SOI 05.09 FV
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599 71 58-20
5.3 -
OTHER MALFUNCTIONS
5.4 - TESTING THE FINAL STAGES OF THE POWER BOARD
In case of doubt about the efficiency of the power board, the service engineer can measure the resistance of
the IGBT final power stages.
Measure their resistance across pins 1 and 2 or across pins 2 and 3 (see fig. 30).
If the resistance is greater than 50 k
Ω
, the final stage is not faulty. If the resistance is less then 50 k
Ω
, the
final stage is faulty and the power board must be replaced.
Fig. 30
Control
Result/Display
Cause
Solution
Condition
The buzzer
does not
sound
Control board faulty
Replace control
board
An individual
display does
not light, lights
partially or
flickers
Control board faulty
Replace control
board
The pan emits
a noise
Check the type
and shape of
the pan
Noise is generated
by interference
between the high
frequency signal
and the pan
Use a pan of
the correct size
and shape
The pan is
unsuitable
Certain types of
pans with particular
shapes may
produce a slight
noise, but this does
not affect operation
and is not a fault
See section 2.3
"TYPES
OF
PANS
FOR
MAGNETIC
INDUCTION
COOKING"
The pan is suitable
PIEDINI