Midea M-Thermal Series Service Manual page 65

M‐Thermal Split
4.16 P3 Troubleshooting
Digital display output
Description
 Compressor current protection.
 When the compressor current rises above the protection value (4/6kW models 18A, 8/10kW model 19A), the system
displays P3 protection and M‐Thermal Split 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
 Poor condenser heat exchange.
 High pressure side blockage.
 Inverter module damaged.
 Compressor damaged.
 Outdoor unit main PCB damaged.
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