3. Open Door Detection Circuit Check
8-2-5 Temperature Sensor Circuit
The upper CIRCUIT reads REFRIGERATOR temperature, FREEZER Temperature, and DEFROST-SENSOR temperature
for defrosting and the indoor temperature for compensating for the surrounding temperature into MICOM.
OPENING or SHORT state of each TEMPERATURE SENSOR are as follows:
- 30
-
(PIN NO.30 & PIN NO.37)
Closed
5 V
Open
0 V
Freezer/
Refrigerator Door
Measurement
Location
SENSOR
CHECK POINT
NORMAL (-30¡C ~ 50¡C)
SHORT-CIRCUITED
OPEN
Freezer Sensor
POINT Voltage
Refrigerator Sensor
POINT Voltage
0.5 V ~ 4.5 V
0 V
5 V
Defrosting Sensor
POINT Voltage
Room Temperature sensor
POINT Voltage
A
B
C
D
7
7
5
6
1
2
