When The Fan Does Now Operate (Ice Room - Fan) - Samsung RF32FMQDBSR/AA Service Manual

TROUBLESHOOTING

4-2-7. When the Fan does now operate (ICE ROOM - FAN)

-This refrigerator uses the BLDC Fan Motor. The BLDC Motor operates with DC 7~12V
-When there is defect, turn on the self-Diagnosis function and confirm the defect
before turning off the unit.
Ice Room Control Temperatture
Ice ON
Ice Off
Note
Pulse signal is generated at CN76 #7 when the Motor spins.
This signal enters to MICOM and if there is no signal
entering when the Motor spins, the Fan goes off and
works again in 10 seconds.
If there is still no signal entering, it repeats the above
operation 4 more times.
If it keeps not sending the signal, the Motor operates in 10
minutes. This is a function to overcome the case that there
is a restriction in the Motor due to foreign substances
around the Motor.
-2.5℃
of the Ice Room good for the Fan to
-14℃
◆ Expected Causes
① Defective Fan-Motor
② Contact error at wire connection
③ When the Fan Motor operates, check the input of
the Motor Spinning Pulse.
☞ How to check the Ice Room-Fan Voltage
- Ice Roon FAN : Voltage between CN76 #6 and GND shall be
DC8~12V.
- After measuring it, check it again if the measurements is
different each other.
95
Start
COMP is running?
Yes
Voltage between MAIN
PCB GND and CN76 #6
is measusred about DC8~12V ?
No
Is the temperature
operate?
Yes
Does the voltage between
MAIN PCB GND and CN76 #6
repeat between DC8~12V
and lower than DC 2V?
Yes
No
Turn on Forced Operation.
Yes
FAN works normal.
No
Operation Temp / Stand-by
No
Replace Main PCB