Samsung AS09BPA, Service Manual

Page: 71 / 96

Troubleshooting
Samsung Electronics 12-14
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
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Restart after power off.
No
Is the O.C.(Over Current) error occurred? Terminate the service.
No
Is the Shunt resistance value normal? Exchange the PCB.
No
Is the interphase resistance value
of compressor(u
↔
v, v
↔
w, w
↔
u) normal?
Exchange the Compressor.
No
No Yes
Is the compressor body and
interphase resistance insulated?
Exchange the Compressor.
No
Is the connection cable for
the compressor and power terminal normal?
Exchange the PCB.
Correct the cable connection.
No
Is the position of temperature sensor
and the sensing value normal?
Correct the sensor position or
exchange the sensor.
No
Is the condition of
indoor/outdoor temperature normal load?
Restart after returning
to the normal load.
Is the O.C. error occurred again?
Terminate
the service.
24437A(1)_1 1/16/05 9:58 PM Page 12-14