37MUHA Fault Codes PC 08, PC 42, PC 44, PC 46, PC 49 – Compressor Current and Speed Protection
The outdoor unit has detected abnormal compressor current, starting, or speed.
PC 42
37MGRA PC 08 (Current overload protection)/ PC 42 (Compressor start failure of outdoor unit)/ PC 44 (ODU zero speed protection) / PC 46 (Compressor speed has been out of control)/ PC 49 (Compressor overcurrent failure)
Troubleshooting workflow for PC 08, PC 42, PC 44, PC 46, PC 49.