Daikin FVXG25K2V1B Service Manual page 128

Troubleshooting
Troubleshooting
Check No.01
Refer to P.121
Check No.12
Refer to P.123
117
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 oozing at relay
pipe connections?
NO
Oil oozing at internal
piping?
NO
Check No. 12
Outdoor 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?
NO
NO
YES
Check No. 01
Check the thermistors.
OK
Replace the outdoor unit PCB.
Error again?
NO
SiBE061121
Replace them in position.
Open the stop valve.
Repair the pipe flare or
replace the union.
YES
Check the power transistor
harness for looseness.
Correct it as required. Also
replace the cracked pipe.
Check the pipes for
improper contact. Correct
them as required. Also
replace the cracked pipe.
Replace the outdoor
electronic expansion valve.
NG
Replace the defective
one(s).
YES
Replace the compressor.
Completed.
Completed.
(R15311)
Service Diagnosis