36
4. Troubleshooting
SYMPTOM
DIAGNOSIS
REMEDY
Oven not
operating
(No power,
No display)
*
Measure an input voltage.
9RU9
*
Measure an input voltage of terminal
block.
*
Check circuit breaker.
*
Make sure that the state of wire is
connected with Terminal block.
*
Make sure that the relay on Main
PCB is being worked normally.
*
Make sure whether harness between
connector (CNS302,CNS303) on
main PCB has been loosen or
disconnected.
*
Replace Main PCB if relay has been
damaged or there is any cracking on the
Main PCB.
*
Repair harness is connected main PCB.
*
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inserted into relay on Main PCB or not, take
action follow as;
-
Replace or repair harness.
-
Replace or repair main PCB.
*
Measure resistance both ends of
terminal on thermostat.
(normal : 0 ohms)
*
Check whether harness is connected
terminal on thermostat has been
loosen or disconnected.
*
Measure voltage regulator
(IC02,IC03) on main PCB.
-
IC02 : 7812(DC 12V)
-
IC03 : 7805(DC 5V)
*
Replace the thermostat.
*
Replace or repair harness.
*
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of working of main PCB.
Oven temperature
is risen slowly.
*
Make sure whether harness is
connected with Broil, Bake and
convection heater has been loosen
or disconnected.
*
Repair and replace harness.
*
Make sure whether Broil, Bake,
and convection heater has been
disconnected.
*
After taking out terminal from each heater,
measure resistance of heater and then
replace that if it is not a normal resistance
value.
*
Make sure that heater relay and
pattern on Main PCB.
*
Replace or repair relay.
*
Replace or repair Main PCB.
