of this foot to neutral wire on the mainboard Replace PG motor Is malfunction eliminated Replace the mainboard with the same model. End 63

15 3. Malfunction of Protection of Jumper Cap C5 Main detection points: Troubleshooting for C5 malfunction Is there jumper cap on the mainboard? Assemble the jumper cap with the same model Is malfunction eliminated Appearance of the jumper cap Is the jumper cap inserted correctly and tightly? Insert the jumper cap tightly Is malfunction eliminated Replace the jumper cap with the same model Is malfunction eliminated Replace the mainboard with the same model. End 64

16 4. Malfunction of Overcurrent Protection E5 Main detection points: Troubleshooting for E5 malfunction Is the supply voltage unstable with big fluctuation? ormal fluctuation is within 10 % of the rated voltage on the nameplate Malfunction is eliminated Is the supply voltage too low with overload? Adjust the supply voltage to maintain it within rmal range Malfunction is eliminated Is the indoor / outdoor heat exchanger too dirty,or are the air inlet and outlet blocked? Clean the indoor and outdoor heat exchangers and remove the blockage of air inlet and outlet Malfunction is eliminated The fan is abrmal? Fan speed is too low or fan doesn t rotate Check the motor and reinstall the motor to have the fan run rmally Malfunction is eliminated Measure the current of live wireon the main board with a clamp ampere meter. Is the current higher than the value of the overcurrent protection? Replace the mainboard with the same model Malfunction is eliminated Is there blockage inside the system? (Filth blockage, ice plug, greasy blockage, the -valve hasn t been opened completely) Flush the heat exchangers with high pressure nitrogen Malfunction is eliminated Is the compressor running abrmally? Is there abrmal sound or oil leakage; is the temperature of the shell too high, etc.? Replace the mainboard with the same model Malfunction is eliminated Replace the mainboard with the same model End 65

17 5. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8 Troubleshooting for U8 malfunction Re-energize1 minute after de-erergization U8 is still displayed es o The unit returns to rmal. Conclusion:U8 is displayed due to instant energization afte deenergization while the capacitor discharges slowly. The zero-cross detection circuit of the mainboard is defined abrmal.replace the mainboard with the same model End 66

18 6.Capacity charging malfunction (outdoor unit malfunction) (AP1 below means control board of outdoor unit) Main detection points: Turn on the unit and wait 1 minute Use AC voltmeter to measure the voltage on the two ends of electrolytic capacitor (see fig 30) Voltage higher than 200V? Malfunction of the outdoor mainboard AP1 Replace outdoor mainboard Measure the voltage input with AC voltmeter (see fig 30) Voltage within 180VAC~260VAC? Power supply is abrmal; repair the power supply to restore the range between 180VAC ~260VAC Power on and restart the unit Is the Vmalfunction eliminated? Shut down the power and wait 20 minutes; or use DC voltmeter to measure the voltage on the two ends of electrolytic capacitor until the voltage is lower than 20V Check the connection of reactor and connection wire If the wiring of reactor L is rmal? Connect the connection wire of reactor L correctly Power on and restart the unit Is the Vmalfunction eliminated? Replace outdoor mainboard AP1 End 67

19 7.IPM protection(h5), desynchronizing malfunction(h7), overcurrent of compressor phase current (P5) (AP1 below means control board of outdoor unit) Main detection points: H5, H7 or P5 is displayed after turning on the unit Measure if the voltage input is within 180~265V with AC voltmeter (see fig 30) Repair power supply to make the power voltage rmal Restart the unit The unit starts operation again The compressor is well connected with mainboard AP1? Adjust it properly according to wiring diagram 5.1 Restart the unit The unit starts operation again Heat exchanger is blocked with dirt? Clean the heat exchanger to improve its performance Restart the unit The unit starts operation again Check if system pressure is too high? Adjust refrigerant charging amount Restart the unit The unit starts operation again Replace outdoor mainboard AP1 Does the unit work rmally Replace compressor End 68

20 8.High temperature and overload protection (E8)(AP1 below means control board of outdoor unit) Main detection points: E8 is displayed If the outdoor ambient temperature is higher than 53? ormal protection, please use it after improving the outdoor ambient temperature Unit restarts rmally If the radiating of indoor and outdoor unit is good? Improve the radiating environment of unit (clean the heat exchanger and remove surrounding obstacles) Unit restarts rmally If the indoor and outdoor fan are running rmally? Connect rmally? Adjust the connection Replace outdoor mainboard Fan capacitor is broken? Replace Fan capacitor Motor is broken? Replace Motor Replace mainboard End 69

21 9.Start-up failure (LC) (AP1 below means control board of outdoor unit) Main detection points: Turn on the unit If the stop time of compressor is more than 3min? The stop time is t sufficient and the high and low pressure of system is t balanced, please start the unit after 3min If the compressor wire COMP(UVW) is well connected and connection sequence is correct? Check the connection situation of outdoor mainboard AP1 and compressor COMP, and the connect it according to wiring diagram Does the unit start up rmally? If the refrigerant charging amount is too much? Charge the refrigerant according to service manual Does the unit start up rmally? Replace outdoor mainboard AP1 Is the malfunction eliminated? Replace the compressor End 70

22 10.Overload and high discharge temperature malfunction Main detection points: 71

23 H3 or E4 is displayed 30min after power off the unit If the overload protector SAT is well connected? Under ambient temperature, test the resistance of overload protector with ohmmeter; resistance value should be 1000ohm If the wiring terminal FA of electronic expansion valve is well connected? Connect wire according to wiring diagram Replace EKV coil of electronic expansion valve Is the malfunction eliminated? Replace overload protector SAT Check the situation of refrigerant; if there is leakage, please charge refrigerant according to the service manual Is the malfunction eliminated? Compressor overload protection terminal is t connected well with the mainboard; reconnect them correctly Is the malfunction eliminated? Heat exchange of unit is t good (heat exchanger is dirty and unit radiating environment is bad); improve the radiating environment and clean the heat exchanger Is the malfunction eliminated? Too much load of the system causes high temperature of compressor after working for a long time; decrease the load for operation Is the malfunction eliminated? Replace outdoor mainboard AP1 End 72

24 11.PFC (correction for power factor) malfunction (outdoor unit malfunction) Main detection points: start If power plug is connected well with the socket Connect the plug correctly Is the malfunction eliminated? Check the connection wire between reactor mainboard and situation of connection If there is short circuit or the connection wire is loose? Reconnect the wire or replace the connection wire according to the wiring diagram. Power on and restart the unit Is the malfunction eliminated? Check the surface of reactor coil If it is damaged? Replace the reactor Power on and restart the unit Is the malfunction eliminated? Replace outdoor mainboard AP1 End 73

25 12.Communication malfunction (E6) Main detection points: E6 If the unit operates rmally before malfunction Check the connection wire according to the wiring diagram. Check built-in wiring of indoor and outdoor unit If the connection wire is connected well? Replace the wire If the wiring is damaged? Reconnect the wire or replace the connection wire according to the wiring diagram. Is the malfunction eliminated? Check the malfunction type with communication malfunction detector Is the malfunction eliminated? Malfunction of outdoor communication circuit Replace outdoor mainboard AP1 Replace indoor mainboard AP2 Is the malfunction eliminated? End 74

26 9.4 Troubleshooting for ormal Malfunction 1. Air Conditioner Can't be Started Up Wrong wire connection between or poor connection for wiring terminals 2. Poor Cooling (Heating) for Air Conditioner motor is set too low Small wind blow conditioner Add refrigerant. range Compressor can't operate connected well. reliably correctly once improper Replace batteries for remote controller Repair or replace remote controller details details details 3. Horizontal Louver Can't Swing Wrong wire connection, or poor connection diagram Connect wires according to wiring diagram to Stepping motor is damaged Stepping motor can't operate Repair or replace stepping motor Main board is damaged can't operate 75

27 4. ODU Fan Motor Can't Operate Wrong wire connection, or poor connection 5. Compressor Can't Operate Wrong wire connection, or poor connection 6. Air Conditioner is Leaking 7. Abrmal Sound and Vibration conditioner coil compressor diagram diagram Connect wires according to wiring diagram to damaged fan capacitor. is bad and ODU compressor generates a lot of Connect wires according to wiring diagram to Capacity of compressor is damaged fan capacitor. Repair or replace compressor between compressor terminals and it's 0 Compressor can't operate Repair or replace compressor Service Manual pipe Replace drain pipe damping plaster between connected parts Replace magnetic coil 76

28 Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit Models:GWH18MC-K3DA4H/I GWH18MC-K3DA2H/I MODE O / OFF FA CLOCK TIMER O X-FA TEMP TIMER OFF TURBO SLEEP LIGHT

29 Part Code Description O. GWH18MC-K3DA4H/I GWH18MC-K3DA2H/I Qty CB CB Rear Case assy Ring of Bearing Motor Press Plate Pipe Clamp Drainage Hose Step Motor Display Board Electric Box Terminal Board Main Board Capacitor CBB Electric Box Assy Connecting Cable Remote Controller

30 Service Manual Models:GWH24MD-K3DA4H/I GWH24MD-K3DA2H/I MODE O / OFF 15 FA CLOCK 7 TIMER O X-FA TEMP TIMER OFF TURBO SLEEP LIGHT

31 Part Code Description O. GWH24MD-K3DA4H/I GWH24MD-K3DA2H/I Qty CB CB Rear Case assy Ring of Bearing Motor Press Plate Pipe Clamp Drainage Hose Step Motor Display Board Electric Box Terminal Board Main Board Capacitor CBB Electric Box Assy Connecting Cable Connecting Cable Remote Controller

32 O/ OFF MODE FA CLOCK TIMER O X-FA TEMP TIMER OFF TURBO SLEEP LIGHT Service Manual Models:GWH24ME-K3DA4A/I GWH24ME-K3DA1A/I GWH28ME-K3DA4H/I GWH28ME-K3DA1H/I

33 Part Code Description O. GWH24ME-K3DA4A/I GWH28ME-K3DA4H/I Qty CB CB Water Tray Pipe Clamp Drainage Hose Step Motor Electric Box Assy Electric Box Capacitor CBB Terminal Board Main Board Display Board S S 1 38 Remote Controller Connecting Cable Connecting Cable

34 Part Code Description O. GWH24ME-K3DA1A/I GWH28ME-K3DA1H/I Qty CB CB Water Tray Pipe Clamp Drainage Hose Step Motor Electric Box Assy Electric Box Capacitor CBB61 / / 1 33 Terminal Board Main Board Display Board S S 1 38 Remote Controller Connecting Cable / / 0 40 Connecting Cable

35 Service Manual 10.2 Outdoor Unit Models:GWH18MC-K3DA4H/O(DRED) GWH24MD-K3DA4H/O(DRED)

36 Part Code Description O. GWH18MC-K3DA4H/O(DRED) GWH24MD-K3DA4H/O(DRED) Qty CB161W03101 CB161W P P Drainage Connecter P P Capacitor CBB P P P P Handle Electric Box Assy Magnet Coil Wiring clamp Rear Grill Condenser Assy P P Left Handle Reactor Left Side Plate P P

37 Models:GWH24ME-K3DA3A/O(DRED) GWH28ME-K3DA4H/O(DRED) 86

38 Part Code Description O. GWH24ME-K3DA3A/O(DRED) GWH28ME-K3DA4H/O(DRED) Qty CB171W04401 CB161W Cabinet P P 1 3 Left Handle P P P P 1 6 Drainage Connecter Reactor Electric Box Assy P P P P Big Handle Capacitor Clamp Capacitor CBB Magnet Coil Wiring Clamp Rear Grill Condenser Assy P P 1 29 Clapboard Assy Left Side Plate P P