Daewoo KOC-910K0P Service Manual page 27

(TROUBLE 4)
Grill heater (upper heater) is not heated; food will not become hot.
CONDITION
Grill heater is
not heated.
(TROUBLE 5)
1) Convection heater is not heated; food will not become hot.
2) Convection fan motor does no rotate.
CONDITION
1) Convection
heater is
not heated.
2) Convection
fan and
motor dees
not rotate.
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 (RY2) coil
CHECK
Check continuity of
primary interlock switch
Check continuity of
secondary interlock
switch
Check continuity of
(heater or fan)
Check D.C voltage
being supplied to
RELAY (RY3, RY6) coil
RESULT
No
primary Interlock
continuity
No
continuity
interlock switch
No
Defective heater
continuity
Defective touch
0V
Approx. Faulty contacts of
24V DC
RESULT
No
primary Interlock
continuity
No
continuity
No
Defective heater
continuity
Defective touch
0V
Faulty contacts of
Approx.
24V DC
26
CAUSE
REMEDY
Malfunction of Adjust or
switch
Adjust or
Malfunction of
secondary
Replace
Replace
control circuit
Replace
RELAY
(RY2) or open
relay coil
CAUSE REMEDY
Malfunction of
Adjust or
switch
Adjust or
Malfunction of
secondary
interlock switch
or fan
control circuit
RELAY
(RY3,RY6) or
open relay coil
replace
replace
replace
replace
Replace
Replace
Replace