Troubleshooting
SiBE12-908
153
Service Diagnosis
Troubleshooting
Check No.03
Refer to P.170
Check No.14
Refer to P.173
Check No.15
Refer to P.174
Check No.16
Refer to P.175
(R9449)
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Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check that the fault condition
appears whenever turning on the
power supply again after turning it
off.
Is the stop valve
fully opened?
* Output overcurrent may caused by improper wiring inside the unit. If the unit
stops due to output overcurrent after connecting or disconnecting wires to
replace part, check wiring for proper connection.
YES
NO
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
Open the stop valve fully.
Repeated?
YES
NO
Keep on using as it is.
(monitoring)
Check connectors and
other fittings of electric
components.
Turn off the power supply, and
disconnect U, V, and W
harnesses
* Inverter checker
Part No.: 1225477
Check No.15
Check the power transistor
Check No.14
Check the inverter by the
inverter checker*
Is LED turned off?
NO
YES
Is it OK?
YES
NO
Turn off the power supply, replace
the harnesses, and restart the
compressor after turning on the
power supply again.
Check the supply voltage
Rated voltage?
YES
NO
YES
NO
Short-circuit or
breakage between
compressor's coil
phases?
Check No.16
Discharge pressure check
Check No.03
Installation condition check
Rectify the power supply
or replace the outdoor
unit PCB.
Replace the outdoor unit
PCB.
Rectify the power supply.
Replace the compressor.
