9
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Troubleshooting
User reference guide
53
FTXM20~4 FTXM20~71R2V1B
Daikin room air conditioner
4P518786-5F – 2020.06
9.1.6 Symptom: A clapping sound is heard
This sound is generated when an external device sucks air out of the room (e.g.
exhaust fan, extractor hood) while the doors and windows in the room are closed.
Open the doors or windows, or turn off the device.
9.1.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)
When the system is changed over to heating operation after defrost operation.
Moisture generated by defrost becomes steam and is exhausted.
9.1.8 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it
again.
9.1.9 Symptom: The outdoor fan rotates while the air conditioner is not in operation
▪
After operation has stopped.
The outdoor fan continues to rotate for another
30 seconds for system protection.
▪
While the air conditioner is not in operation.
When the outdoor temperature is
very high, the outdoor fan starts to rotate for system protection.
9.1.10 Symptom: Indoor unit fan speed does not correspond with the setpoint (during low
ambient cooling operation in Multi system)
▪
During low ambient cooling operation in Multi system, indoor unit may change
fan speed to high regardless of the user setting to defrost the indoor unit heat
exchanger.
9.2 Solving problems based on error codes
Fault diagnosis by user interface
If the unit runs into a problem, you can identify the fault by checking the error
code by the user interface. It is important to understand the problem and take
measures before resetting the error code. This should be done by a licensed
installer or your local dealer.
INFORMATION
See the service manual for:
▪
The complete list of error codes
▪
A more detailed troubleshooting guideline for each error
To check the error code by the user interface
1
Aim the user interface at the unit and press
for about 5 seconds.
Result:
blinks in the temperature setting display section.
2
Aim the user interface at the unit and press
repeatedly until a
continuous beep is heard.
Result:
The code is now displayed on the display.
