Daikin CTXG09QVJUW Service Manual page 174

Troubleshooting for Outdoor Unit
Troubleshooting
Check No.01
Refer to P.191
Check No.12
Refer to P.194
162
Be sure to turn off the power switch before connecting or disconnecting Be sure to turn off the power switch before connecting or disconnecting
Caution Caution
connectors, or parts may be damaged. connectors, or parts may be damaged.
Any thermistor Any thermistor
disconnected? disconnected?
NO NO
Stop valve closed? Stop valve closed?
NO NO
Check for refrigerant shortage. Check for refrigerant shortage.
Oil leak at relay pipe Oil leak at relay pipe
connections? connections?
NO NO
Oil leak at internal Oil leak at internal
piping? piping?
NO NO
Check No. 12 Check No. 12
Electronic expansion valve Electronic expansion valve
functioning? functioning?
YES YES
Change for a specified amount of Change for a specified amount of
fresh refrigerant. fresh refrigerant.
Refrigerant shortage error Refrigerant shortage error
again? again?
NO NO
YES YES
∗ Discharge pipe thermistor ∗ Discharge pipe thermistor
∗ Indoor or outdoor heat exchanger thermistor ∗ Indoor or outdoor heat exchanger thermistor
∗ Room temperature thermistor ∗ Room temperature thermistor
∗ Outdoor temperature thermistor ∗ Outdoor temperature thermistor
YES YES
YES YES
YES YES
Compressor vibrating Compressor vibrating
too much? too much?
YES YES
NO NO
YES YES
Check No. 01 Check No. 01
Check the thermistors. Check the thermistors.
OK OK
Replace the outdoor unit PCB Replace the outdoor unit PCB
(main PCB). (main PCB).
Error again? Error again?
NO NO
SiUS121630EA
Reconnect the Reconnect the thermistor(s). thermistor(s).
Open the stop valve. Open the stop valve.
Repair the pipe flare or Repair the pipe flare or
replace the union. replace the union.
NO NO
Check if any harnesses are Check if any harnesses are
in contact with the piping in contact with the piping
and correct as required. and correct as required.
Also, replace any cracked Also, replace any cracked
pipes. pipes.
Check the connection of the Check the connection of the
power transistor harness. power transistor harness.
Also, replace any cracked Also, replace any cracked
pipes. pipes.
Replace the electronic Replace the electronic
expansion valve. expansion valve.
NG NG
Replace the defective Replace the defective
thermistor(s). thermistor(s).
YES YES
Replace the compressor. Replace the compressor.
Completed. Completed.
Completed. Completed.
(R23654) (R23654)
Service Diagnosis