Midea EM048K6DMP Service Manual page 16

Test Procedures
Procedure
Letter
H MONITOR SWITCH TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Before performing this test, make sure that the secondary interlock switch and the primary
interlock relay are operating properly, according to the 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 door is open, the meter should indicate a closed
circuit. When the monitor switch actuator is pushed by a screwdriver through the lower latch
hole on the front plate of the oven cavity with the door 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. After testing the monitor switch, reconnect
wire lead to monitor switch (COM) terminal and check continuity of monitor circuit.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
HOOD THERMAL CUT-OUT TEST
J
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. A continuity check across the thermal cut-out terminals should indicate an open circuit unless the
temperature of the thermal cut-out reaches approximately 158°F (70°C) or more. At that
temperature, the contacts will close. The thermal cut-out opens automatically at approximately
104°F (40°C).
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
Component Test
Screwdriver
Door
Sensing Switch
14
Monitor Switch
Ohmmeter