Daikin CTXU25G2V1B Service Manual page 166

Troubleshooting
Troubleshooting
Check No.02
Refer to P.169
Check No.17
Refer to P.176
155
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
Is the stop
valve opened?
YES
Check refrigerant leakage.
Oil oozing at relay pipe
connections?
NO
Oil oozing at
internal piping?
NO
Check No.17
Check electronic expansion
valve?
YES
Does refrigerant
heat exchange drift
occur?
NO
Replace with the specified
quantity of refrigerant
Is refrigerant
shortage fault
repeated?
NO
NO
YES
YES
Compressor
vibrates too much?
NO
NO
YES
YES
Check No.02
Thermistor check
YES
Replace the outdoor unit PCB
Is refrigerant
shortage fault
repeated?
NO
SiBE12-908
Open the stop valve.
Repair flared portion of
piping or replace square
union.
Check the power transistor
YES
harness for looseness.
Correct it as required.
Replace cracked pipe if
any.
Check the piping for
improper contact. Correct
as required.
Replace cracked pipe if
any.
Replace the electronic
expansion valve.
Replace the heat
exchanger.
NO
Replace the defective
thermistor. (room
temperature, outdoor air,
indoor or outdoor heat
exchanger thermistor)
YES
Replace the compressor.
Procedure complete.
Procedure complete.
(R9450)
Service Diagnosis