Daewoo KOG-846T, Руководство по обслуживанию, Страница: 15 / 28

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TROUBLE SHOOTING GUIDE
NOTE : When electric parts are checked or replaced, 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.
(TROUBLE 1) Oven does not operate at all; any inputs can not be accepted
Condition
Fuse blows
Continuity
Continuity
Continuity
Shorted contacts
of primary
interlock switch
No
Continuity
No
Continuity Malfunction of
interlock switch
Check continuity
of interlock monitor
switch with door closed
(COM
¡Œ
NC)
Check continuity
of both primary and
secondary interlock
switch with door closed
Check continuity of
primary interlock switch
contact with door partially
open until interlock
monitor switch contact
close (COM
¡Œ
NC close)
Check continuity of
primary winding of low
voltage transformer. 0
Ω
or infinite
Approx.
150~210
(normal)
Defective low
voltage
transformer
Disconnect high
voltage fuse and operate
the unit.
Fuse again
blows
Defective high
voltage
transformer
Malfunction of
interlock monitor
switch Replace
Replace
Replace
Replace
Replace
Check Result Cause Remedy
(COM ¡Œ NC)
(COM ¡Œ NC)
Note 1.
Note 1.
Note 1.
F9
F10 F9
F10
11. To remove grill heater assembly (Refer to Fig. 13)
1) Release three hex nuts holding the Grill Heater Assembly to top and side plate.
2) Remove Grill heater Assembly.
Following the procedure below to check if the oven is defective or not.
1. Check earthing before fault finding.
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 removed. To do otherwise may result in a false reading or
damage to your meter.
FIG. 13