Viking Designer DEDO530T, Service Manual

Page: 52 / 73

Diagnostics
© 2008 Viking Preferred Service
52
Cavity lights
The oven utilizes 120 volt Halogen bulbs to illuminate the oven cavity. The Select Models have one ceiling
mounted light fixture while the premiere models have a ceiling mounted fixture, as well as one on each side of
the oven cavity. The lights are switched on by depressing the touch pad on the control Panel. When the door is
opened during a cook cycle, the lights are also switched on (
Except when the oven is set to the Sabbath Mode ).
Refer to page 10 with regards to enabling and disabling the Sabbath Mode.
When the Main Control Board sends a signal to the relay board(s), the light relay is activated.
FIG A shows
the Light relay energized. The relay sends L1 power through the Yellow wire (P2) on the relay board(s) shown
in
FIG B to the light fixtures in the oven cavities. The Neutral side for the lights in connected to the Neutral
terminal on the main terminal Block. When the Door is opened, the Main Control Board will send a signal to the
relay board for the Light relay to activate.
High Limiter
The oven is protected by a High Temperature Limiter. If you receive the HIGH LIMIT ERROR code, the limiter
has probably tripped or is disconnected. On the Single and Double oven top Cavity, the limiter is located directly
behind the control panel on the left hand side.
FIG A shows the location of the upper limiter. It is normally
closed and will open at 180° F. The 2 gray wires are connected to the relay board at connection P10
as shown in
FIG B .
Continued on page 50
High Limiter
(continued)
Light Relay
K2
Upper Relay Board
To
cavity
lights
P2 P5 P3
P22
To High
limiter
P10
K7 K6 K5 K4 K3 K2 K1