HVAC Toolkit
M

Midea Error Codes

Inverter Mini-Splits & Air Conditioners ยท China

Prefixes: E=System/Sensor, F=Sensor/Protection, P=Protection, H=Status

E-Series (System/Sensor Errors)

Code Description Possible Cause Action
E0 EEPROM parameter error Indoor EEPROM data corrupted Reset power; replace PCB if persists
E1 Indoor/outdoor communication error Signal wiring disconnected Check communication wiring between units
E2 Zero crossing error Power supply frequency abnormal Check power supply quality
E3 Indoor fan speed error Fan motor speed out of control Check fan motor and drive circuit
E4 Room temperature sensor fault T1 sensor open or short Check room temperature sensor
E5 Evaporator temperature sensor fault T2 sensor open or short Check evaporator coil sensor
E6 Outdoor temperature sensor fault T3 sensor open or short Check outdoor coil sensor
E8 Duplex communication error Address conflict on communication bus Reset unit addresses
E9 Expansion valve fault EEV driver or valve failure Check EEV coil and wiring
EC Refrigerant leak detection Leak sensor activated Leak test, repair, and recharge system

F-Series (Sensor/Protection Codes)

Code Description Possible Cause Action
F0 Outdoor EEPROM error Outdoor unit EEPROM fault Reset power; replace outdoor PCB if needed
F1 Outdoor ambient sensor fault T4 thermistor failure Check outdoor ambient sensor
F2 Condenser coil sensor fault Condenser thermistor failure Check condenser sensor
F3 Discharge temperature sensor fault T5 thermistor failure Check compressor discharge sensor
F4 Suction temperature sensor fault Suction line thermistor failure Check suction line sensor

P-Series (Protection Codes)

Code Description Possible Cause Action
P0 IPM module protection Inverter module overcurrent Check IPM module and compressor
P1 Over/under voltage protection Supply voltage out of range Check power supply voltage
P2 Compressor top temperature protection Compressor overheating Check superheat, charge, airflow
P3 High current protection System drawing excess current Check compressor and wiring
P4 Inverter drive error Drive board fault Check inverter board and compressor wiring
P5 DC fan motor fault Outdoor fan feedback error Check DC fan motor and wiring
P6 Heat sink temperature high Inverter heat sink overheating Check outdoor unit ventilation

Midea Troubleshooting Tips

Before Calling for Service

  • Turn off unit, wait 5 minutes, then restart - some errors auto-reset
  • Check and clean air filters - many errors caused by restricted airflow
  • Verify power supply voltage is within specification
  • Check circuit breaker and disconnect switch
  • Note the exact error code and when it occurs for technician

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