21
* Following are explanation of connectors on the Back-up PCB.
Connector
Connects to
Usage
Voltage
S1
Back-up sensor
To detect internal temperature.
S2
#1-#2: Solenoid valve
#3-#4: Power transformer
To supply the power to solenoid valve.
To supply the main power
24V
S3
#1-#2: Test switch
To test back-up system.
S4
Temperature control knob
To set temperature for back-up.
S5
Battery LED
To light LED when low battery.
S6
Temperature control dial
Summary of Contents for MDF-C2156VAN
Page 9: ...6 Dimensions ...
Page 11: ...8 Refrigeration circuits ...
Page 12: ...9 Refrigeration circuit welding points 䌅䌁㩷 䌅䌂㩷 䌅䌃㩷 䌅䌄㩷 䌅䌆㩷 䌅䌇㩷 Pipe layout ...
Page 14: ...11 Components on PCB ...
Page 19: ...16 Wiring Diagram MDF C2156VAN ...
Page 20: ...17 MDF C2156VANC ...
Page 21: ...18 Circuit Diagram ...
Page 22: ...19 CR Circuit Diagram ...