Serene Plus Series Error Codes
From Technical Support Wiki
| Code | Reason | Remark |
|---|---|---|
| E0 | IDU & ODU communication failure. | Check wiring between indoor and outdoor unit. |
| E1 | IDU room temperature sensor failure. | Check IDU room temperature sensor and IDU PCB. |
| E2 | IDU coil temperature sensor failure. | Check IDU coil tempeature sensor and IDU PCB. |
| E3 | ODU coil temperature sensor failure. | Check ODU coil temperature sensor and ODU PCB. |
| E4 | AC cooling system abnormal. | Check for refrigerant leakage, 2-way or 3-way valve blockage, etc. |
| E5 | IDU/ODU mismatch failure. | IDU and ODU model number mismatch. |
| E6 | IDU PG fan motor / DC fan motor abnormality. | Check fan motor, fan blade and PCB. |
| E7 | ODU ambient temperature sensor failure. | Check ODU ambient temperature sensor and ODU PCB. |
| E8 | ODU discharge temperature sensor failure. | Check ODU discharge temperature sensor and ODU PCB. |
| E9 | IPM / Compressor driving control abnormal. | Check ODU PCB and compressor. |
| EA | ODU current test circuit failure. | Check ODU PCB. |
| Eb | Communication abnormal between IDU PCB and IDU display board. | Check display board and IDU PCB. |
| EE | ODU EEPROM failure. | Check ODU PCB or re-power AC unit. |
| EF | ODU DC fan motor failure. | Check ODU fan motor or ODU PCB. |
| EU | ODU voltage test circuit abnormal. | Check ODU PCB. |
| P0 | IPM module protection | Check ODU PCB. |
| P1 | Over / under voltage protection. | Check ODU PCB and power supply. |
| P2 | Over current protection. | Check ODU PCB and power supply. |
| P4 | ODU discharge pipe over temperature protection. | Please refer to service manual for details. |
| P5 | Sub-cooling protection on Cooling mode. | Please refer to service manual for details. |
| P6 | Overheating protection on Cooling mode. | Please refer to service manual for details. |
| P7 | Overheating protection on Heating mode. | Please refer to service manual for details. |
| P8 | Outdoor over temperature/under temperature protection | Please refer to service manual for details. |
| P9 | Compressor driving protection (load abnormal). | Please refer to service manual for details. |
| PA | Communication failure for TOP flow unit / preset mode conflict. (IDU failure) | Please refer to service manual for details. |
| F0 | Infrared customer feeling test sensor failure. (IDU failure) | Querying by pressing remote controller. |
| F1 | Electric power test module failure. (IDU failure) | Querying by pressing remote controller. |
| F2 | Discharge temperature sensor failure protection. | Please refer to service manual for details. |
| F3 | ODU coil temperature failure protection. | Please refer to service manual for details. |
| F4 | Cooling system gas flow abnormal protection. | Please refer to service manual for details. |
| F5 | PFC protection. | Please refer to service manual for details. |
| F6 | The compressor lack of phase / anti-phase protection. | Please refer to service manual for details. |
| F7 | IPM module temperature protection. | Please refer to service manual for details. |
| F8 | 4-Way Valve reversing abnormal. | Please refer to service manual for details. |
| F9 | The module temperature test circuit failure. | Check ODU PCB. |
| FA | The compressor phase-current test circuit failure. | Check ODU PCB. |