Water Level Sensor - Viking VDB325 Service Manual

Service Diagnostics and Procedures
Dryer Motor–450 model (cont.)
Remove the inner T-20 TORX® screw.
CAUTION
When reinstalling the air/water inlet assembly,
make sure that both the front and rear brackets
are snapped back into their proper positions
Failure to do so may cause water to leak
through and then onto the consumer's floor.
The O-ring gasket MUST be undamaged
(shown below) or water can leak out of the
unit and cause damage to the unit and the
kitchen area.
© 2011 Viking Preferred Service
Dryer Blower
Screw
O-Ring Gasket

Water Level Sensor

The level sensor is mounted to the sump retainer
ring with a T-25 TORX® screw. Removing the level
sensor DOES NOT require the removal of the
dishwasher from the cabinet. With the toe kick
removed, locate the level sensor shown
Level Sensor
Screw
The image below shows the three wire connector to
the level sensor.
Green WIre Ground In
Brown Wire 5 volts DC in
Yellow Wire
0.5-3.5 volts DC out
As the water level increases, the pressure in the
1/4" (.63 cm) pressure tube, connected to the level
sensor input, increases as well. This pressure causes
an internal amplifier to vary the output voltage
to the board. An empty sump should produce a
reading of .5 - .8 VDC between J9 – 4 and ground
while a full sump should read approximately 3.5
VDC. Depending on the water level, the output
voltage to the control board changes and is
processed in the board.
below.
Sump Connection
52