beautypg.com

Trouble shooting guide – Daewoo KOR-180A0A User Manual

Page 19

background image

TROUBLE SHOOTING GUIDE

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

1) Check grounding 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.

(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

Check continuity of of primary
interlock switch contact with door
partially open until interlock
monitor switch contact close

Malfunction of
interlock
monitor switch

Shorted
contacts of
primary
interlock switch.

RESULT

Continuity

No Continuity

Replace fuse

CAUSE

REMEDY

Replace

NOTE 1

Fuse blows.

Replace

NOTE 1

Defective low
voltage
transformer

0 or infinite

Approx.

150~310

(normal)

Replace

Check continuity of primary
winding of low voltage
transformer

Defective high
voltage capacitor

Normal

Replace

Disconnect one side of the lead
wire connected form high
voltage transformer to the high
voltage capacitor and operate
the unit

Continuity

Defective high
voltage
transformer

Fuse again

blows

Replace

19

This manual is related to the following products: