Daikin FTXJ-M Service Manual page 4

ESIE16-02K |
2.2.2.19. "L1-00" - Outdoor main PCB abnormality ..............................................................................................35
2.2.2.20. "L3-00" - Switch box temperature abnormality ......................................................................................36
2.2.2.21. "L4-00" - Inverter radiating fin temperature abnormality ........................................................................36
2.2.2.22. "L5-00" - Inverter instantaneous overcurrent (AC output) ..................................................................... 37
2.2.2.23. "P4-00" - Radiating fin temperature sensor abnormality .......................................................................38
2.2.3. System ......................................................................................................................................................... 39
2.2.3.1. "U0-00" - Refrigerant shortage ................................................................................................................39
2.2.3.2. "U2-00" - Power supply abnormality or instantaneous power failure .......................................................39
2.2.3.3. "U3-00" - Check operation not executed or transmission error ...............................................................40
2.2.3.4. "U4-00" - Transmission abnormality between indoor unit and outdoor unit .............................................41
2.2.3.5. "U5-00" - Malfunction of transmission between indoor unit and remote controller ..................................41
2.2.3.6. "U7-00" - Transmission outdoor unit-outdoor unit abnormality ................................................................42
2.2.3.7. "UA-00" - Improper combination of indoor unit and outdoor unit .............................................................42
2.2.3.8. "UF-00" - Wiring and piping mismatch .....................................................................................................43
2.3. Symptom based troubleshooting ............................................................................................................ 44
2.3.1. Operation does not start ............................................................................................................................... 44
2.3.2. Operation sometimes stops ......................................................................................................................... 44
2.3.3. Some indoor units do not operate ................................................................................................................ 45
2.3.4. Operation starts but the unit does not cool/heat .......................................................................................... 45
2.3.5. Operating noise and vibrations .................................................................................................................... 45
2.3.6. Abnormal high pressure ............................................................................................................................... 46
2.3.7. Abnormal low pressure ................................................................................................................................ 46
2.3.8. Indoor fan starts operating but the compressor does not operate ............................................................... 47
2.3.9. Operation starts and the unit stops immediately .......................................................................................... 48
2.3.10. Operation stops, unit cannot start for a while ............................................................................................. 48
2.3.11. Indoor unit .................................................................................................................................................. 48
2.3.12. Outdoor unit ............................................................................................................................................... 48
2.3.13. System ....................................................................................................................................................... 48
2.3.14. Others ........................................................................................................................................................ 48
2.4. Component checklist ............................................................................................................................... 49
2.4.1. Indoor unit .................................................................................................................................................... 50
2.4.1.1. Fan motor .................................................................................................................................................50
2.4.2. Outdoor unit ................................................................................................................................................. 51
2.4.2.1. 4-way valve ..............................................................................................................................................51
2.4.2.2. Compressor ..............................................................................................................................................53
2.4.2.3. Electronic expansion valve ....................................................................................................................... 55
2.4.2.4. Fan motor .................................................................................................................................................57
2.4.2.5. Main PCB .................................................................................................................................................57
2.4.2.6. Refrigerant thermistors .............................................................................................................................58
Part 3. Repair ............................................................................................................................61
3.1. Refrigerant repair procedures ................................................................................................................. 61
3.1.1. Refrigerant piping handling .......................................................................................................................... 61
3.1.2. Recovery procedure ..................................................................................................................................... 61
3.1.2.1. Outdoor unit casing ..................................................................................................................................61
3.1.3. Refrigerant pump down ................................................................................................................................ 63
3.1.4. Piping repair procedures .............................................................................................................................. 64
3.2. Service tools ........................................................................................................................................... 65
3.3. Unit specific repair procedures ............................................................................................................... 66
3.3.1. Indoor unit .................................................................................................................................................... 67
3.3.1.1. Replacing R32 sensor (only for FVXM-F model) .....................................................................................67
3.3.2. Outdoor unit ................................................................................................................................................. 69
3.3.2.1. Basic removal ...........................................................................................................................................69
3.3.2.2. Replacing switch box ...............................................................................................................................72
3.3.2.3. Replacing 4-way valve body ....................................................................................................................74
3.3.2.4. Replacing 4-way valve coil ....................................................................................................................... 76
3.3.2.5. Replacing compressor .............................................................................................................................77
3.3.2.6. Replacing DC fan motor assembly ...........................................................................................................80
3.3.2.7. Replacing expansion valve body ..............................................................................................................82
Page 4
RA R32 Split & multi split M-Series
31/05/21 | Version 1.1