Troubleshooting SiENBE05-722_A
100 Service Diagnosis
Troubleshooting
Check No.04
Refer to P.103
Check No.06
Refer to P.105
(R12015)
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. 04
Electronic expansion valve
functioning?
Replace them in position.
Open the stop valve.
Repair the pipe flare or
replace the union.
Check the pipes for
improper contact. Correct
them as required. Also
replace the cracked pipe.
Replace the electronic
expansion valve.
Replace the defective
one(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. 06
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?
Check the power transistor
harness for looseness.
Correct it as required. Also
replace the cracked pipe.
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