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6-1 Electrical Malfunction(continued)
part
1) Too small
a load
Microwave
turns off during
2)Defective
cooking cycle.
magnetron
thermal
cutout S/W
properly
In complete
shock is
grounding
felt.
1) Broken door
Door doe not
hinges
operate
2) Missing or
properly
loose screw
1) Defective
timer motor
Timer does
not operate.
2) Defective
contacts of
timer S/W
1) Defective
drive motor
Cooking tray
does not
1) Blocking of
rotate.
the ventilatior
2) Defective fan
Magnetron
motor
thermal
cutout
3) Too small a
switch
load or no
OFF
load
Cause
If a small amount of food is heated for a long time,
period of microwave may turn off during operation.
Check to see if the magnetron thermal cutout switch
is activated at a temperature higher than 150 .
Make sure that grounding of the power supply cord
has been done properly.
Remove the cabinet for inspection. Check the door
hinge.
Check if the screws are secured well to the door
hinge.
If the timer does not operate with 230V applied to
the terminals, the timer motor amy be faulty.
The lamp does not light.
Check to see if 230V exists at the motor terminals.If
so, motor will be defective.
Check if the air inlet or outlet ventilation is blocked
by the wall or other objects.
If the fan motor does not operate with 230V applied
to the terminal, the motor may be faulty.
If a small amount of food is heated repeatedly over
a long period of time, microwave turns off during
operation.
Diagnosis
Remedy
To increase the oven
water into water into
the oven.
Replace thermal cutout
switch.
Rewire.
Replace door hinges.
Fasten or tighten.
Replace timer.
Replace timer
Replace drive motor.
Keep a distance of
100mm from the wall
or the objects.
Replace fan motor.
To increase the oven
load, place a glass of
water into the oven.
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