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INTERLOCK CONTINUITY TEST
A. PRIMARY INTERLOCK SWITCH TEST | B. SECONDARY INTERLOCK SWITCH TEST |
When the door is opened slowly, an audible click should be heard at the same time or successively at intervals and the latches should activate the switches with an audible click.
If the latches do not activate the switches when the door is closed, the switches should be adjusted in accordance with the adjustment procedure. Disconnect the wire lead from the primary switch. Connect the ohmmeter leads to the common (COM) and normally open (NO) terminal of the switch. The meter should indicate an open circuit in the door open condition.
When the door is closed, the meter should indicate a closed circuit.
When the primary switch operation is abnormal, make the necessary adjustment or replace the switch with the same type of switch.
Disconnect the wire lead from the secondary switch.
Connect the ohmmeter leads to the common (COM) and normally open (NO) terminals of the switch. The meter should indicate an open circuit in the door open condition. When the door is closed, the meter should indicate a closed circuit. When the secondary switch operation is abnormal, make the necessary adjustment or replace the switch only with the same type of switch.
C. MONITOR SWITCH TEST
Disconnect the wire lead from the monitor switch. Connect the ohmmeter leads to the common (COM) and normally closed (NC) terminals of the switch. The meter should indicate a closed circuit in the door open condition. When the door is closed, the meter should indicate an open circuit. When the monitor switch operation is abnormal, replace with the same type of switch.
NOTE: After repairing the door or the interlock system, it is necessary to do this continuity test before operating the oven.
COMPONENTS |
| TEST PROCEDURE | RESULTS |
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SWITCHES | Check for continuity of the | Door | Door | |
(Wire leads removed) | switch with an | open | closed | |
| Primary | NO |
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| Switch | COM |
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| Monitor | NC |
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| Switch | COM |
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| Secondary |
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| Switch | COM |
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| NO |
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| NOTE : After checking for the continuity of switches, make sure that they are | |||
| connected correctly. |
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WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS.
TYPE NO.