Troubleshooting
SiBE12-908
146
Service Diagnosis
Troubleshooting
Check No.03
Refer to P.163
Check No.14
Refer to P.166
Check No.15
Refer to P.167
Check No.16
Refer to P.168
YES
YES
Open the stop valve fully.
Keep on using as it is.
(monitoring)
Check connectors and
other fittings of electric
components.
*Inverter checker
Part No.: 1225477
Rectify the power supply or
replace the outdoor unit
PCB.
Replace the outdoor unit
PCB.
Rectify the power supply.
Replace the compressor.
Is there any LED
turned off?
(R9449)
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the stop valve
fully opened?
Check that the fault condition
appears whenever turning on the
power supply again after turning
it off.
Repeated?
NO
YES
NO
YES
NO
Turn off the power supply, and
disconnect U, V, and W
harnesses
Turn off the power supply, replace
the harnesses, and restart the
compressor after turning on the
power supply again.
Check the supply voltage
NO
YES
*Output overcurrent may caused by improper wiring inside the machine. If the
machine stops due to output overcurrent after connecting or disconnecting wires
to replace part, check wiring for proper connection.
Check No.15
Check the power transistor
Check No.14
Check the inverter by the
inverter checker*
Check No.16
Discharge pressure check
Is it OK?
Rated voltage?
Short-circuit or
breakage between
compressor's coil
phases?
NO
YES
Check No.03
Installation condition check
Monitor the supply voltage,
discharge and suction
pressures, and other factors for
a long term.
Possible causes
· Momentary supply voltage drop
· Compressor motor overloaded
· Short circuit
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