SiBE061121_A
Troubleshooting
Service Diagnosis
73
Troubleshooting
Check No.01
Refer to P.106
Check No.12
Refer to P.108
(R18178)
Caution
YES
NG
NO
NO
YES
YES
YES
NO
YES
NO
NO
YES
NO
NO
YES
∗
Discharge pipe thermistor
∗
Indoor or outdoor heat exchanger thermistor
∗
Room temperature thermistor
∗
Outdoor temperature thermistor
Check for refrigerant shortage.
Change for a specified amount of
fresh refrigerant.
Check No. 12
Outdoor electronic
expansion valve
functioning?
Replace the thermistor(s)
in
position.
Open the stop valve.
Repair the pipe flare or
replace the union.
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 outdoor
electronic expansion valve.
Replace the defective
thermistor(s).
Completed.
Refrigerant shortage error
again?
Oil oozing at internal
piping?
Stop valve closed?
Compressor vibrating
too much?
Oil oozing at relay
pipe connections?
Any thermistor
disconnected?
Check No. 01
Check the thermistors.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
OK
NO
YES
Replace the outdoor unit PCB.
Replace the compressor.
Completed.
Error again?
