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Troubleshooting
SiUS04-904
Service Diagnosis
141
Troubleshooting
Check No.04
Refer to P.144
Check No.06
Refer to P.146
(R8525)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
YES
Malfunctioning
NO
NO
YES
YES
YES
NO
Functioning
YES
NO
NO
YES
NO
NO
YES
* Discharge pipe thermistor
* Indoor / outdoor unit heat exchanger thermistor
* Room temperature thermistor
* Outdoor air thermistor
Check for refrigerant leakage.
Change for a specified amount of
fresh refrigerant.
Check No. 04
Electronic expansion valve
functioning?
Replace
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
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.
Malfunctioning
Functioning
Check the CT.
Summary of Contents for FTXS09HVJU
Page 1: ...SiUS04 904 Applied Models Inverter Pair Heat Pump Inverter Pair Wall Mounted Type H Series...
Page 9: ...Safety Considerations SiUS04 904 viii Safety Considerations...
Page 10: ...SiUS04 904 List of Functions 1 Part 1 List of Functions 1 Functions 2...
Page 72: ...Control Specification 15 18 24 Class SiUS04 904 62 Function and Control...
Page 77: ...FTXS09 12HVJU SiUS04 904 66 Operation Manual...
Page 78: ...SiUS04 904 FTXS09 12HVJU Operation Manual 67...
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Page 87: ...FTXS09 12HVJU SiUS04 904 76 Operation Manual 3P232717 1C...
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Page 95: ...FTXS15 18 24HVJU SiUS04 904 84 Operation Manual Do not hit or forcefully push the operation...
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