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 |
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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