Viking VDB325 - Component Diagnosis - Water Valves; Fill Valve and Drain Motor Diagnosis

© 2011 Viking Preferred Service
23
Service Diagnostics and Procedures
Fill Valve
The dishwasher uses a fi ll valve to fi ll the machine
with water. Verify as the valve is energized that
120 VAC is present between P6-3 and P10-1. If
voltage is present and no water enters, check the
water supply and shut off valve to make sure water
is being supplied to the unit. If water is present,
unplug the wires to the fi ll valve and using an
ohmmeter, check for approximately 1.1k їohms at
the coil. If 0 їohms are read, replace the fi ll valve
(see Fill Valve Disassembly procedure, page 45).
Note: Testing the fi ll valve can be achieved in the
diagnostic mode.
Drain Motor
The dishwasher uses a drain motor to remove water
from the tub at timed intervals during the wash
cycle. In the drain mode, voltage between P6-4 and
neutral should be 120 VAC. If voltage is measured,
unplug the wires to the drain motor and using an
ohmmeter, check for approximately 30.6 ї ohms
at the valve. If 0 їohms are read, replace the drain
pump. If readings are correct, remove pump and
check for obstructions in the drain pump (see Drain
Motor Disassembly procedure, page 42).
Note: Testing the drain motor can be achieved in
the diagnostic mode
Main Control Board
Fill Valve
P6-3
P-10
Control Board Diagnosis (continued)
( Some measurements require power and others require the unit not to be powered.)
P6-4
P10-1
Drain Motor
P6-4
P-10
Main Control Board