Specifications

5-17
(TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired
program times are set and START pad is touched.
(TROUBLE 4) Oven seems to be operating but little heat is produced in oven load.
CONDITION CHECK RESULT CAUSE REMEDY
1.Setting time does
not count down
when touching
START pad.
2. Fan motor or
oven lamp do
not turn on.
No continuity.
Continuity.
Continuity
No continuity
Check the con-
nection between
CN1 connector
and P.C.B
assembly.
Defective
secondary switch.
Replace
secondary switch.
Defective P.C.B
assembly.
Replace P.C.B
assembly.
Check continuity
of secondary
switch (with
door closed).
Check fan motor.
Check oven lamp.
Check continuity
of primary switch.
Abnormal.
Abnormal.
Normal.
Defective fan motor.
Defective oven lamp.
Replace fan motor.
Replace oven lamp.
No continuity
Continuity
Defective primary switch. Replace primary switch.
Loose connection.
Connect them
tightly.
CONDITION CHECK RESULT CAUSE REMEDY
Output is low.
Lower than 90% of
rating voltage.
Normal.
Normal.
Abnormal.
Abnormal.
Measure the
output power.
Disconnect the
wire leads from
relay 2 and
check on and off
time with
multitester.
Defective P.C.B
assembly.
Replace P.C.B
assembly.
Decrease in power
source voltage with
load.
Suggest customer
contact local electric
power utility co. or
qualified electrician.
Check the
power source
voltage.
Defective
magnetron.
Replace
magnetron.
NOTE: Simple test of power output-conducted by heating one liter water for one minute if available.
Minimum 8.5˚C temperature rise is normal condition.