SOI/DT 2003 - 01 eb 15 599 35 63-72
6 ELECTRICAL COMPONENTS AND THEIR FUNCTIONS
6.1 EDW1500-1510 Electronic control system
The EDW1500 control system consists of a main circuit board and a control/display board. Both boards are
housed in a plastic container.
Version with horizontal buttons Version with vertical buttons
6.1.1 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, fan motor).
The board controls the temperature of the washing water via an NTC sensor, as well as the speed of
rotation of the washing pump according to the signal received from the tachymetric generator.
The circuit board monitors the status of the pressure switch and the rinse-aid/salt sensors.
6.1.2 Memory in the control system
The main circuit board features an EEPROM memory (external to the microprocessor) which stores in
memory data relative to the configuration, description of the cycle, cycle status in case of a power failure,
and any alarm conditions.
The configuration data (entered in the factory using a computer with a DAAS interface) determine the
functionalities of the appliance (number and type of programmes, options, LEDs etc.).
P
ROM
RAM
EEPROM
(external
to the µP)
Asynchronous
external serial
port
Synchronous
internal serial p
Power Fail and
machine status
Configuration of
the appliance
Description of the
cycle
SENSORS
LOADS
Buttons LEDs
Display
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