Diagnostics And Troubleshooting; Primary, Secondary And Monitor Interlock Switch Checkout Procedure - Whirlpool MH3184XPB Service Manual

DIAGNOSTICS AND TROUBLESHOOTING

PRIMARY, SECONDARY, AND MONITOR
INTERLOCK SWITCH CHECKOUT PROCEDURE
Switch Check By
Primary 1. Unplug microwave oven or disconnect power.
Interlock
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 1. Unplug microwave oven or disconnect power.
Interlock
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 1. Unplug microwave oven or disconnect power.
Interlock
2. Disconnect the wires at the Monitor Interlock Switch.
3. Check from the common terminal (white wire) to the normally closed terminal
(red wire).
(+) 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
L
(NC) (NO)
(NO)
Primary Monitor
Interlock Interlock
Switch
(NC) (NO)
Secondary
Interlock
Switch
Switch
Door Open
L
N
(NC)
(NO)
Primary
Interlock
Switch
6-1
Door Open Door Closed
-
+
-
+
(NO)
(NC) (NO)
Monitor
Secondary
Interlock
Interlock
Switch
Switch
+
-
+
-
N