Samsung RF4287HARS, Service Manual, Page: 81 / 132

82
TROUBLESHOOTING
- This refrigerator has BLDC FAN motor. BLDC motor is driven by DC10~12V
- When COMP ON, normally with F-FAN motor.
4-2-4. If FAN does not operate(Flex Room - FAN)
Start
Execute manual operation
No
Yes
Yes
No
Yes
Yes
No
No
Is COMPRESSOR ON ?
Is the Flex
Room temperature suitable for
the Fan working?
◆
Predicted Cause
① FAN-MOTOR troubles itself
②
Bad wiring connections.
③ Wrong Input of the fan motor rotation pulse
Is the voltage between
CN79-"1"(Orange) and "3"(Blue)
(Black) around DC10~12V?
Does DC7~12V alternate
with below DC2V between CN79-
"1"(Orange) and "3"(Blue)
FAN works normally
Operation
temperature/ready
Replace MAIN PCB
Flex Room control temperature
Sort
Micom
(IC01)
Initial
power On
Heater
off
Working
heater
37
℉
(3 ℃ )
42
℉
(6 ℃ )
27
℉
(-3 ℃ )
32
℉
(0 ℃)
Temperaure
☞ Checking method of Flex Zoon FAN Motor Voltage with the voltage
between CN79-"1"(Orange) and "3"(Blue) shall be less than DC10~12V
- Additional check if resistance values are different after measurement.
1) Flex Room - FAN
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