TROUBLE SHOOTING GUIDE

Following the procedure below to check if the oven is defective or not.

1) Check earthing before trouble checking.

2) Be careful of the high voltage circuit.

3) Discharge the high voltage capacitor.

4) When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts

and check continuity with the AC plug rem o ve d. To do otherwise m ay result in a false reading or damage to you r m e ter.

(TROU B L E 1)

Oven does not ope rate at all : any inputs can no t be ac ce pted .

NOTE
When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connected of the terminals and power cord before check the parts listed below.

CHECK RESULT CAUSE REMEDY

Fuse blows. Continuity
No Continuity
Continuity
0 infinite
Ω
or
Approx.
150~310
(normal)
Replace
NOTE 1
Replace
NOTE 1
Replace
Replace
Check continuity of
primary winding of low
voltage transformer
Malfunction
of interlock
monitor
switch
Defective low
voltage
transformer
Check continuity of
interlock monitor switch
with door closed
(COM NC)
Check continuity of primary
interlock switch contact
with door partially open
until interlock monitor switch
contact close
(COM<->NO)
Shorted contacts
of primary
interlock switch.
Fuse again
blows
Disconnect high voltage
fuse and operate the unit Defective high
voltage transformer
CONDITION
No Continuity Replace
NOTE 1
Check continuity of both
primary and secondary
interlock switch with door
colosed
Malfunction of
interlock switch
No Continuity
Continuity