Viking Quiet Cool VCRB5301, Service Manual

Page: 18 / 47

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 !
DANGER !
Disassembly
18 ©2012 Viking Preferred Service
Power Disconnect Switch
The unit has a rocker switch, located in the
upper right corner of the unit, that allows
power to the unit to be turned “OFF” without
removal of the unit.
1. To access the power disconnect switch,
remove the upper air grill assembly (see
Air Grill Removal section, Page 15). The
power disconnect is now accessible on
the right side.
ON/OFF switch has 120 vac connected
to one side of switch at all times, remove
power with circuit breaker box when
removing switch.
Verify contacts 4-5 open when the switch
is in the “0” position and contacts 4-5 close
when in the “|” position. 120 VAC should be
measured when in the “0” position and 0 VAC
should be measured when in the “|” position.
2. Switch bracket is mounted on electronics
box with two 1/4" hex head screws.
3. Reverse procedure to reinstall.
The Compressor is operated by a Inverter
that varies the voltage to the compressor.
This is determined by the frequency input
from the low voltage board
Inverter
1. To access the inverter, remove upper
air grill assembly, remove control panel
assembly (see Air Grill and Control Panel
Removal sections, Page 15).
2. Remove the control box in order to gain
easy access to the door hinge area for
service. There are 4 ¼” hex screws (2
on each side) holding the control box to
the refrigerator housing. Remove these
screws.
3. Unplug the 15-pin Molex power plug (A),
as well as the 2-wire converter frequency
cable (B) and the 3-wire thermistor plug
(C).
Molex A
Molex
B
Molex C