4-2-3) When The C-Fan Does Not Operate (Bldc Motor) - Samsung RL60GG Series Service Manual

4. TROUBLESHOOTING

4-2-3) When the C-Fan does not operate (BLDC Motor)

- This refrigerator uses the BLDC Fan Motor. (OPTION)
The BLDC Motor operates with DC 7~12V.
- The F-Fan motor generally runs together with the compressor.
☞ When checking with the Self Diagnosis
C FAN ERROR
7-Segment BAR-TYPE
Upon the initial power on, the compressor
and the C-Fan operate.
But, when there is an instance power
failure, it operates with the operation of
the compressor.
Note
Pulse signals being generated when the motor is rotating are
to be input to CN72 #8 (C). These will be input to MICOM and
when there are no input signals with the motor rotating, the fan
will be turned off and then be turned on in 10 seconds. If there
are still no input signals, it keeps trying the above 4 times. And,
if it still fails, it runs the motor in 10 minutes. It is implemented to
prevent the motor from being overloaded due to restrictions by
foreign substances such as ice built up around the motor.
Start
The Compressor is Off.
Yes
It reads DC7~12
between MAIN PCB
GND and CN72 #8
No
Apply power in 7 minutes after
turning the motor off. (To prevent the
compressor from being overloaded)
Yes
It repeats DC7~12V,
and DC 2V or lower between MAIN PCB GND
and CN72 PIN #8
Yes
◆ Possible Causes
① Defective FAN-MOTOR
② Contact problem at the terminal
(MAIN PCB CONNECTOR-TERMINAL (CN72. ⑦ , ⑧ ,
⑩ ), Contact problem at Freezer Fan Motor Connector,
Defective Motor Wire)
③ Check the motor rotating pulse input upon Fan Motor
operation. (Refer to Fan-Motor Circuit in this manual)
56
No
Run Forced Operation
Yes
FAN operates.
No
Replace MAIN PCB
No