Samsung AS09HPB Service Manual page 71

Troubleshooting
12-2-12 O.C.(Over Current) error
1. Checklist :
1) Is the Shunt resistance value correct?
2) Is the condition of surrounding temperature abnormal overload?
3) Is there any problem as like the temperature sensor separation or measurement value error?
4) Is the interphase resistance of compressor normal?
2. Troubleshooting procedure
Restart after power off.
Is the O.C.(Over Current) error occurred?
Yes
Is the Shunt resistance value normal?
Yes
Is the interphase resistance value
of compressor(u↔v, v↔w, w↔u) normal?
Yes
Is the compressor body and
interphase resistance insulated?
Yes
Is the condition of
indoor/outdoor temperature normal load?
Yes
Is the position of temperature sensor
and the sensing value normal?
Yes
Is the connection cable for
the compressor and power terminal normal?
Yes
Exchange the PCB.
12-14
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No
No
No
No
No
Yes
No
No
Terminate the service.
Exchange the PCB.
Exchange the Compressor.
Exchange the Compressor.
Restart after returning
to the normal load.
No
Is the O.C. error occurred again?
Correct the sensor position or
exchange the sensor.
Correct the cable connection.
Samsung Electronics
Terminate
the service.