Daewoo KOG-373R0S Trouble Shooting Guide, Malfunction of, Disconnect high voltage fuse

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 tranformer, 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.

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.

(TROUBLE 1) Oven does not operate at all : any inputs can not be accepted.

CONDITION

Fuse blows.

CHECK	RESULT
Check continuty of interlock
	Continuity
monitor switch with door closed
(COM ↔ NC)
	No Continuity

CAUSE

Malfunction of interlock monitor switch

REMEDY

Replace

NOTE 1

Check continuity of both	No Continuity
primary and secondary		Malfunction of
interlock switch with door
colosed	Continuity	interlock switch

Replace

NOTE 1

Check continuity of primary interlock switch contact with door

partially open until interlock monitor switch contact close (COM ↔ NC)

Check continuity of primary winding of low voltage transformer

Continuity

0Ω or infinite

Approx.

150~310

(normal)

Shorted contacts of primary interlock switch.

Defective low voltage transformer

Replace

NOTE 1

Replace

Disconnect high voltage fuse	Fuse again	Defective high
		voltage
and operate the unit	blows
		transformer

Replace

45