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Troubleshooting
SiEN12-710A
140
Service Diagnosis
Troubleshooting
Check No.04
Refer to P.146
Check No.06
Refer to P.149
(R7149)
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
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.
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
Check No. 04
Electronic expansion valve
functioning?
Change for a specified amount of
fresh refrigerant.
Oil oozing at internal piping?
Oil oozing at relay pipe
connections?
Check for gas leakage.
Stop valve closed?
Any thermistor disconnected?
Gas shortage error again?
Check No. 06
Check the thermistors.
Compressor vibrating
too much?
Summary of Contents for 2MKS40FV1B
Page 11: ...Introduction SiEN12 710A x ...
Page 12: ...SiEN12 710A List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Page 17: ...Heat Pump SiEN12 710A 6 List of Functions ...
Page 25: ...Heat Pump SiEN12 710A 14 Specifications ...
Page 111: ...Instruction SiEN12 710A 100 Operation Manual ...
Page 199: ...Wiring Diagrams SiEN12 710A 188 Appendix ...
Page 203: ...SiEN12 710A iv Index ...