Daikin FTXS20G2V1B Service Manual page 154

SiENBE04-808_A
Troubleshooting
Check No.04
Refer to P.146
Check No.06
Refer to P.148
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. 04
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. 06
Check the thermistors.
OK
Replace the outdoor unit PCB.
Error again?
NO
Troubleshooting
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 electronic
expansion valve.
NG
Replace the defective
one(s).
YES
Replace the compressor.
Completed.
Completed.
(R12015)
142