M thermal Mono
202008 61
4.17 P3 Troubleshooting
Digital display output 4.17.1
Description 4.17.2
Compressor current protection.
When the compressor current rises above the protection value (28A), the system displays P3 protection and M
thermal Mono stops running. When the current returns to the normal range, P3 is removed and normal operation
resumes.
Error code is displayed on refrigerant system main PCB and user interface.
Possible causes 4.17.3
Poor condenser heat exchange.
High pressure side blockage.
Inverter module damaged.
Compressor damaged.
Outdoor unit main PCB damaged.
Midea CAC