LG LFCS31626 Series Service Manual page 47

Poor cooling in Fresh food section
1
Check the sensor resistance.
CON7
CON7
Resistance [Ω]
15 th pin ~ 16 th pin
23ºF / -5ºC
32ºF / 0ºC
41ºF / 5ºC
50ºF / 10ºC
59ºF / 15ºC
2 Reset the unit and
Input Test1 Mode.
(Push the button 1 time)
3
Open the f resh f ood door and
Check the air f low. Windy?
Yes
38k
30k
24k
19.5k
16k
Check the R
Fan Motor
No
Check the
damper
Go to 5
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4
Check the air temperature.
Is it cold?
Yes
Go to 7
5
Check the Fan Motor voltage
Is Fan Motor voltage 8~12V?
TEST MODE 1
CON6
3 rd pin ~ 5 th pin
Yes
6
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V, 5V?
TEST MODE 1
CON6
1 st pin ~ 5 th pin
No
7
Explain to customer
Check the
Compressor
No
and sealed
system
Replace
No
Main PCB
Voltage [V]
8~12V
Change the
Yes
motor
Voltage [V]
Not 0V, 5V