|E0||Indoor unit EEPROM error|
|E1||Communication malfunction between indoor and outdoor units|
|E3||Indoor fan speed has been out of control|
|E4||Indoor room temperature sensor T1 open circuit or short circuit|
|E5||Evaporator coil temprerature sensor T2 open circuit or short circuit|
|EC||Refrigerant leakage detection|
|EE||Water-level alarm malfunction|
|F1||Open circuit or short circuit of outdoor ambient temperature sensor T4|
|F2||Open circuit or short circuit|
|F3||Open circuit or short circuit of compressor discharge temperature sensor T5|
|F4||Outdoor unit EEPROM error|
|F5||Outdoor fan speed has been out of control|
|F6||Out unit low side value temperature sensor (T2B) open circuit or short circuit|
|F7||Lifting-panel communication error|
|F9||Lifting-panel is not closed|
|P1||Over voltage or over low voltage protection|
|P2||High temperature protection of compressor top. High pressure protection|
|P3||Outdoor low temperature protection|
|P4||Inverter compressor drive error|
|P7||Outdoor IGBT temperature sensor error|
On, Off, cF, dF, SC, FP Display Code Meanings;
On: for 3 seconds when:
- TIMER ON is set
- FRESH, SWING, TURBO, or SILENCE features are turned on
OF: for 3 seconds when:
- TIMER OFF is set
- FRESH, SWING, TURBO, or SILENCE features are turned off
cF: when anti-cold air feature is turned on
dF: when defrosting
SC: when unit is self-cleaning
FP: when freeze protection is turned on
Outdoor Unit Error Display
|E0||Outdoor EEPROM malfunction|
|E2||Communication malfunction between indoor and outdoor units|
|E3||Communication malfunction between IPM board and outdoor main board|
|E4||Open or short circuit of outdoor temperature sensor (T3、T4、T5)|
|E6||Active PFC module protection|
|E8||Outdoor fan speed has been out of control (Only for DC fan motor models)|
|F1||No A Indoor unit coil outlet temperature sensor(T2B) open circuit or short circuit.|
|F2||No B Indoor unit coil outlet temperature sensor(T2B) open circuit or short circuit.|
|F3||No C Indoor unit coil outlet temperature sensor(T2B) open circuit or short circuit.|
|F4||No D Indoor unit coil outlet temperature sensor(T2B) open circuit or short circuit.|
|F5||No E Indoor unit coil outlet temperature sensor(T2B) open circuit or short circuit|
|F6||No F Indoor unit coil outlet temperature sensor(T2B) open circuit or short circuit.|
|P0||Temperature protection of compressor top|
|P1||High pressure protection|
|P2||Low pressure protection|
|P3||Current protection of compressor|
|P4||Temperature protection of compressor discharge|
|P5||High temperature protection of condenser|
|P6||IPM module protection|
Comfortstar AC Troubleshooting
The following problems are not a malfunction and in most situations will not require repairs.
Issue: Unit does not turn on when pressing ON/OFF button
Possible Causes: The Unit has a 3-minute protection feature that prevents the unit from overloading. The unit cannot be restarted within three minutes of being turned off.
Issue: The unit changes from COOL/HEAT mode to FAN mode
- The unit may change its setting to prevent frost from forming on the unit. Once the temperature increases, the unit will start operating in the previously selected mode again.
- The set temperature has been reached, at which point the unit turns off the compressor. The unit will continue operating when the temperature fluctuates again.
Issue: The indoor unit emits white mist
Possible Causes: In humid regions, a large temperature difference between the room’s air and the conditioned air can cause white mist.
Issue: Both the indoor and outdoor units emit white mist
Possible Causes: When the unit restarts in HEAT mode after defrosting, white mist may be emitted due to moisture generated from the defrosting process.
Issue: The indoor unit makes noises
- A rushing air sound may occur when the louver resets its position.
- A squeaking sound may occur after running the unit in HEAT mode due to expansion and contraction of the unit’s plastic parts.
Issue: Both the indoor unit and outdoor unit make noises
- Low hissing sound during operation: This is normal and is caused by refrigerant gas flowing through both indoor and outdoor units.
- Low hissing sound when the system starts, has just stopped running, or is defrosting: This noise is normal and is caused by the refrigerant gas stopping or changing direction.
- Squeaking sound: Normal expansion and contraction of plastic and metal parts caused by temperature changes during operation can cause squeaking noises.
Issue: The outdoor unit makes noises
Possible Causes: The unit will make different sounds based on its current operating mode.
Issue: Dust is emitted from either the indoor or outdoor unit
Possible Causes: The unit may accumulate dust during extended periods of non-use, which will be emitted when the unit is turned on. This can be mitigated by covering the unit during long periods of inactivity.
Issue: The unit emits a bad odor
- The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will be emitted during operations.
- The unit’s filters have become moldy and should be cleaned.