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R-430BK
R-430BW
R-430BD
When troubleshooting
the microwave oven, it is helpful to follow the sequence of operation in performing the checks.
Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure
letter which will be found in the "Test Procedure" section.
Before replacing a blown monitor fuse, test the door sensing switch, primary interlock relay, sec-
ondary interlock switch and monitor switch for proper operation. (Refer to "Test Procedure" sec-
tion.)
Whenever troubleshooting
is performed, the power supply must be disconnected. In some cases it may be neces-
sary to connect the power supply after the outer case cabinet has been removed. In this event,
1.
2.
3.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulated tape.
6. After the above procedure install the outer case cabinet, reconnect the power supply cord.
Disconnect the power supply cord, and then remove outer case cabinet.
Open the door and block it open.
Discharge the high voltage capacitor.
When the testing is completed
1. Disconnect the power supply cord, and then remove outer case
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Reconnect the leads to the primary of the power transformer.
5. Re-install the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is installed.
7. Run the oven and check all functions.
Troubleshooting Guide
Sensor Cooking Condition
Problem
Possible Cause
Test Procedure
The oven is in the sensor cooking
Control Unit
Procedure G
condition but AH sensor does not end
or AH sensor turns off about a maxi-
mum of 30 minutes after start.
When a cup of water is heated by AH Sensor
sensor, the oven does not shut off
when the water is boiling.
Procedure L
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