York HP Series Service Manual page 103

16.4.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0)
Error Code
Malfunction
conditions
Possible causes
Trouble shooting:
P0
When the voltage signal the IPM sends to the compressor drive
chip is abnormal, the display LED shows "P0" and the AC turn
Wiring mistake
●
IPM malfunction
●
Faulty outdoor fan assembly
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