LG LSSB2791ST Service Manual page 48

TROUBLESHOOTING
3. Troubleshooting With Error Display
17) Poor cooling in Refrigerator compartment
No
1
Check the sensor resistance.
※The sensor is determined by the
temperature.
For example, 30㏀ indicates 0℃.
Reset the unit and Input Test 1 Mode.
2
(push the button 1 time)
Open the refrigerator & freezer door and
3
Check the air flow.
Check the air temperature. Cold or not?
4
Check the Fan motor.
5
Rotate fan using your hand.
it feel sticky, change the motor.
(cause of ice or rust inside of motor)
Check the Fan motor voltage.
6
Pin14(2), Pin16(1), Pin18(1) of CON6.
Checking flow Result & SVC Action
(1) To (2)
23℉ / -5℃
32℉ / 0℃
41℉ / 5℃
50℉ / 10℃
59℉ / 15℃
Status
Windy
No windy
Status
Cold
Not cold
Point
Motor
Point
(1)~(2)
(2)~(3)
48
Result
38 ㏀
30 ㏀
24 ㏀
19.5 ㏀
16 ㏀
SVC Action
Go to the 4
Check the Fan
motor(Next page)
SVC Action
Explain to customer
Check the
Compressor And
sealed system
Result
SVC Action
Sticky Change the motor
Result
SVC Action
Below 8V Change the PCB
0 or 5V Change the motor