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Troubleshooting
SiBE12-933_A
206
Service Diagnosis
Troubleshooting
Check No.04
Refer to P.213
Check No.06
Refer to P.215
(R7149)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check for refrigerant leakage.
Any thermistor
disconnected?
Check No. 04
Electronic expansion valve
functioning?
Stop valve closed?
NO
NO
Oil oozing at relay
pipe connections?
Oil oozing at internal
piping?
Change for a specified amount of
fresh refrigerant.
Refrigerant shortage
error again?
NO
NO
YES
NO
YES
YES
YES
YES
∗
Discharge pipe thermistor
∗
Indoor / outdoor unit heat exchanger thermistor
∗
Room temperature thermistor
∗
Outdoor air thermistor
NO
YES
Compressor
vibrating too much?
NO
YES
Malfunctioning
Check No. 06
Check the thermistors.
Functioning
Replace the room
temperature or outdoor air
thermistor, or the indoor unit
or outdoor unit heat
exchanger thermistor.
Check the power transistor
harness for looseness.
Correct it as required. Also
replace cracked pipe if any.
Check the pipes for
improper contact. Correct
as required. Also replace
cracked pipe if any.
Replace the electronic
expansion valve.
(1) Replace the PCB.
(2) Replace the compressor.
Procedure complete
Repair the pipe flare or
replace the square union.
Open the stop valve.
Replace in position.