High Voltage Board Check Points
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 earth ground 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
High voltage board input E10 to E9 (Neutral) or ground approximately 115VAC
Compressor/condenser fan motor “ON” = E4 to E9 (Neutral) or ground approximately 115VAC
“OFF” = E4 to E9 (Neutral) or ground
Compressor/condenser fan motor “CLOSED” = R7 to ground approximately -11VDC
relay “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 115VAC
“OFF” = E2 (Neutral) or ground 0VAC
Defrost heater “ON” = E6 to E9 (Neutral) or ground approximately 115VAC
“OFF” = E6 to E9 (Neutral) or ground 0VAC
Defrost heater relay “CLOSED” = R9 to ground approximately -11VDC
“ OPEN” = R9 to ground approximately -25VDC
Defrost terminator “CLOSED” =E5 to E9 (Neutral) ground approximately 115VAC
“OPEN” = E5 to E9 (Neutral) or ground 0VAC
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 fan
Filament voltage at pin 11 and 12 = less than 5VDC
NOTE: DC voltages are read from side of resistor which is closest to the 12 pin connector.
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