18
6. Troubleshooting
WARNING FOR HIGH VOLTAGE
4000 VOLTS EXIST AT THE HIGH VOLTAGE AREA. DO NOT OPERATE THE OVEN WITH CABINET PARTS
REMOVED. DO NOT REMOVE THE CABINET PARTS IF THE POWER SUPPLY CORD IS PLUGGED IN
THE WALL OUTLET. UNPLUG THE POWER CORD BEFORE SERVICING.
6-1 Electrical Malfunction
Parts
Cause
Diagnosis
Remedy
Fuse blows
out when
door is
opened.
Defective primary
interlock switch
are winding.
Check continuity of the primary switch
terminals with wire removed using a
multimeter. If there is continuity inter
between switch terminals when door is
opened,the switch is defective.
Replace the primary
interlock switch
Defective in terlock
monitor switch
Check continuity of the monitor switch
terminals with wire removed by using a
multimeter. If there is continuity between
switch terminals the door is closed, the
switch is defective.
Replace the interlock
monitor switch
Fuse is
Open
Layer short of the
secondary coil of
H. V. Transformer
The fuse will not blow right away, but if it
blows in a few seconds, then there is a
layer short If the fuse blows with H. V. Trans
secondary open, the transformer may be
faulty.
Replace
H.V.Transformer
Oven lamp
does not
light.
1) Fuse blown out
Check fuse.
Replace the fuse.
2) Poor contact of
power cord.
Check continuity of power supply cord. Also
check whether the power cord is securely
wired.
Adjust or replace the
power supply cord
3) Defective lamp
The fan motor rotates, but lamp does not
light.
Replace the lamp.
4) Defective timer
contacts
Check the terminals of timer for continuity,
turning the timer knob ON and OFF
repeatedly.
Replace the timer.
5) Thermal cutout
S/W open
In this case the oven lamp and fan do not
turn on
Replace the thermal
cutout S/W
Fan does
not operate.
1) Defective fan
motor.
If 230V is found at motor terminals, the
motor should be replaced.
Replace the motor.
2) Defective con
tacts of timer
The oven lamp does not light and fan motor
does not operate.
Replace the timer.
NOTE
: Interlock monitor switch must be replaced when the fuse is blown out.
