A. PRIMARY INTERLOCK SWITCH TEST
When the door release button is depressed slowly
with the door closed, an audible
click
should be
heard at the same time or successively at
intervals. When the button is released slowly, 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 a
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 only with the same type of switch.
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 a open circuit in
the door open condition. When the door is closed,
meter should indicate an 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 closed circuit in
the door open condition. When the door is closed,
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.
5-7
WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION
EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS.
COMPONENTS
TEST PROCEDURE
RESULTS
SWITCHES
Check for continuity of the
Door
Door
(Wire leads removed)
switch with an Ohm-meter
open
closed
Primary
Switch
Monitor
Switch
NOTE :
After checking for the continuity of switches, make sure that are
correctly connected.
COM
NO
COM
NC
COM
NO
INTERLOCK CONTINUITY TEST
Secondary
Switch
TYPE NO. KW3A FOR SWITCHS
Type No.KW3A
Type No.KW3A
Type No.KW3A
Summary of Contents for NN-CT641M
Page 9: ...4 3 SCHEMATIC DIAGRAM 15A Ry 1 Ry 2 Ry 3 Ry 4 Ry 5 RY3 RY4 RY5 RY1 RY2 ...
Page 31: ...6 2 DOOR PARTS 1 2 3 5 6 7 8 9 4 ...
Page 32: ...6 3 CONTROL PANEL PARTS 10 11 12 13 ...
Page 33: ...INTERIOR PARTS 6 4 18 19 20 21 22 23 24 25 26 31 32 33 28 30 71 72 65 64 29 27 ...
Page 34: ...6 5 36 LATCH BOARD PARTS 41 34 35 42 37 37 38 39 ...
Page 35: ...6 6 OVEN CAVITY PARTS 44 45 46 47 48 49 50 51 52 R00 43 ...
Page 36: ...6 7 BASE PLATE PARTS 53 54 55 56 57 59 60 61 ...
