Fill Valve Disassembly; Control Board Disassembly - Viking FDB451 Service Manual

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.

Fill Valve Disassembly

In order to access the fill valve, you will
need to lay the unit on its back. Remove the
base pan and moisture sensor. The valve
is secured to the rear frame with two TORX
screws as shown.
Screws
Remove the two screws shown above and
remove the fill valve from the base.
Unplug the white and blue wires from the
coil, and then disconnect the fill tube from
the valve outlet. The fill valve is a 120-volt
valve. The coil is a 1.1K Ω ohm coil and is
controlled from P6-3 (line voltage-blue) and
Neutral on the main terminal block.
©2012 Viking Preferred Service
! WARNING

Control Board Disassembly

The control board is secured to the inner left
support structure of the dishwasher. Please
exercise caution when removing in order to
avoid any damage to the board and its com-
ponents
In order to protect the electronic circuits on
the board and avoid any damage caused by
static discharge, Viking Range Corporation
recommends the use of a ground strap.
Remove the sheet from the tabs and place
aside. The image below (right) shows the
protective sheet removed.
Plastic Protector
Disassembly
! CAUTION
P4 P9
Wiring Harness
Control Board
31