LG LDC22720 - 7-2-5 TEMPERATURE SENSOR CIRCUIT

7-2-5 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:
- 24 -
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
A
B
C
4. Open Door Detection Circuit Check
Closed 5 V
Open 0 V
Freezer/
Refrigerator Door
Measurement
Location
Pin No. 15 (Freezer Door)
Pin No. 14 (Refrigerator Door)