Comfort Air AC Error Codes
Some issues can be resolved without maintenance
of the unit, check the chart below to see suggested solutions to the problem
before calling for service.
Glossary of error
codes and their meanings:
Error code meaning
Error code meaning
E1 High Pressure
Protection
E2 shutdown for
whole unit antifreeze protection
E3 low pressure
protection
E4 High Discharge
Temporary Protection
E6 communication
error
E9 indoor unit water
full error
Fo Refrigerant
Recovery Mode
F3 Outdoor Ambient
Temp Sensor Error
F4 Outdoor Mid-coil
Temp Sensor Error
F5 outdoor discharge
air temp sensor error
F7 oil return for
cooling
H1 forced defrosting
H2 oil return for
heating or defrosting
H3 Compressor
Overheat Protection
H5 IPM Security
H7 Motor
Desynchronizing
HC PFC Error
Lc startup failure
La dc fan motor
error
Ld phase loss
Le Compressor
Stalling
Lf over speed
P0 IPM Reset
P5 Compressor
Current Protection
P6 communication
error between inverter drive and main controller
P7 radiator
temporary sensor error
P8 Radiator Overheat
Protection
P9 AC Contact
Security
Pc current sensor
error
PD sensor connection
protection
PH over voltage
protection
PL low voltage
protection
PE Floating Drift
Protection
PF drive board
ambient temp sensor error
PA AC Current
Protection
PU charging circuit
error
PP AC input voltage
discrepancy
Comfort Air AC Error Codes
Troubleshooting
Problem: The unit will
not working at all.
reason:
1. Blown fuse or tripped circuit breaker
2. power failure
3. Remote control batteries are low
4. The signal is not being sent by remote control
Solution:
1. Check fuse or circuit breaker. reset circuit breaker or Replace the blown fuse.
2. Wait until power is restored to restart the unit. If you experience brown out condition, contact electrician or your nearest utility.
3. Change the battery. Make sure not to mix different brands / types with old and new batteries.
4. Ensure that you are not using a remote control far away from the control panel of the indoor unit.
reason:
1. Blown fuse or tripped circuit breaker
2. power failure
3. Remote control batteries are low
4. The signal is not being sent by remote control
Solution:
1. Check fuse or circuit breaker. reset circuit breaker or Replace the blown fuse.
2. Wait until power is restored to restart the unit. If you experience brown out condition, contact electrician or your nearest utility.
3. Change the battery. Make sure not to mix different brands / types with old and new batteries.
4. Ensure that you are not using a remote control far away from the control panel of the indoor unit.
Problem: The unit runs and
then immediately shuts down
Reason: Air inlets and / or outlets are blocked
Solution: Remove any obstruction from the air inlets / outlets / clean the air filter, louvre and inlet grill.
Reason: Air inlets and / or outlets are blocked
Solution: Remove any obstruction from the air inlets / outlets / clean the air filter, louvre and inlet grill.
Problem: Abnormal
heating or cooling
reason:
1. Air inlet and / or outlet are blocked
2. improper temperature is set
3. Check fan speed
4. Improper louver adjustment
5. Ensure that there are no other sources of heat / steam in the cooling zone
6. Air-conditioned air can escape
Solution:
1. Remove any obstruction from the air inlets / outlets- clean the air filters, louvers and inlet grills.
2. Ensure that the appropriate mode and temperature is set to the unit. Try adjusting the set point temperature on the thermostat to a better operating temperature
3. Adjust the fan speed to see if the situation improves.
4. Try to adjust the position of the louver to ensure that it is open enough.
5. Remove or turn off other devices that produce heat or steam.
6. Ensure that any doors or windows in the hot / cold area are closed
reason:
1. Air inlet and / or outlet are blocked
2. improper temperature is set
3. Check fan speed
4. Improper louver adjustment
5. Ensure that there are no other sources of heat / steam in the cooling zone
6. Air-conditioned air can escape
Solution:
1. Remove any obstruction from the air inlets / outlets- clean the air filters, louvers and inlet grills.
2. Ensure that the appropriate mode and temperature is set to the unit. Try adjusting the set point temperature on the thermostat to a better operating temperature
3. Adjust the fan speed to see if the situation improves.
4. Try to adjust the position of the louver to ensure that it is open enough.
5. Remove or turn off other devices that produce heat or steam.
6. Ensure that any doors or windows in the hot / cold area are closed
