DOOR INTERLOCK SWITCH ADJUSTMENT (P. 1)
The microwave circuit goes through an interlock switch system of 2 interlock switches and 1 monitor
switch that prevents the generation of microwaves when the upper enclosure is open.
Primary and Secondary Interlock Switches
All of the L1 line voltage for the microwave circuits goes through the primary and secondary switches. The
primary switch will open the circuit when the door is open, thus eliminating the L1 supply to the
transformers. The secondary switch opens the circuit in the event that the primary switch has failed
closed.
Monitor Switch
The monitor switch will send L2 to L1 that is coming from the secondary switch in the event that both the
primary and secondary switches have failed closed, which will create a short circuit and will blow the
microwave fuse and/or the main fuses. This will disable the generation of microwaves.
Note:
In the event that the microwave fuse has blown, then the fuse and all the interlock switches MUST be
replaced (switches may have been damaged from the high current from the short) and reset before
returning operation of the oven to the user.
