Daewoo KOM-9F2CKS, Руководство по обслуживанию, Страница: 19 / 40

18
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 load wire from these
parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to
your meter.
(TROUBLE 1) Oven does not operate at all : any inputs can not be accepted.
NOTE : When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connection of the terminals and power cord before check the parts listed below.
CONDITION CHECK
Check continuity of interlock
monitor switch with door closed
Malfunction of
interlock
monitor switch
RESULT
Continuity
No Continuity
Replace fuse
CAUSE REMEDY
Replace
Fuse blows.
Shorted contacts
of primary
interlock switch.
Continuity
Replace
Check continuity of primary
interlock switch contact with
door partially open until interlock
monitor switch contact close
Defective low
voltage
transformer
0 Ω or infinite
Approx.
260~320
(normal)
Replace
Check continuity of primary
winding of low voltage
transformer
Defective high
voltage
transformer
Normal
Replace
Disconnect high voltage fuse
and operate the unit
Defective high
voltage
transformer
Fuse again
blows
Replace
TROUBLESHOOTING GUIDE