TROUBLE 5) Bottom heater is not heated; food will not become hot.

CONDITION

Bottom heater is not heated.

CHECK

Check continuity of Primary interlock switch

Check continuity of secondary interlock

switch

Check continuity of heater

Check D.C voltage

Being supplied to

RELAY (RY7) coil

RESULT

No

Continuity

No

Continuity

No continuity

0V

Approx. 24V DC

CAUSE

Malfunction Of primary Interlock switch

Malfunction Of secondary interlock switch

Defective heater

Defective Touch control circuit

Faulty contacts of RELAY (RY7) or open relay coil

REMEDY

Adjust or

Replace

Adjust or replace

Replace

Replace

Replace

(TROUBLE 6) The Following visual conditions indicate a probable defective touch control Circuit or button P.C.B assembly

1.incomplete segments.

1)segment missing

2)partial segments missing

3)digit flickering other than normal fluorescent slight flickering

2.A distinct change in the brightness of one or

more numbers exists in the display

3. One or more digits in the display are not on when they should be.

4. Display does not count down or up with time cooking or clock operation.

5.Oven is programable and cooks normally but no display shows.

6.Display obviously jumps in time while counting down.

7.display counts down noticeably too fast while cooking.

8.Display does not show the time of day when clear button is touched. 9.Oven lamp and turn table motor do not stop although cooking is finished.

Check if the RELAY(RY4) contacts close and if they are close, replace touch control circuit.

CONDITION

Display does Not show Programming At all. Even if button is Touched.

CHECK

Check each button For continuity of the Button

RESULT

Normal

CAUSE

Malfunction Of touch Control circuit of Control box sub-assembly

REMEDY

Replace control box sub-assembly

21

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Daewoo KOC-1B0K0S service manual Bottom heater is not heated

KOC-1B0K0S specifications

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