Difference between revisions of "Serene Plus Series Error Codes"

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| Check ODU PCB and power supply.  
 
| Check ODU PCB and power supply.  
 
|-
 
|-
 +
| P2
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| 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
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| 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.
 +
|-
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| 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.
 +
|-
 +
| Fb
 +
| Limiting/reducing frequency for overload protection on Cooling/Heating mode.
 +
| Querying by pressing remote controller.
 +
|-
 +
| FC
 +
| Limiting/reducing frequency for high power consumption protection.
 +
| Querying by pressing remote controller.
 +
|-
 +
| FE
 +
| Limiting/reducing frequency for module current protection (phase current of compressor)
 +
| Querying by pressing remote controller.
 +
|-
 +
| FF
 +
| Limiting/reducing frequency for module temperature protection.
 +
| Querying by pressing remote controller.
 +
|-
 +
| FH
 +
| Limiting/reducing frequency for compressor driving protection.
 +
| Querying by pressing remote controller.
 +
|-
 +
| FP
 +
| Limiting/reducing frequency anti-condensation protection.
 +
| Querying by pressing remote controller.
 +
|-
 +
| FU
 +
| Limiting/reducing frequency for anti-frost protection.
 +
| Querying by pressing remote controller.
 +
|-
 +
| Fj
 +
| Limiting/reducing frequency for discharge over temperature protection.
 +
| Querying by pressing remote controller.
 +
|-
 +
| Fn
 +
| Limiting/reducing frequency for ODU AC current protection.
 +
| Querying by pressing remote controller.
 +
|-
 +
| Fy
 +
| Gas leakage protection.
 +
| Please refer to service manual for details.
 +
|-
 +
| bf
 +
| TVOC sensor failure. (IDU failure, optional)
 +
| Querying by pressing remote controller.
 +
|-
 +
| bc
 +
| PM2.5 sensor failure. (IDU failure, optional)
 +
| Querying by pressing remote controller.
 +
|-
 +
| bj
 +
| Humidity sensor failure. (IDU failure)
 +
| Querying by pressing remote controller.
 +
|-
 +
| CL
 +
| Filter cleaning reminder.
 +
| Turn off power, clean filter than turn on power again.
 
|}
 
|}
 +
 +
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Latest revision as of 18:59, 22 January 2026

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.
Fb Limiting/reducing frequency for overload protection on Cooling/Heating mode. Querying by pressing remote controller.
FC Limiting/reducing frequency for high power consumption protection. Querying by pressing remote controller.
FE Limiting/reducing frequency for module current protection (phase current of compressor) Querying by pressing remote controller.
FF Limiting/reducing frequency for module temperature protection. Querying by pressing remote controller.
FH Limiting/reducing frequency for compressor driving protection. Querying by pressing remote controller.
FP Limiting/reducing frequency anti-condensation protection. Querying by pressing remote controller.
FU Limiting/reducing frequency for anti-frost protection. Querying by pressing remote controller.
Fj Limiting/reducing frequency for discharge over temperature protection. Querying by pressing remote controller.
Fn Limiting/reducing frequency for ODU AC current protection. Querying by pressing remote controller.
Fy Gas leakage protection. Please refer to service manual for details.
bf TVOC sensor failure. (IDU failure, optional) Querying by pressing remote controller.
bc PM2.5 sensor failure. (IDU failure, optional) Querying by pressing remote controller.
bj Humidity sensor failure. (IDU failure) Querying by pressing remote controller.
CL Filter cleaning reminder. Turn off power, clean filter than turn on power again.

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