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Yes
No
Yes
No
Replace
Replace the
Main PCB
MAIN PWB
Is the connection loose?
Reconnect
Main PCB
Enter the TEST 1 MODE
Is the voltage between
Pins 4 and pin 12 of CON3
like as below?
Is the voltage between
pins 1 and pin 2 of CON4
like as below?
No
Replace the
Main PCB
Feedback check.
Is the voltage between
Pin 2 and pin3 of CON4
like as below?
Pin1 WH
Pin2 BK
Pin12 BK Pin4 BL
Poor cooling in the refrigerator compartment
Yes
Yes
Yes
Voltage of Compressor
Test Point
pin4 to pin12
Result
115 V
Voltage of F-fan
Test Point
pin1 to pin2
Result
12 ~ 16 V
Feedback voltage of F-fan
Test Point
pin2 to pin3
Result
11 ~ 4 V
CON4
CON3
CON3
Pin2 BK
Pin3 PR
CON4