Control; Electronic Thermostat - Viking VGSO100 Service Manual

Control

The operation of the oven is achieved by
input from the control to the thermostat. The
control receives power directly from the line
cord. Power is transferred via a N.C. relay to
the thermostat at P7 black wire.
To access the control, slide the unit out 6 to 8
inches. Remove oven selector and thermostat
knobs, remove screws securing thermostat
and selector bezel, unscrew bezel for oven
light switch, remove button for oven light
switch, remove clock buttons, clock knob,
remove screws securing upper trim piece,
screws securing control panel (two at top and
bottom and two on each side). With the
aid of a flat blade screwdriver, separate the
control panel from the inner control panel.
Remove screws securing control to inner
control panel.
Note: Open oven door, and place oven rack
in highest position, and slide rack out. This
will serve as a support for the control panel
during testing and prevent wires from pulling
loose.
Control should have 120 VAC from terminals
L1 (double black wire) to L2/neutral (double
white wire) and should supply 120 VAC to P7
black of thermostat.
©2012 Viking Preferred Service
Service Procedures

Electronic Thermostat

The thermostat controls the temperature to
the oven based on the input received from
the RTD and thermostat knob based on end
users selection. Once the input is received,
the thermostat will
send 120 VAC via P7 red to the selector
switch to perform the appropriate action.
To access the thermostat, slide the unit out
6 to 8 inches. Remove oven selector and
thermostat knobs, remove screws securing
thermostat and selector bezel, unscrew bezel
for oven light switch, remove clock buttons,
clock knob, remove screws securing upper
trim piece, remove screws securing control
panel (two at top and bottom). Remove
control panel and thermostat is accessible.
Note: Open oven door, and place oven rack
in highest position, and slide rack out. This
will serve as a support for the control panel
during testing and prevent wires from pulling
loose.
The thermostat receives supply power input
at P1, 120 VAC at P7 black, thermostat input
at P6, and oven temperature input at P5. The
thermostat sends output power to the selector
switch via P7 red.
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