3. Open Door Detection Circuit Check
8-2-3 Temperature Sensor Circuit
• The resistance of the SENSOR has a ±5% common difference.
• Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature.
This delay is necessary due to sensor response speed.
Closed
5 V
Open
0 V
Freezer/
Refrigerator Door
Measurement
Location
Pin 10 & 11 of con4 Ref.Door
Pin 5 & 6 of con6 Fre.Door
TEMPERATURE
RESISTANCE OF FREEZER/Icing
RESISTANCE OF REFRIGERATOR &
SENSOR
DEFROST SENSOR & ROOM SENSOR
- 20 ºC (-4 °F)
22.3 K?
77 K?
- 15 °C (5°F)
16.9 K ?
60 K?
- 10 °C (14 °F)
13.0 K?
47.3 K?
- 5 °C (23 °F)
10.1 K?
38.4 K?
0 °C (32 °F)
7.8 K?
30 K?
+ 5 °C (41 °F)
6.2 K?
24.1 K?
+ 10 °C (50 °F)
4.9 K?
19.5 K?
+ 15 °C (59 °F)
3.9 K?
15.9 K?
+ 20 °C (68 °F)
3.1 K?
13 K?
+ 25 °C (77 °F)
2.5 K?
11 K?
+ 30 °C (86 °F)
2.0 K?
8.9 K?
+ 40 °C (104 °F)
1.4 K?
6.2 K?
+ 50 °C (122 °F)
0.8 K?
4.3 K?
“LOCATED ON DISPLAY PCB”
- 40 -
PIN
1
2
3
4
5
6
7
8
9
10
11
V
G
F
V
G
F
V
G
F
CONNECTOR 4
F-FAN
ICING-FAN
C-FAN
R-DOOR S/W
PIN
1
2
3
4
5
6
7
8
9
10
11
12
F-SNR
CONNECTOR 6
Stepping Motor
F-Door S/W
D-SNR
R-SNR
PIN
1
2
3
4
5
6
12V GND RXD TXD
CONNECTOR 4
DISPLAY
RT-
SENSOR
PIN
1
2
3
4
5
6
7
8
9
10
11
12
F-SNR
CONNECTOR 6
Stepping Motor
F-Door S/W
D-SNR
R-SNR
