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