Daikin SUPER MULTI NX G Series Service Manual page 154

Troubleshooting
Troubleshooting
24/32 class
Check No.04
Refer to P.150
Check No.06
Refer to P.152
145
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. 04
Electronic expansion valve
functioning?
YES
Change for a specified amount of
fresh refrigerant.
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
SiUS12-928_A
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.
(R12027)
Service Diagnosis