Left And Right Door Switch Assemblies - GE Advantium 240 Technical Service Manual

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Left and Right Door Switch Assemblies

The primary interlock, monitor interlock, and door
sensing (secondary interlock) switches function
together as an interlock system. The primary
purpose of the interlock system is to interrupt
the production of microwave energy when the
oven door is opened, and similarly, to prevent any
microwave output until the door is fi rmly and safely
closed.
When the door is opened, fi rst the primary switch
opens its contacts. Second, the door sensing switch
opens. Finally, the monitor interlock switch closes
its contacts. If any of the switches fail to open their
contacts properly when the door is opened, a short
circuit is created when the monitor interlock switch
closes its contacts and the noise fi lter fuse will open.
If the door sensing switch is open, the display
Note:
will tell the user to "close the door" – user can
program the unit but no cook function will operate.
If the primary door switch is open, the display will
function but microwave heating, and the turntable,
convection, and damper motors will not operate.
The purpose of the halogen heater interlock switch
is to prevent halogen heater operation when the
door is open.
The primary interlock, monitor interlock, door
sensing, and halogen heater interlock switches are
mounted on plastic latch boards. The latch boards
are attached to the left and right side of the oven
cavity. The left side latch board contains the door
sensing (secondary interlock) and halogen switches.
The right side latch board contains the primary
interlock and monitor interlock switches.
LEFT LATCH BOARD
Halogen Heater Interlock
Door Sensing
(Secondary Interlock)
RIGHT LATCH BOARD
Monitor Interlock Switch
Primary Interlock
Switch
– 44 –
Right side Latch Board Shown
How to Test Primary Interlock, Door Sensing, and
Halogen Switches:
1. Disconnect power and partially remove the
oven from it's installation. (See
)
.
Partial Removal
2. Remove the single Phillips-head screw that
holds each door switch access cover to the
outer cover.
3. Remove the primary interlock, door sensing, and
halogen switch leads to isolate each switch.
4. Check continuity of each switch with door open
and door closed. Normal readings are as follows:
• Door Closed: 0 Ω
• Door Open: Infi nity
How to Test the Monitor Switch:
The right side latch pawl pushes horizontally
Note:
and actuates the lever of the monitor interlock,
opening the switch.
1. Disconnect power and partially remove the
oven from it's installation. (See
)
.
Partial Removal
2. Remove the single Phillips-head screw that
holds the right side door switch access cover to
the outer cover.
3. Remove the monitor switch leads to isolate the
switch.
Monitor Interlock Switch
Primary Interlock Switch
Oven Removal /
Oven Removal /