To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING
!
Troubleshooting
38
©2012 Viking Preferred Service
P4
P9
P5
P8
P3
J7
Pin location
Function
Voltage range
Signal
P4-1
Dc supply to
thermistors
4.5 - 5.5 VDC,
ref to P4-12
DC
P4-2
Freezer thermistor
input
0 - 5.5 VDC, ref
to P4-12
DC
P4-3
Refrigerator
thermistor input
0 - 5.5 VDC, ref
to P4-12
DC
P4-4
Provide zero
timing
26 V p-p to 34V
p-p, ref P4-12
See Note 1
below
P4-5
DC Fan enable
17.8 vdc - 38
vdc, ref to
chassis grnd.
DC
P4-6
Defrost
termination
17.8 vdc - 38
vdc, ref to
chassis grnd.
See Note 2
below
P4-7
Evaporator fan
enable
17.8 vdc - 38
vdc, ref to chas-
sis ground
See Note 2
below
P4-8
Compressor
enable
17.8 vdc - 38
vdc, ref to chas-
sis ground
See Note 2
below
P4-9
Defrost termina-
tion signal
25.8 vdc - 38
vdc, ref to chas-
sis grnd
See Note 2
below
P4-10
Door signal
25.8 vdc - 38
vdc, ref to chas-
sis grnd
See Note 2
below
P4-11
PS Reference
0 vdc
DC
P4-12
-30 vdc
22.8 vdc - 38
vdc, ref to chas-
sis ground
See Note 2
below
P4-13
Not used
AC
P4-14
Not used
AC
P4-15
Light enable relay
17.8 vdc - 38
vdc, ref to chas-
sis ground
See Note 2
below
Low Voltage Board
NOTE 1
: Requires an oscilloscope to measure
NOTE 2
:DC voltage- load of meter can affect measurement
Summary of Contents for Quiet Cool VCRB5301
Page 40: ...Schematic 40 2012 Viking Preferred Service 30 All Refrigerator Schematic Upper Section ...
Page 41: ...Schematic 2012 Viking Preferred Service 41 30 All Refrigerator Schematic Lower Section ...
Page 42: ...Schematic 42 2012 Viking Preferred Service 36 All Refrigerator Schematic Upper Section ...
Page 43: ...Schematic 2012 Viking Preferred Service 43 36 All Refrigerator Schematic Lower Section ...
Page 44: ...Wiring Diagrams 44 2012 Viking Preferred Service Wiring 30 All Refrigerator Page 1 ...
Page 45: ...Wiring Diagrams 2012 Viking Preferred Service 45 Wiring 30 All Refrigerator Page 2 ...
Page 46: ...Wiring Diagrams 46 2012 Viking Preferred Service Wiring 36 All Refrigerator Page 1 ...
Page 47: ...Wiring Diagrams 2012 Viking Preferred Service 47 Wiring 36 All Refrigerator Page 2 ...