LG LTCS20020 Series Service Manual page 35

1) RT Sensor Error
No
Check for loose connection in CON8.
1
2 1.- Unplug connector from CON8.
2.- Check resistance in wires Brown to
Brown.
3.- Plug in CON8, check voltage in wires
Brown to Brown, and check voltage and
temperature result in Table-3)
COLD
w o l f g n i k
35
COLDEST
c e h C
Result
Firmly plugged Go to step 2
Plug firmly then check again.
Problem persist?
Loose
YES: Go to step 2.
NO: Explain to customer.
Result
Short Change the sensor
0
Check the resistance of
the sensor wires back to
Infinte if they are open between
Open
ohms the main PCB and
connector it will be
necessary to replace the
Check the Temp and
Other Normal
resistance (Table-3)
<Temperature table-3>
TEMP
RESISTANCE
-39°F (-40°C)
225.1
-30°F (-35°C)
169.8
-21°F (-30°C)
129.3
-13°F (-25°C)
99.30
-4°F (-20°C)
76.96
5°F (-15°C)
60.13
14°F (-10°C)
47.34
23°F (-5°C)
37.55
32°F (0°C)
30
41°F (+5°C) 24.13
50°F (+10°C) 19.53
59°F (+15°C) 15.91
68°F (+20°C) 13.03
77°F (+25°C) 10.74
86°F (+30°C) 8.89
95°F (+35°C) 7.40
104°F (+40°C) 6.20
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Only training and service purposes.
n o i t c A
SVC Action
SVC Action
the main PCB.
refrigerator
VOLTAGE
4.48 V
4.33 V
4.641 V
4.54 V
4.425 V
4.287 V
4.128 V
3.948 V
3.75 V
3.535 V
3.307 V
3.070V
2.829 V
2.589 V
2.354 V
2.128V
1.914 V
C V