Daikin CTXG09QVJUW Service Manual page 173

SiUS121632EA
Troubleshooting
Check No.01
Refer to P.190
Check No.12
Refer to P.193
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Any thermistor
disconnected?
NO
Stop valve closed?
NO
Check for refrigerant shortage.
Oil leak at relay pipe
connections?
NO
Oil leak at internal
piping?
NO
Check No. 12
Electronic expansion valve
functioning?
YES
Change for a specified amount of
fresh refrigerant.
Refrigerant shortage error
again?
NO
YES
∗ Discharge pipe thermistor
∗ Indoor or outdoor heat exchanger thermistor
∗ Room temperature thermistor
∗ Outdoor temperature thermistor
YES
YES
YES
Compressor vibrating
too much?
YES
NO
YES
Check No. 01
Check the thermistors.
OK
Replace the outdoor unit PCB
(main PCB).
Error again?
NO
Troubleshooting for Outdoor Unit
Reconnect the thermistor(s).
Open the stop valve.
Repair the pipe flare or
replace the union.
NO
Check if any harnesses are
in contact with the piping
and correct as required.
Also, replace any cracked
pipes.
Check the connection of the
power transistor harness.
Also, replace any cracked
pipes.
Replace the electronic
expansion valve.
NG
Replace the defective
thermistor(s).
YES
Replace the compressor.
Completed.
Completed.
(R23654)
161