LG LMXS27626S, Service Manual

Page: 59 / 107

Poor cooling in Fresh food section
1
Check the sensor resistance.
7
Explain to customer
CON7
13
th pin ~ 14 th
pin
Resistance [
Ω]
23ºF / -5ºC 38k
32ºF / 0ºC 30k
41ºF / 5ºC 24k
50ºF / 10ºC 19.5k
59ºF / 15ºC 16k
2 Reset the unit and
Input Test1 Mode
(Push the button 1 time)
3
Open the fresh food door and
Check the air flow Damper?
No
Yes
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]
CON7
8
th
pin ~ 12
th
pin
Not 0V, 5V
5
Check the Fan Motor voltage
Is Fan Motor voltage 8~12V?
Yes
Replace
Main PCB
No
TEST MODE 1
Voltage [V]
CON7
10
th pin ~ 12 th
pin
8~12V
6
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V, 5V?
No
Change the
motor
Yes
Go to 7
-
59
-