GEAppliances CFE28TSH Technical Service Manual page 31

There are two modes of operation for water
dispense: Precise Fill and Auto Fill.
By selecting Precise Fill, the customer can select the
amount of water.
By selecting Auto Fill, the dispenser will function
by the use of four ultrasonic sensors (two sensors
located below the base of the paddle, and two
sensors located in front of the dispenser funnel).
These sensors measure the height, width, volume,
the container to approximately
Ultrasonic sensors work in much the same way as
backup sensors used on many automobiles.
This system is operated by the LCD control and the
door control board.
When using Auto Fill, if a container is not placed
in the dispenser, Auto Fill will not operate, and the
display will notify the consumer.
*
90% full .
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