Samsung RF31FM Series Manual page 179

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6. Self Diagnosis & Trouble Shooting
6-2. IF FAN does not operate
NO
Recheck after 7 minutes
(Time could be delayed
depending on the
temperatures. If the
temperature is lower, It
may not operate : about
59℉ (below 15℃)
For C-FAN
Does DC7~12V
alternate with below DC
2V between MAIN PCB
Ground J23 JUMMPER
and CN76 "5"(Sky-blue)
YES
YES
Door & MICOM State
R MICOM(#28)
F MICOM
Door
(#29)
Right and Left
Close 5V(High) 0V(Low)
Open 0V(Low) 5V(High)
For R-FAN
Does DC7~12V
alternate with below DC
2V between MAIN PCB
Ground J23 JUMMPER
and CN76 "4"(Orange)
YES
YES
Power ON with 7 minutes
delay after power OFF.
For preventing the over
load of compressor)
For F-FAN
Does DC7~12V alternate
with below DC 2V
between MAIN PCB
Ground J23 JUMMPER
and CN76 "3"(Yellow)
YES
◆ Expected causes
① Check that if FAN-MOTOR has failure itself.
② Check that if wiring connection has bad contact.
③ Check the input of the fan motor rotation pulse
when motor fan operates.
To do list
In initial power to appliance, the
compressor and fans of fresh food/
freezer, compressor fan operate. If
freezer temperature is sensed
of 41℉ by momentary power failure,
fans will operate after 7 minutes.
NO
Replace MAIN PCB Ground
179