3. Door opening sensing circuit
• Since door switches (A) and (B) are interconnected, if either fails, the other will not respond properly.
• If either switch fails, the light will not come on.
Closing 5 V ( A - B , C - D . Switch at both ends are at Off status)
Opening 0 V ( A - B , C - D . Switch at both ends are at On status)
Measuring part
Door of Freezer / Refrigerator
CONNECTOR 7
F- DOOR S/W
2*RD
PIN 5&6
CONNECTOR 9
R- DOOR S/W
BO, PK
PIN 3&4
IC1 (MICOM) PIN 39, 40
- 24 -
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