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6. Troubleshooting
6-1 Electrical Malfunction
Parts
Cause
Diagnosis
Remedy
Microwave
turns off
during
cooking cycle .
1) Too small a load
If a small amount of food is heated for a long
time, period of microwave may turn off during
operation .
To increase the oven
water into water into
the oven .
2) Defective
magnetron thermal
cutout S/W
Check to see if the magnetron thermal cutout
switch is activated at a temperature higher
than 90 ºC .
Replace thermal
cutout switch .
properly
shock is felt .
Incomplete
grounding
Make sure that qrounding of the power
supply cord has been done properly .
Rewire .
Door doe
not operate
properly
1) Broken door
hinges
Remove the cabinet for inspection . Check
the door hinge .
Replace door hinges .
2) Missing or loose
screw
Check if the screws are secured well to the
door hinge .
Fasten or tighten .
Magnetron
thermal cutout
switch OFF
2) Defective fan
motor
If the fan motor does not operate with 230V
applied to the terminal, the motor may be
faulty .
Replace fan motor .
3) Too small a load
or no load
If a small amount of food is heated
repeatedly over a long period of time,
microwave turns off during operation .
To increase the oven
load, place a glass of
water into the oven .
