6-2
Parts
Cause
Diagnosis
Remedy
1) Too small
If a small amount of food is heated for a long time,
To increase the oven
a load
period of microwave may turn off during operation.
load, add a glass of
Microwave
water into the oven.
turns off
during cook-
2) Defective
Check to see if the magnetron thermal cutout switch is
Replace thermal cutout
ing cycle.
magnetron
activated at a temperature higher than 150˚C.
switch.
thermal
cutout S/W
Electric
Incomplete
Make sure that qrounding of the power supply cord has
Rewire.
shock is
qrounding
been done properly.
felt.
Door does
1) Broken door
Remove the cabinet for inspection.
Replace door hinges.
not operate
hinges
Check the door hinge.
properly
2) Missing or
Check if the screws are secured well to the door hinge.
Fasten or tighten.
loose screw
1) Defective
If the timer does not operate with 220~230V applied to the
Replace timer.
Timer does
timer motor
terminals, the timer motor amy be faulty.
not operate.
2) Defective
The lamp does not light.
Replace timer
contacts
of timer S/W
Cooking tray
1) Defective
Check to see if 220~230V exists at the motor terminals.
Replace drive motor.
does not
drive motor
If so, motor will be defective.
rotate.
1) Blocking of
Check if the air inlet or outlet ventilation is blocked
Keep a distance of
the ventilator
by the wall or other objects.
100mm from the
wall or the objects.
Magnetron
2) Defective
If the fan motor does not operate with 220~230V applied
Replace fan motor.
thermal
fan motor
to the terminal, the motor may be faulty.
cutout
switch
3) Too small a
If a small amount of food is heated repeatedly over
To increase the oven
OFF
load or no
a long period of time, microwave turns off during
load, place a glass of
load
operation.
water into the oven.
6-1 Electrical Malfunction (Continved)
Troubleshooting
