6-1
Parts
Cause
Diagnosis
Remedy
Fuse blows
Defective primary
Check continuity of the primary switch terminals with
Replace the primary
out when
interlock switch
wire removed using a multimeter. If there is continuity
interlock switch
door is
ary winding.
between switch terminals when door is opened,
opened.
the switch is defective.
Defective interlock
Check continuity of the monitor switch terminals
Replace the interlock
monitor switch
with wire removed by using a multimeter.
monitor switch
If there is continuity between switch terminals
when the door is closed, the switch is defective.
Fuse is
Layer short of the
The fuse will not blow right away, but if it blows in a
Replace H. V. Transformer
open.
secondary coil of
few seconds, then there is a layer short.
H. V. Transformer
If the fuse blows with H. V. Trans secondary open, the
transformer may be faulty.
1) Fuse blown out
Check fuse.
Replace the fuse.
2) Poor contact of
Check continuity of power supply cord. Also check
Adjust or replace the
power cord
whether the power cord is securely wired.
power supply cord.
3) Defective lamp
The fan motor rotates, but lamp does not light.
Replace the lamp.
Oven lamp
4) Defective timer
Check the terminals of timer for continuity,
Replace the timer.
does not
contacts
turning the timer knob ON and OFF repeatedly.
light.
5) Thermal cutout
In this case the oven lamp and fan do not
Replace the
S/W open
turn on
thermal cutout S/W
1) Defective
If 220~230V is found at motor terminals, the motor
Replace the motor.
Fan does
fan motor.
should be replaced.
not operate.
2) Defective con-
The oven lamp does not light and fan motor
Replace the timer.
tacts of timer
does not operate.
NOTE
:
Interlock monitor switch must be replaced when the fuse is blown out.
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
6. Troubleshooting
