Troubleshooting SiBE04-809
110 Service Diagnosis
Troubleshooting
Check No.07
Refer to P.119
Check No.08
Refer to P.120
Check No.13
Refer to P.122
(R7238)
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.
Check No. 08
Check the discharge pressure.
Check No. 13
Check the power transistor.
Check No. 07
Check the installation condition.
Check with the inverter checker (∗).
Turn off the power and disconnect
the harnesses U, V and W.
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.
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 PM1.
(Replace the outdoor unit
PCB.)
Replace the PM1.
(Replace the outdoor unit
PCB.)
Normal?
Error again?
Stop valve fully open?
Voltage as rated?
Any LED off?
∗ Inverter checker
Part No.: 1225477
Short-circuit or
breakage between
compressor's coil
phases?
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