Viking VUAR140 Troubleshooting Guide download pdf (Page 67)

Electronic Function Description ---VCBB Bottom Freezer - Refrigerator

WARNING

To avoid electrical shock which can cause severe personal injury or death, disconnect power to

refrigerator using power switch before servicing. Wires removed during disassembly must be replaced

on proper terminals to insure correct earthing and polarization. After servicing, reconnect power using

power switch.

Refrigeration and Defrost Component Checks Made at High Voltage Board

Low voltage board input W1 to D11 approximately -25VDC

E10 to E9 (Neutral) or ground approximately 120VDC

Compressor/condenser fan motor “ON” = E4 to E9 (Neutral) or ground approximately 120VDC

“OFF” = E4 to E9 (Neutral) or ground

Compressor/condenser fan motor relay “CLOSED” = R7 to ground approximately -11VDC

“OPEN” = R7 to ground approximately -25VDC

Evaporator fan motor relay “CLOSED” = R8 to ground approximately -11VDC

“OPEN” = R8 to ground approximately -25VDC

Evaporator fan motor “ON” =E2 (Neutral) or ground approximately 120VDC

“OFF” = E2 (Neutral) or ground 0VDC

Defrost heater “ON” = E6 to E9 (Neutral) or ground approximately 120VDC

“OFF” = E6 to E9 (Neutral) or ground 0VDC

Defrost heater relay “CLOSED” = R9 to ground approximately -11VDC

“ OPEN” = R9 to ground approximately -25VDC

Defrost terminator “CLOSED” =E5 to E9 (Neutral) ground approximately 120VDC

“OPEN” = E5 to E9 (Neutral) or ground 0VDC

DC fan output voltage from “ON’ = E1 to ground approximately -25VDC

high voltage board to fresh food fan “OFF” = E1 to ground 0VDC

or condensate evaporator fan

DC fan input voltage “ON” =R10 to ground approximately -11VDC

signal to high voltage board from “OFF” = R10 to ground approximately -25VDC

low voltage board for fresh food

fan and for condensate evaporator

Filament voltage at pin 11 and 12 = less than 5VDC

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Viking VUAR140 Troubleshooting Guide Page 67