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Turbidity sensor
Machines with an auto program have a
turbidity sensor that measures how cloudy
the water is. The sensor comprises an LED
and a phototransistor. Between these two is
the dishwater. The less light that reaches the
phototransistor, the cloudier the water. The
sensor is calibrated during the last rinse of
the auto program. At different points during
the auto program the output signal from the
turbidity sensor provides data used to deter-
mine how the program will continue (number
of prewashes, temperature, program time,
number of rinses and so on).
If the turbidity sensor fails, the machine as-
sumes the water is “very cloudy”, which results
in a longer program time, prewashes, additional
rinses and so on.
The turbidity meter is located at the front edge
of the bottom drain.
Humidity sensor
The humidity sensor is located in the fan
house. The sensor is of the capacitive type
and measures relative humidity. The humid-
ity sensor measures the ambient humidity
before the drying process begins. The drying
process continues until the humidity sensor
detects a level slightly above ambient humid-
ity (min. time 30 min. and max. time 70 min.).
COMPONENT INFORMATION
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