Procedure For Door Interlock Adjustment And Test - Garland Mealstream Service Manual

PROCEDURE
FOR
The door on the Mealstream oven is monitored by three microswitches. These are used in the
conventional "Primary, Secondary and Monitor" switch arrangement shown below.
The switches operate as follows:
Door Interlock Arrangement
L
1
Power In
L
2
1. Monitor switch ( 14 ,Top left-hand Side ). The Monitor switch will produce
a short circuit across the mains supply if the Primary interlock switch is
faulty, when the door is opened, thus blowing the microwave fuse and
rendering the oven inoperative.
2. Primary Interlock ( 11 , Bottom left-hand ) and Secondary Interlock
( 17 , Bottom right-hand ) Switches. Operate simultaneously.
The Primary switch will cut off the microwave emissions from the oven when
the door is opened by breaking the electrical supply circuit to the
transformers. The Secondary interlock switch will cut off the microwave
emission if the Primary switch have failed.
Note:
If operation of the Monitor switch has caused the Microwave Fuse to blow,
the Primary and Monitor microswitches must be changed, as they may have
been damaged by the high short-circuit currents involved.
DOOR INTERLOCK ADJUSTMENT
Switches shown in Door Closed position
Primary switch 11
Mealstream Ovens Pt. No. 32Z3403 Issue 15
Secondary switch
Monitor switch
Page 27
TEST (1)
AND
17
Power Out
14