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Troubleshooting
SiEN12-710A
138
Service Diagnosis
Troubleshooting
Check No.07
Refer to P.150
Check No.08
Refer to P.151
Check No.13
Refer to P.153
Note:
If the model does not have SPM, replace the outdoor unit PCB.
(R7148)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
YES
NO
YES
NO
YES
YES
NO
NO
YES
YES
NO
Monitor the supply voltage,
discharge and suction pressures,
and other factors for a long term.
Possible causes
Instantaneous supply voltage
drop
Compressor motor overloaded
Contact-induced electrical
short-circuit
∗
An input over-current may result from wrong internal wiring. If the wires have been disconnected and
reconnected for part replacement, for example, and the system is interrupted by an input over-current,
check the wires again.
Normal?
Error again?
Stop valve fully open?
Voltage as rated?
Any LED off?
Short-
circuit or breakage
between compressor's coil
phases?
Check No. 08
Check the discharge pressure.
Check No. 13
Check the power transistor.
Turn off the power, and reconnect
the harnesses. Turn on the power
again and get restarted.
Turn off the power and turn it on
again to get the system started.
See if the same error occurs.
Check the supply voltage.
Turn off the power and disconnect
the harnesses U, V and W.
Check No. 07
Check the installation condition.
Check with the inverter checker (
∗
).
Keep on using as it is
(monitor).
Check the electricals'
connectors and other
fittings.
Fully open the stop valve.
Correct the power supply.
Replace the compressor.
Correct the power supply or
replace the SPM.
(Replace the outdoor unit
PCB.)
Replace the SPM.
(Replace the outdoor unit
PCB.)
∗
Inverter checker
Part No.: 1225477
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 ...