6-1
DIAGNOSTICS AND TROUBLESHOOTING
PRIMARY, SECONDARY, AND MONITOR
INTERLOCK SWITCH CHECKOUT PROCEDURE
(+) Continuity (-) No Continuity
NOTE:
These diagrams are not intended to show a complete circuit; they represent the position of switches during “DOOR
OPEN” or “DOOR CLOSED” (continuity checks only).
Door Closed
Door Open
Switch Check By Door Open Door Closed
Primary
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect the wires at the Primary Interlock Switch.
3. Check from the common terminal (black wire) to the normally open terminal
(brown/white wires).
-
+
1. Unplug microwave oven or disconnect power.
2. Disconnect the wires at the Primary Interlock Switch.
3. Check from the common terminal (black wire) to the normally closed terminal
(orange wire).
+
-
Secondary
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect the wires at the Secondary Interlock Switch.
3. Check from the common terminal (blue/black wires) to the normally open
terminal (white/blue wires).
-
+
Monitor
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect the wires at the Monitor Interlock Switch.
3. Check from the common terminal (white wire) to the normally closed terminal
(red wire).
+
-
Monitor
Interlock
Switch
Primary
Interlock
Switch
Secondary
Interlock
Switch
(NC)
(NO)
(NO)
(NC)
(NO)
L
N
Monitor
Interlock
Switch
Primary
Interlock
Switch
Secondary
Interlock
Switch
(NC)
(NO)
(NO)
(NC)
(NO)
L
N
