DuctlessAire Air Conditioner Error Codes
DuctlessAire Air Conditioner Error Codes

DuctlessAire Air Conditioner Error Codes

DuctlessAire Air Conditioner Error Codes But no ductless mini split is flawless. There’s always a possibility your mini split will malfunction. To identify what is malfunctioning, you’ll want to locate where the mini split error codes are displayed. Understanding what these codes mean can help you kickstart mini split repair, especially if professional help is required.

DuctlessAire Air Conditioner Error Code Solutions

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

Error Code: P4

Malfunction decision conditions: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on.

Error Code: P2

Malfunction decision conditions: If the sampling voltage is not 5V, the LED will display the failure.

Error Code: P1

Malfunction decision conditions: An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.

Error Code: P0

Malfunction decision conditions: When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off.

Error Code: EC

Malfunction decision conditions: Define the evaporator coil temp.T2 of the compressor just starts running as Tcool.

Error Code: E5

Malfunction decision conditions: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.

Error Code: E3

Malfunction decision conditions: When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure.

Error Code: E2

Malfunction decision conditions: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal.

Error Code: E1

Malfunction decision conditions: Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition happens four times continuously.

Error Code: E0/F4

Malfunction decision conditions: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.

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