Daikin ARK25BVMB, Service Manual

Page: 125 / 201

Troubleshooting SiBE04-302
116 Service Diagnosis
Troubleshooting
Check No.4
Refer to P.120
Check No.6
Refer to P.122
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.
CT in trouble (refer to H8).
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
(R2853)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Any thermistor
disconnected?
YES
Malfunctioning
Malfunctioning
NO
Functioning
Stop valve closed?
NO
YES
Check the CT.
YES
NO
Gas shortage error again?
Functioning
Check No. 6
Check the thermistors.
YES
NO
Oil oozing at internal piping?
NO
YES
Check No. 4
Electronic expansion valve
functioning?
YES
NO
Oil oozing at relay pipe
connections?
Check for gas leakage.
Change for a specified amount of
fresh refrigerant.
NO
YES
Compressor vibrating
too much?
* Discharge pipe thermistor
* Indoor / outdoor unit heat exchanger thermistor
* Room temperature thermistor
* Outdoor air thermistor