Monitor Switch Test - Wolf MWD24-2 Service Manual

Troubleshooting Guide
PROCEDURE LETTER
K
#813632 - Revision B - December, 2009
Drawer Microwave

MONITOR SWITCH TEST:

1. Disconnect the power supply cord.
2. Open the drawer and keep it open.
3. To discharge high voltage capacitor, wait for 60 seconds.
4. Before performing this test, make sure that the secondary interlock switch,
according to the above Switch Test Procedure. Disconnect the wire lead from
the monitor switch (COM) terminal. Check the monitor switch operation by
using the ohmmeter as follows. When the drawer is open, the meter should
indicate a closed circuit. When the monitor switch actuator is pushed by a
screw driver through the lower latch hole on the front plate of the oven cavity
with the drawer opened (in this condition the plunger of the monitor switch is
pushed in), the meter should indicate an open circuit. If improper operation is
indicated, the switch may be defective and both the monitor switch, plus fuse
will need to be replaced. After testing the monitor switch, reconnect the wire
lead to the monitor switch (COM) terminal and check the continuity of the
monitor circuit.
5. Reconnect all leads removed from components during testing.
6. Reassemble the unit.
7. Reconnect the power supply cord.
8. Run the oven and check all functions.
Ohmmeter
5-14
(Models MWD24-2 / MWD30-2)
COMPONENT TEST
Monitor Switch
BLK
RED
BRN,GRY
BRN,BLK
Secondary
Interlock Switch
Screwdriver