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Troubleshooting
Si12-619A
252
Service Diagnosis
Troubleshooting
Check No.07
Refer to P.264
Check No.08
Refer to P.265
Check No.13
Refer to P.267
Note:
If the model does not have SPM or PM1, replace the outdoor unit PCB.
Fully open the stop valve.
Keep on using as it is
(monitor).
Check the electricals'
connectors and other
fittings.
∗
Inverter checker
Part No.: 1225477
Correct the power supply or
replace the SPM or PM1.
(Replace the outdoor unit
PCB.)
Replace the SPM or PM1.
(Replace the outdoor unit
PCB.)
Correct the power supply.
Replace the compressor.
(R4705)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Stop valve fully open?
NO
YES
∗
An output 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 output over-current,
take the following procedure.
Error again?
NO
YES
NO
YES
Voltage as rated?
YES
NO
Short-circuit
or breakage between
compressor's coil
phases?
NO
YES
Normal?
YES
NO
Any LED off?
Turn off the power and turn it on
again to get the system started.
See if the same error occurs.
Turn off the power and disconnect
the harnesses U, V and W.
Monitor the supply voltage,
discharge and suction pressures,
and other factors for a long term.
Possible causes
z
Instantaneous supply voltage
drop
z
Compressor motor overloaded
z
Contact-induced electrical short-
circuit
Check with the inverter checker (
∗
).
Turn off the power, and reconnect
the harnesses. Turn on the power
again and get restarted.
Check the supply voltage.
C
heck No.
13
Check the power transistor.
C
heck No.
08
Check the discharge pressure.
C
heck No.
07
Check the installation condition.
Summary of Contents for 3MKS50DVM
Page 13: ...Introduction Si12 619A xii ...
Page 131: ...Control Specification Si12 619A 118 Function and Control ...
Page 213: ...Instruction Si12 619A 200 Operation Manual ...
Page 283: ...Check Si12 619A 270 Service Diagnosis ...
Page 302: ...Si12 619A Outdoor Unit E Series 50 52 58 Class Removal Procedure 289 Step Procedure Points ...
Page 385: ...Wiring Diagrams Si12 619A 372 Appendix FTK X S50 60 71FVLT ...
Page 399: ...Si12 619A vi Index ...