Daikin FTKS25BVMB Service Manual page 103

Troubleshooting
Troubleshooting
Check No.6
Refer to P.122
Note: If the outdoor air temperature is below –10°C in the cooling mode, the system may get
interrupted with error A5 displayed. The system will be reset itself, but this stop will be put in the
error history memory.
94
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check the air passage.
Is there any
short-circuit?
NO
Check the intake air filter.
Is it very dirty?
NO
Check the dust accumulation on
the indoor unit heat exchanger.
Is it very dirty?
NO
Check No. 6
Indoor unit heat exchanger
thermistor check
Does it conform to
the thermistor characteristic
chart?
NO
YES
YES
YES
YES
SiBE04-302
Provide sufficient air passage.
Clean the air filter.
Clean the heat exchanger.
Replace the indoor unit PCB.
Replace the thermistor
(replace the indoor unit PCB).
(R1401)
Service Diagnosis