LG LMXS27626S Service Manual page 59

Poor cooling in Fresh food section
1
Check the sensor resistance.
CON7
13 pin ~ 14
th 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 fresh food door and
Check the air flow Damper?
Yes
Resistance [Ω]
38k
30k
24k
19.5k
16k
Check the
damper
No
Go to 5
4
Check the air temperature.
Is it cold?
Go to 7
5
Check the Fan Motor voltage
Is Fan Motor voltage 8~12V?
TEST MODE 1
CON7
10 th pin ~ 12
pin
6
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V, 5V?
TEST MODE 1
CON7
8 pin ~ 12
th th
7
Explain to customer
- 59 -
No
Yes
No
Voltage [V]
th
8~12V
Yes
Yes
Voltage [V]
Not 0V, 5V
pin
No
Check the
Compressor
and sealed
system
Replace
Main PCB
Change the
motor