LG LRSES2706V /01 Service Manual page 64

Poor cooling in Fresh food section
1
Check the sensor resistance.
CON6 R1SNR
Resistance [Ω]
th th
19 pin~20 pin
23ºF / -5ºC
32ºF / 0ºC
41ºF / 5ºC
50ºF / 10ºC
59ºF / 15ºC
Reset the unit and
2
Input Test1 Mode
(Push the button 1 time)
3
Open the fresh food door and
Check the air flow D amper?
Yes
CON7
38k
30k
24k
19.5k
16k
Check the
No
dampe
Go to 5
4 Check the air temperature.
Is it cold?
Yes
Go to 8
5
Check the Fan Motor voltage
Is Fan Motor voltage 10~12V?
TEST MODE 1
CON8
th th
9 pin ~ 12 pin
Yes
6 Check the Fan Motor voltage
Is Fan PWM voltage 2~4.5V ?
TEST MODE 1
r
CON8
th th
9 pin ~ 19 pin
No
7 Check the Fan Motor voltage
Is Fan Feed Back voltage 0V,5V ?
TEST MODE 1
CON8
th th
9 pin ~ 10 pin
No
8 Explain to customer
64
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reserved. Only training and service purposes.
Check the
Compressor
No
and sealed
system
Replace
No
Main PCB
CON8
Voltage [V]
10~12 VDC
Replace
No
Main PCB
CON8
Voltage [V]
2~4.5 VDC
Change the
Yes
motor
CON8
Voltage [V]
Not 0V, 5V