Midea AC Error Codes and Troubleshooting

Check Code	Diagnosis of malfunction
E0	EEPROM parameter error
E1	Indoor /outdoor units communication protection
E2	Zero-crossing signal error
E3	Fan speed out of control
E5	Open or short circuit of outdoor temperature sensor
E6	Open or short circuit of room or evaporator temperature sensor
P0	IGBT over-strong current protection
P1	Over voltage or too under voltage protection
P2	Temperature protection of compressor top.
P4	Inverter compressor drive error

Midea Air Conditioner 9A Series Error Codes; 

Error Code: E0

Malfunction: EEPROM error

Error Code: E1

Malfunction: Indoor / outdoor units communication protection

Error Code: E2

Malfunction: Zero-crossing signal error

Error Code: E3

Malfunction: Indoor fan speed out of control

Error Code: E5

Malfunction: Outdoor unit temp. sensor or connector of temp. sensor is defective

Error Code: E6

Malfunction: Open or short circuit of room or evaporator temperature

Error Code: E7

Malfunction: Outdoor fan speed out of control

Error Code: P0

Malfunction: IBM malfunction or IGBT over-strong current protection

Error Code: P1

Malfunction: Over voltage or too under voltage protection

Error Code: P2

Malfunction: Temperature protection of compressor top.

Error Code: P4

Malfunction: Compressor position protection

Error Code: P5

Malfunction: Inverter module protection

Midea AC Outdoor Units Error Codes (Except M5OA-36HRDN1-Q Model);

Error Code: E0

Malfunction: EEPROM error

Error Code: E1

Malfunction: No A Indoor unit coil outlet temp. sensor or connector of sensor is defective

Error Code: E2

Malfunction: No B Indoor unit coil outlet temp. sensor or connector of sensor is defective

Error Code: E3

Malfunction: No C Indoor unit coil outlet temp. sensor or connector of sensor is defective

Error Code: E6

Malfunction: No D Indoor unit coil outlet temp. sensor or connector of sensor is defective

Error Code: E4

Malfunction: Outdoor unit temp. sensor or connector of temp. sensor is defective

Error Code: E5

Malfunction: Compressor voltage protection

Error Code: E7

Malfunction: Communication malfunction between outdoor main chip and compressor control chip

Error Code: P0

Malfunction: Temperature protection of compressor discharge or compressor top. For M4OC-36HRDN1-Q,it only means compressor discharge temp.protection.

Error Code: P1

Malfunction:  High pressure protection(only for M4OC1-27HRDN1-Q, M4OC-36HRDN1-Q)

Error Code: P2

Malfunction:  Low pressure protection(only for M4OC1-27HRDN1-Q, M4OC-36HRDN1-Q)

Error Code: P3

Malfunction:  Compressor current protection

Error Code: P4

Malfunction:  Inverter module protection

Error Code: P6

Malfunction: Condenser high-temperature protection