SOI/TD 2005-2 PR
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599 36 83-66
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7 ELECTRICAL COMPONENTS AND FUNCTIONS
7.1 EDW503 Electronic control system
The EDW503 control system consists of a main circuit board and a control/display board. Both
boards are housed in a plastic container (fig. 1). The On/Off function is performed by the button
S0
.
7.1.1 Functions of the circuit board
The circuit board receives signals relative to the cycle settings via the control/display board. The buttons
and LEDs are also mounted on this board.
The board also powers all the electrical components (solenoid valves, washing pump, detergent/rinse-
aid dispenser, drain pump, heating element)
The board controls the temperature of the washing water via an NTC sensor
The circuit board monitors the status of the pressure switch and the rinse-aid/salt sensors.
fig.1
DISPLAY BOARD
Buttons
LEDs
SENSORS
ELECTRICAL
LOADS
MAIN CIRCUIT BOARD
µ
P