9-20
CHECKING FLOW CHART BY FAILURE
Convection fan not work, F7?
Check the resistance of each
fan motor. Normal?
(Measure the resistance after
cooling down.
The resistance is shown below)
No
Replace the
Fan motor
1
Fan High
Fan Low
Unplug the unit
Is the fan motor
relay normal?
Measure the resistance of
fan motor relay and Live
Normal: infinite
Abnormal: shorted
No
Replace the
failed heater
2
yes
Yes
5
th
and 7
th
pin of CN53 : RY 8
3
th
pin and 7
th
pin of CN53 : RY 9
Conv. Fan
High
Conv. Fan
Low
Fan motor
Resistance[
Ω
]
Approximately
Fan High
25 ± 10%
Fan Low
30 ± 10%