Samsung RB37A5290SA - Инструкция по эксплуатации - Страница 66

66

4. TROUBLESHOOTING

◆Reference : Pulse signal that occurs when motor is spinning 
is input at CN75 PIN #6. 
This signal is input at MICOM and when the signal is not input 
when motor is running, turn off the fan and turn it back on 
after 10 seconds. 
If the signal still does not turn on, then repeat the process 
above 4 more times.  
If the signal still does not turn on, restart the motor after 10 
minutes. 
This function is applied in case the motor restriction is caused 
by ice or any other foreign substances around the motor.

4-2-3) When the refrigerator(R) FAN does not work (restricted to R-FAN applied models only)

-  This refrigerator uses BLDC FAN motor. 

BLDC motor operates by DC 7~12V.

- Generally, under COMP ON condition, FAN motor operates together.

☞

 Content to be displayed when checking the self-diagnosis function

Is COMP OFF?

Is the voltage DC 7~12V 

between the MAIN PCB's GND and 

CN75 PIN #3?

Does the voltage fluctuate from 

DC 7 to 12V between the MAIN PCP's GND and 

CN75 PIN #3, and DC 2V or lower between #6 PIN 

repeatedly?

Start

Operate forced operation

FAN working properly

Replace the MAIN PCB

Yes

Yes

No

No

Yes

Yes

When first impressing the voltage the 
compressor and FAN work, but they start 
operating in 7 minutes after detecting the 
temperature (below 10℃ in compartment 
F, compartment F defrosting) due to 
temporary power cut.

Turn the power off and after about 7 

minutes, turn on the power.

◆ Expected cause
① Faulty FAN-MOTOR
②  Check if there's faulty connection between wires. 

(MAIN PCB CONNECTOR - TERMINAL part (CN75.①,
③,⑥) refrigerator FAN MONTOR connecting part's faulty 
contact, faulty MOTOR connecting WIRE)

③  Check motor spinning pulse input during fan motor 

operation 
(Please refer to this manual's FAN-MOTOR driving 
circuit part)

No

No