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© 2012 Viking Preferred Service
Service Diagnostics and procedures
Component Testing
The unit has a main control board, a secondary control board and UI (dispenser) board that control functions
of the respective refrigerator/freezer compartment. Components can be diagnosed via these boards. With the
board accessed (refer to main and secondary control boards access procedure, page 52 and control board
access procedure, page 32), the following can be measured:
Component Testing–Control Board
Component
Test point
Reading
Defrost Terminator and Defrost Heater
P3-3 (Brown) – P1-2 (White)
55.7K Ω
Refrigerator Light Switch
P1-1 (Red) – P4-3 (Black)
1M Ω
Freezer Light and NC Freezer Light Switch
P1-1 (Red) – P5-1 (Red/Orange)
24.7 Ω
Defrost Terminator
P3-3 (Brown) – P5-6 (Orange)
55.7K Ω
Damper Motor
P5-5 (Blue/Red) – P1-2 (White)
1.4M Ω
Evaporator Fan
P3-1 (Black/Yellow) – P1-2 (White)
1M Ω
Common Damper Motor
P3-2 (Yellow/Red) – P1-2 (White)
–
Evaporator Fan and Defrost Heater
P3-1 (Black/Yellow) – P3-3 (Brown) Defrost
Thermostat closed
55.8K Ω
Ice Maker
P1-1 (Red) – P1-2 (White)
100M Ω
Water Dispenser Switch
P6-3 (Yellow) – P6-8(Yellow)
20K Ω
Normally Closed Motorized Damper
P5-5 (Blue/Red) – P1-2 (White)
∞ Ω
Fresh Food Thermistor
P6-6 (White/Blue) – P6-1 (White/Orange)
2.38K Ω
Freezer Thermistor
P6-7 (White/Yellow) – P6-1 (White/Orange) 2.38K Ω
Ambient Thermistor
P6-9 (White/Violet) – P6-1 (White/Orange)
2.38K Ω
Freezer Thermistor and Ambient Thermistor
P6-6 (White/Blue) – P6-9 (White/Violet)
4.5K Ω
Condenser Fan Motor and PTC Overload Relay P1-4 (Blue) – P1-2 (White)
3.9 Ω
Condenser Fan Motor and PTC Overload Relay P1-4 (Blue) – P1-2 (White)
3.9 Ω
Common Freezer Light Switch
P5-1 (Red/Orange) – P1-1 (Red)
3.2M Ω
Power Cord (Neutral)
P1-2 (White)
–
Mullion Heater
P7-9 (Blue/White) – P7-10 (Red/Black)
24.5 Ω
Mullion Heater
P7-9 (Blue/White) – P7-10 (Red/Black)
24.5 Ω
+14 VDC Display PC Board
P10-1 (Red/Black) – P10-2 (Black/Green)
5.6K Ω
Wide Display PC Board
P8-2 (Yellow/Black) – P8-3 (Black/Green)
–
Dig Ground PC Board
P8-3 (Black/Green)
–
Compound Ground and Base Pan Ground
Green/Yellow
–
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power to unit using power
switch before servicing. After servicing, reconnect power using power switch.
