37MGRA PC 43 (ODU compressor lack phase protection diagnosis and solution)

37MGRA Diagnostic Codes

Diagnostic codes covered

PC 43

Description: When the three-phase sampling current of the compressor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code. Recommended parts to prepare: Connection wire, Compressor, Outdoor PCB Troubleshooting and repair:

Troubleshooting workflow

PC 43 (ODU compressor lack phase protection diagnosis and solution) workflow
PC43 (ODU compressor lack phase protection diagnosis and solution) workflow

Related diagnostic checks

Workflow source: original 37MGRA-02SM service-manual PDF. Error-code names cross-checked against 37MGRA-04SI.

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