Troubleshooting SiENBE04-507A
142 Service Diagnosis
Troubleshooting
Check No.4
Refer to P.144
Check No.6
Refer to P.146
Reconnect in position.
Open the stop valve.
Repair the pipe flare or
replace the square union.
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.
Replace the room
temperature or outdoor air
thermistor, or the indoor
unit or outdoor unit heat
exchanger thermistor.
(1) Replace the PCB.
(2)
Replace the compressor.
Procedure complete
(R3318)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Any thermistor
disconnected?
YES
Stop valve closed?
Gas shortage error again?
Check No. 6
Check the thermistors.
Oil oozing at internal piping?
Check No. 4
Electronic expansion valve
functioning?
Oil oozing at relay pipe
connections?
Check for gas leakage.
Change for a specified amount of
fresh refrigerant.
Compressor vibrating
too much?
* Discharge pipe thermistor
* Indoor / outdoor unit heat exchanger thermistor
* Room temperature thermistor
* Outdoor air thermistor
Functioning
NO
YES
Malfunctioning
NO
NO
YES
YES
NO
YES
YES
YES
NO
NO
NO
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