Ductlessair Mini Split AC Error Codes



Indoor Unit Error Display

Operation lamp-Timer lamp-Display-LED STATUS

☆ 1 time X E0 Indoor unit EEPROM parameter error
☆ 2 times X E1 Indoor / outdoor units communication error
☆ 3 times X E2 Zero-crossing signal detection error
☆ 4 times X E3 Indoor fan speed has been out of control
☆ 5 times X E4 Indoor room temperature sensor T1 open circuit or short circuit
☆ 6 times X E5 Evaporator coil temperature sensor T2 open circuit or short circuit
☆ 7 times X EC Refrigerant leakage detection
☆ 2 times O F1 Outdoor temperature sensor T4 open circuit or short circuit
☆ 3 times O F2 Condenser coil temperature sensor T3 open circuit or short circuit
☆ 4 times O F3 Compressor discharge temperature sensor T5 open circuit or short circuit
☆ 5 times O F4 Outdoor unit EEPROM parameter error
☆ 6 times O F5 Outdoor fan speed has been out of control(only for)
☆ 1 times ☆ P0 IPM malfunction or IGBT over-strong current protection
☆ 2 times ☆ P1 Over voltage or over low voltage protection
☆ 3 times ☆ P2 High temperature protection of compressor top diagnosis and solution(only for MS11D-21HRDN1-MN5Q1W model)
☆ 5 times ☆ P4 Inverter compressor drive error





OUTDOOR UNIT ERROR DISPLAY

 

EEPROM parameter error diagnosis and solution(E0/F4) – Installation mistake ● PCB faulty

Indoor / outdoor unit’s communication diagnosis and solution(E1) – Wiring mistake ● Indoor or outdoor PCB faulty

Zero crossing detection error diagnosis and solution(E2) – Connection mistake ● PCB faulty

Fan speed has been out of control diagnosis and solution(E3) – Wiring mistake ● Fan ass’y faulty ● Fan motor faulty ● PCB faulty

5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5) – Wiring mistake ● Sensor faulty

Refrigerant Leakage Detection diagnosis and solution(EC) –  T2 sensor faulty ● Indoor PCB faulty ● System problems, such as leakage or blocking

IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) – Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty Compressor malfunction; Outdoor PCB faulty

Over voltage or too low voltage protection diagnosis and solution(P1) – Power supply problems. ● System leakage or block ● PCB faulty

High temperature protection of compressor top diagnosis and solution(P2) – Power supply problems. ● System leakage or block ● PCB faulty

Inverter compressor drive error diagnosis and solution(P4) – Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty Compressor malfunction; Outdoor PCB faulty



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