Daikin FTKS20D3VMW Service Manual page 249

Troubleshooting
Troubleshooting
Check No.06
Refer to P.279
Note: If the outside 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.
238
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. 06
Indoor unit heat exchanger
thermistor check
Does it conform to
the thermistor characteristic
chart?
NO
YES
YES
YES
YES
SiENBE12-713
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).
(R4695)
Service Diagnosis