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Troubleshooting
SiEN12-710A
144
Service Diagnosis
Troubleshooting
YES
(R7152)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check indoor unit also, because a comunication circuit fault
may be caused by the problem related to the indoor unit.
NO
NO
NO
NO
YES
YES
NO
YES
Wait more than 10 sec.
YES
Continued to the next page
1
YES
NO
Check supply voltage
Power on again
Check terminal board connecting
wire for proper connection
Is it damaged?
Does it have conductivity?
Does it have conductivity?
5 V±0.5 V
Rated voltage?
Firmly connected?
Check varistor (V1) on the
outdoor unit PCB
Check fuse (FU1) on the outdoor
unit PCB
Check thermal fuse on the
terminal board
Check +5V and GND on the
outdoor unit PCB
Rectify the power supply.
Replace the varistor.
Replace the fuse.
Replace outdoor unit PCB.
Replace thermal fuse on
the terminal board.
Reconnect properly.
Replace terminal board.
Replace thermal fuse on
the terminal board.
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 ...