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(TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired
program times are set and START pad is touched.
CONDITION
Check continuity
1. Setting time
of secondary
does not count
switch (with
down when
door closed).
touching START
pad.
Check the con-
nection between
CN1 connector
and PCB
assembly.
Check fan motor.
2. Fan motor or
oven lamp do
Check oven lamp.
not turn on.
(TROUBLE 4) Oven seems to be operating but little heat is produced in oven load.
CONDITION
Output is low
Check the
power source
voltage.
Disconnect the
wire leads from
relay 2 and
check on and off
time with
multitester.
Measure the
output power.
NOTE : Simple test of power output-conducted by heating one liter water for one min. if available.
Minimum 8.5°C temperature rise is normal condition.
All manuals and user guides at all-guides.com
CHECK
RESULT
No continuity.
Continuity.
Continuity
No continuity
Abnormal
Abnormal
Normal
CHECK
RESULT
Lower than 90% of
rating voltage.
Normal
Abnormal
Normal
Abnormal
CAUSE
Defective
secondary switch.
Defective PCB
assembly.
Loose connection.
Defective fan motor.
Defective oven lamp.
CAUSE
Decrease in power
source voltage
with load.
Defective PCB
assembly.
Defective
magnetron.
5-14
REMEDY
Replace
secondary switch.
Replace PCB
assembly.
Connect them
tightly.
Replace fan motor.
Replace oven lamp.
REMEDY
Suggest customer
contact local
electric power
utility co. or
qualified
electrician.
Replace PCB
assembly.
Replace
magnetron.
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