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DIAGNOSIS AND SOLUTION (CONT)
IPM malfunction or IGBT over−strong current protection diagnosis and solution (P0)
Error Code P0
Malfunction decision conditions
When the voltage signal, that the IPM sends to the compressor drive chip is abnormal, the display
LED displays P0”and the air conditioner turns off.
Supposed causes
S Wiring mistake
S IPM malfunction
S Outdoor fan assembly faulty
S Compressor malfunction
S Outdoor PCB faulty
Troubleshooting
Check the wiring between main the
PCB and the compressor
Correct the connection or replace
the wires and connectors.
Yes
No
Check the IPM No
Yes
Replace the IPM board or replace
the main PCB
Check the outdoor fan and the
outdoor unit ventilation
No
Please refer to the solution of ǏFan
Speed Has Been Out Of Controlǐ
malfunction
Yes
Check the compressor resistance
values
No
Replace the compressor.
Yes
Replace the outdoor main PCB
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