Viking VICU206 - Infinite Switch-Radiant Burners

© 2009 Viking Preferred Service
26
Diagnostics
Infinite Switch–Radiant Burners
The purpose of the infinite switch is to control the
cooking operation. Once the end user chooses a
setting, the corresponding amount of power and
cycle rate to deliver a given output is sent to the
appropriate element via switch contacts closing.
To access the infinite switch, remove the knobs,
maintop, and the infinite switch is accessible.
The two different infinite switches are used on the
cooktop. Switch contacts are as follows:
Dual Infinite Switch
Verify 240 VAC between L1 & L2, if no voltage is
present, check wiring and breaker. If 240 VAC is
present check the output from the switch.With the
selector switch in the on position, 120 VAC between
ground and terminal P should be measured. If 120
VAC is not found, verify wiring before replacing the
infinite switch. With the selector switch in the on
position, 240 VAC should be present between
H1a and L2 and H1b and L2. If voltage is not
present, verify wiring, element, and element limiter
before replacing the switch.
Infinite Switch
Verify 240 VAC between L1 & L2, if no voltage is
present, check wiring and breaker. If 240 VAC is
present check the output from the switch. With the
selector switch in the on position, 120 VAC between
terminal P and ground should be measured. If it is
not, verify wiring before replacing switch. With the
selector switch in the on position, 240 VAC should
be measured between terminals H1 and H2. If
240 VAC is not measured, verify wiring, element,
and element limiter before replacing switch.
Note: Refer to wiring schematic for unit being
repaired.
P
L1
H2
L2
H1b
H1a
H1
H2
L2
L1
P