Warning To Service Technicians - KitchenAid KBMS1454R Technical Education

WARNING TO SERVICE TECHNICIANS

To avoid possible exposure to microwave ra-
diation or energy, visually check the oven for
damage to the door and door seal before
operating any oven. Use a microwave survey
meter to check the amount of leakage before
servicing. In the event the R.F. Ieakage ex-
ceeds 4 mw/cm 2 at 5 cm, appropriate repair
must be made before continuing to service the
unit. Check interlock function by operating the
door latch. The oven cook cycle should cut off
before the door can be opened.
The door and latching assembly contains the
radio frequency energy within the oven. The
door is protected by three safety interlock
switches. Do not attempt to defeat them.
Under no circumstances should you try to
operate the oven with the door open.
• Proper operation of microwave ovens re-
quires that the magnetron be properly
assembled to the waveguide and cavity.
Never operate the magnetron unless it is
properly installed.
• Be sure the "RF" seal is not damaged and
is assembled around the magnetron dome
properly when installing the magnetron.
• Routine service safety procedures should
be exercised at all times.
• Untrained personnel should not attempt
service without a thorough review of test
procedures and safety information con-
tained in this Job Aid.
KitchenAid microwave ovens have a monitor-
ing system designed to assure proper opera-
tion of the safety interlock systems.
The monitor switch will immediately cause the
oven fuse to blow if the door is opened and the
primary door interlock switch and/or the sec-
ondary interlock switch contacts fail in a closed
position.
CAUTION: Replace a blown fuse with a 20
ampere class H fuse only.
Test the upper and lower door interlock
switches, cook relay, and monitor switch (middle
switch) for proper operation as described in the
component test procedures, before replacing
the blown oven fuse.
Do not attempt to repair sticking contacts
of any interlock switch, safety switch, or
Cook (Latch) relay. The components must
be replaced.
Any indication of sticking contacts during com-
ponent tests requires replacement of that com-
ponent to assure reliability of the safety inter-
lock system.
If the fuse is blown, the Monitor switch, and
the Primary, and Secondary interlock
switches must be replaced. Be sure they
are properly connected.
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