Poor cooling in Fresh food section
1
Check the sensor resistance.
8
Explain to customer
2
Reset the unit and
Input Test1 Mode
(Push the button 1 time)
3
Open the fresh food door and
Check the air flow D amper?
No
Yes
Check the
dampe
r
Go to 5
4
Check the air temperature.
Is it cold?
No
Yes
Check the
Compressor
and sealed
system
Go to 8
CON
4
R1SNR
1
5
th
pin ~
1
6
th
pin
Resistance [Ω]
23ºF / -5ºC
38k
32ºF / 0ºC
30k
41ºF / 5ºC
24k
50ºF / 10ºC
19.5k
59ºF / 15ºC
16k
TEST MODE 1
Voltage [V]
CON
3
13
th
pin ~ 1
5
th
pin
2~4.5 VDC
5
Check the Fan Motor voltage
Is Fan Motor voltage 10~12V?
Yes
Replace
Main PCB
No
TEST MODE 1
Voltage [V]
CON
3
13
th
pin ~ 1
6
th
pin
10
.8
~1
3.2
VDC
6
Check the Fan Motor voltage
Is Fan PWM voltage 2~4.5V ?
Yes
Replace
Main PCB
No
TEST MODE 1
Voltage [V]
CON
3
13
th
pin ~ 1
4
th
pin
Not 0V, 5V
7
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V,5V ?
No
Change the
motor
Yes
66
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