19
6. Troubleshooting
part
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 150 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.
Cooking tray
does not
rotate.
1) Defective drive
motor
Check to see if 21V exists at the motor
terminals.If so, motor will be defective.
Replace drive motor.
1) Blocking of the
ventilatior
Check if the air inlet or outlet ventilation
is blocked by the wall or other objects.
Keep a distance of
100mm from the wall or
the objects.
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.
