LG LRFD22850ST Service Manual page 32

8-2-8 Temperature Compensation & Overcooling/Undercooling Compensation Circuit
1. Refrigerator Temperature Compensation
Refrigerator
Resistance
(RCR) Compensation
180 KΩ
56 KΩ
33 KΩ
18 KΩ
12 KΩ
10 KΩ
8.2 KΩ
5.6 KΩ
3.3 KΩ
2 KΩ
470 Ω
2. The temperature compensation for refrigerator compartment is in the following table:
Revi s ed resi s tance
470Ω
Present resi s tance
No
470Ω change
0.5°C
2kΩ Down Change
1°C
3.3kΩ Down
1.5°C
5.6kΩ Down
2°C
8.2kΩ Down
Refrigerator 2.5°C
(RCR) 10kΩ Down
3°C
12kΩ Down
3.5°C
18kΩ Down
4°C
33kΩ Down
4.5°C
56kΩ Down
5°C
180kΩ Down
NOTE: This circuit is designed to input the necessary temperature compensation values into the MICOM. This adjusts the
refrigerator temperature, which is different in each model.
Temperature Remark
+2.5°C Compensation by
raising the
+2.0°C
temperature
+1.5°C
+1.0°C
+0.5°C
0 °C Standard Temperature
-0.5°C Compensation by
lowering the
-1.0°C
temperature
-1.5°C
-2.0°C
-2.5°C
2kΩ 3.3kΩ 5.6kΩ
0.5°C 1°C 1.5°C
Up Up Up
No 0.5°C 1°C
Up Up
0.5°C No 0.5°C
Down Change Up
1°C 0.5°C No
Down Down Change
1.5°C 1°C 0.5°
Down Down Down
2°C 1.5°C 1°C
Down Down Down
2.5°C 2°C 1.5°C
Down Down Down
3°C 2.5°C 2°C
Down Down Down
3.5°C 3°C 2.5°C
Down Down Down
4°C 3.5°C 3°C
Down Down Down
4.5°C 4°C 3.5°C
Down Down Down
➧ Table of Temperature Compensation by adjusting the
resistance (difference from the current temperature)
e.g., If the refrigerator compensation resistance
(RCR) is changed from 10K (the current resistance)
to 18K (the adjustment resistance), the temperature
of the refrigerator rises 33.8°F(+1°C).
8.2kΩ 10kΩ 12kΩ
2°C 2.5°C 3°C
Up Up Up
1.5°C 2°C 2.5°C
Up Up Up
1°C 1.5°C 2°C
Up Up Up
0.5°C 1°C 1.5°C
Up Up Up
No 0.5°C 1°C
Change Up Up
0.5°C No 0.5°C
Down Change Up
1°C 0.5°C No
Down Down Change
1.5°C 1°C 0.5°C
Down Down Down Change
2°C 1.5°C 1°C
Down Down Down
2.5°C 2°C 1.5°C
Down Down Down
3°C 2.5°C 2°C
Down Down Down
- 32 -
18kΩ 33kΩ 56kΩ 180kΩ
3.5°C 4°C 4.5°C
Up Up Up
3°C 3.5°C 4°C
Up Up Up
2.5°C 3°C 3.5°C
Up Up Up
2°C 2.5°C 3°C
Up Up Up
1.5°C 2°C 2.5°C
Up Up Up
1°C 1.5°C 2°C
Up Up Up
0.5°C 1°C 1.5°C
Up Up Up
No 0.5°C 1°C
Up Up
0.5°C No 0.5°C
Down Change Up
1°C 0.5°C No
Down Down Change
1.5°C 1°C 0.5°C
Down Down Down Change
5°C
Up
4.5°C
Up
4°C
Up
3.5°C
Up
3°C
Up
2.5°C
Up
2°C
Up
1.5°C
Up
1°C
Up
0.5°C
Up
No