Samsung AQV09FC, Service Manual

Page: 68 / 92

Samsung Electronics
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?
Is the Shunt resistance value normal?
Is the interphase resistance value
of compressor (u

v, v

w, w

u) normal?
Is the compressor body and
interphase resistance insulated?
Is the condition of
indoor/outdoor temperature normal load?
Is the position of temperature sensor
and the sensing value normal?
Is the connection cable for
the compressor and power terminal normal?
Exchange the PCB.
Terminate the service.
Exchange the PCB.
Exchange the Compressor.
Exchange the Compressor.
Restart after returning
to the normal load.
Correct the sensor position or
exchange the sensor.
Correct the cable connection.
Is the O.C. error occurred again?
Terminate
the service.
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
No
No
Yes
No
Troubleshooting
12-14