Diagnostic codes covered
PC 04, PC04
- PC 04 – Inverter Compressor Drive Error
Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Recommended parts to prepare: Connection wires, IPM module board, Outdoor fan assembly, Compressor, Outdoor PCB Troubleshooting and repair: YES NO NO YES NO YES NO YES
Troubleshooting workflow
Related diagnostic checks
Workflow source: original 37MGRA-02SM service-manual PDF. Error-code names cross-checked against 37MGRA-04SI.