LG LFXS30796 Series - Page 65

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Poor cooling in Fresh food section
1
Check the sensor resistance.
8
Explain to customer
CON7
15
th
pin ~ 16
th
pin
Resistance [Ω]
23ºF / -5ºC 38k
32ºF / 0ºC30k
41ºF / 5ºC24k
50ºF / 10ºC 19.5k
59ºF / 15ºC16k
2
Reset the unit and
Input Test1 Mode.
(Push the button 1 time)
3
Open the fresh food door and
Check the air flow. Windy?
No
Yes
Check the R
Fan Motor
Check the
damper
Go to 5
4
Check the air temperature.
Is it cold?
No
Yes
Check the
Compressor
and sealed
system
TEST MODE 1 Voltage [V]
CON6
1
st
pin ~ 5
th
pin
Not 0V, 5V
5
Check the Fan Motor voltage
Is Fan Motor voltage 11.4~12.6V?
Yes
Replace
Main PCB
No
TEST MODE 1 Voltage [V]
CON6
3
rd
pin ~ 5
th
pin
11.4~12.6V
6
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V, 5V?
No
Change the
motor
Yes
TEST MODE 1 Voltage [V]
CON6
34
st
pin ~ 5
th
pin
Not 0V, 5V
7
Check the Fan Motor voltage
Is Fan PWM voltage 0V, 5V?
No
Change the
motor
Yes
Go to 8
CON7