Viking VUAR140 Troubleshooting Guide download pdf (Page 61)

8 POSITION SELECTOR SWITCH

(With shaft position and internal connections)

SELF CLEAN

Selector Switch closes Heating Element contacts

4-F, 1-N, 2-L2, 3-L2, and Door Lock Module /

Timer contacts J-6 energizing Relay #1.

Thermostat Clean Position closes Thermostat

cycling contacts 1-2 and normally open (N) -

common (C) energizing Relay #3.

Relay # 3 turns on the Clean indicator Light and

energizes Door Lock Module / Timer (PC

Board) relays LS1-L1 and LS2-M1, also

supplying 120VAC to SEL on the PC board

Relays LS1 and LS2 turns the Door Lock Motor

on through the Auto Reset Thermostat contacts

2-1.

Door Lock Motor rotates opening SW1 and

closing SW2 and SW3.

Door Lock Switch #2 completes the circuit to

sensor #3 on the PC board. After 10 seconds

LS1-M1 opens, stopping the Door Lock motion.

Door Lock Switch #3 closes T1-T2 and T3-T4

energizing Power Relay #1 and the Cooling Fan .

Closing Power Relay #1's contacts supplies

240VAC to both Broil Elements and 120VAC to

the Bake Element.

CLEAN DOOR LOCK ABOVE 575*F +/-25*F

Auto Reset Thermostat switches to contacts 1-3

turning on the Door Lock indicator Light and

disables the Door Lock Motor circuit.

CLEAN TEMPERATURE (875*F)

REACHED.

Door Lock Module / Timer opens T3 -T-4 and

T1-T2 turning off the Cooling Fan, now powered

by the Fan Limit Switch when needed, and opens

the circuit to the Power Relay #1 disabling the

Heating Elements.

FINAL BELOW 575*F +/-25*F

Auto Reset Thermostat switches to contacts 1-

2, turning off the Door Lock Motor circuit

through Door Lock Motor / Timer Relay LS2-M-

1. Door Lock Motor operates until 2 seconds

after sensor 4 is signaled by VC that the Door

Lock /Timer switches LS2- M1 and LS1-L1

open and the Timer

reset.

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