Daikin FTX20JV1B Service Manual page 69

SiBE041010EA
Troubleshooting
Check No.01
Refer to P.85
Check No.12
Refer to P.87
Check for refrigerant shortage.
Change for a specified amount of
fresh refrigerant.
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
Oil oozing at relay
pipe connections?
NO
Oil oozing at internal
piping?
NO
Check No. 12
Electronic expansion valve
functioning?
YES
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
Troubleshooting
Replace the thermistor(s)
position.
Open the stop valve.
Repair the pipe flare or
replace the union.
YES
Check the power transistor
harness for loosening.
Correct it as required. Also
replace the cracked pipe.
Check the pipes for
improper contact and
correct them as required.
Replace the cracked pipe.
Replace the electronic
expansion valve.
NG
Replace the defective
thermistor(s).
YES
Replace the compressor.
Completed.
Completed.
(R18930)
in
58