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9-2. Interlock Continuity Test
A. PRIMARY 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.
If the primary switch operation is abnormal,
make the necessary adjustment or replace the
switch, making sure to replace it with the same
type of switch.
COMPONENTS
SWITCHES
(Wire leads removed)
WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION
EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS.
TYPE NO.SZM-V16-FA-63 OR VP-533A-OF OR V-5230Q FOR PRIMARY SWITCH
TYPE NO.SZM-V16-FA-62 OR VP-532A-OF OR V-5220Q FOR MONITOR SWITCH
TYPE NO.SZM-V16-FA-63 OR VP-533A-OF OR V-5230Q FOR SECONDARY SWITCH
TEST PROCEDURE
Check for continuity of the
switch with an ohmmeter
Primary
COM
COM
COM
Switch
COM
COM
Monitor
COM
NO
COM
Switch
COM
COM
Secondary
NC
COM
COM
Switch
COM
COM
COM
COM
NOTE : After checking for the continuity of the switches, make sure that they are
connected correctly.
COM
NO
COM
COM
B. SECONDARY INTERLOCK SWITCH TEST
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. If the
secondary switch operation is abnormal, make the
necessary adjustment or replace the switch, making
sure to replace it 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. If the door is closed, the
meter should indicate an open circuit. If the monitor
switch operation is abnormal, replace it 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.
NO
NO
NO
NO
NO
NC
NC
NC
NC
NC
NO
COM
COM
COM
NC
NO
NO
NO
NO
COM
NO
NO
NO
COM
COM
NC
NC
COM
NO
COM
NO
NO
COM
-29-
RESULTS
Door
Door
open
closed
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