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SiEN12-710A
Troubleshooting
Service Diagnosis
145
Check No.10
Refer to P.151
NO
(R7153)
YES
NO
YES
YES
NO
NO
YES
Check wrong wiring, insulation
among wiring, insulation to ground
YES
1
NO
(
)
Continued from
the previous
page
Carry out grounding work.
Replace outdoor unit PCB.
Reconnect relay wire.
Replace indoor unit PCB.
The cause seems to be an
external factor other than
failure of the outdoor unit
PCB.
Investigate source of noise
and take measures.
Investigate the cause of
disturbance and take
remedial action.
Check No. 10
Check the power supply
waveform.
Does LED A
flashing more than 10
times?
Turn off the power supply.
Disconnect No. 3 terminal and
turn on the power supply again.
Check relay wire between indoor
unit and outdoor unit.
Does LED A turn off?
Grounded?
Disturbance?
Is it OK?
Check grounding
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 ...