Daewoo KOT-123Q0A Service Manual page 24

CONDITION
Outlet has
proper voltage
Fuse does not
open.
(TROUBLE2) Display shows all figures selected, but oven does not start cooking, even though desired program and time
are set and start pad is tapped.
CONDITION
Turntable motor,
fan motor
and oven lamp
do not turn on.
Turntable motor,
fan motor
and oven lamp
turn on
for a second
when the start
pad is tapped.
CHECK
Check continuity of
open thermostat.
Check continuity of
power supply cord.
Display do not
shown countdown.
CHECK
Check continuity of
primary interlock switch.
Check D.C. voltage
being supplied to
RELAY (RY2) coil.
Check continuity of
primary winding of
high voltage
transformer and touch
control circuit.
RESULT CAUSE
No Defetive
Continuity oven thermostat.
No Open power
Continuity supply cord.
Normal
Defetive touch
control circuit
Malfunction of
secondary
interlock switch.
RESULT CAUSE
No Malfunction
Continuity of primary
interlock switch.
Malfunction of
OV
secondary
interlock switch.
Approx
Faulty contacts
24V DC
of RELAY(RY2)
coil
No Open winding
Continuity
Normal
Defective touch
control circuit
23
TROUBLESHOOTING GUIDE
REMEDY
Replace
Replace
Replace
Replace
REMEDY
Adjust or replace.
Replace
Replace
Replace.
Replace