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Troubleshooting
SiBE12-933_A
204
Service Diagnosis
Troubleshooting
Check No.07
Refer to P.216
Check No.08
Refer to P.217
Check No.13
Refer to P.218
Check No.14
Refer to P.219
(R8463)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Turn off the power and turn it on
again to get the system started.
See if the same error occurs.
Stop valve fully open?
Check No. 13
Check the power transistor.
∗
An input overcurrent 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 overcurrent,
check the wires again.
Error again?
Turn off the power and disconnect
the harnesses U, V and W.
YES
NO
NO
Check with the inverter checker (
∗
).
Any LED off?
YES
NO
YES
Normal?
Turn off the power, and reconnect
the harnesses. Turn on the power
again and get restarted.
Check the supply voltage.
Voltage as rated?
YES
NO
Short-circuit or
breakage between
compressor's coil
phases?
Check No. 08
Check the discharge pressure.
Check No. 07
Check the installation condition.
YES
NO
NO
YES
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
Keep on using as it is
(monitor).
Check the electricals'
connectors and other
fittings.
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
Replace the PM1.
(Replace the outdoor unit
PCB.)
Correct the power supply.
Replace the compressor.
Fully open the stop valve.
Check No. 14
∗
Inverter checker
Part No.: 1225477