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6 ELECTRICAL COMPONENTS AND FUNCTIONS

6.1 EDW2503 Electronic control system

The EDW2503 electronic control system consists of:

• One central display board with LCD and uses a separate ON/OFF button.

• One main board (fig. A) placed in the lower part of the appliance, anchored to the base by a

plastic support (as for appliances “DIVA” EDW2000/2003/2500).

The “Talkie” version features also an electronic board, placed under the control panel and contained in

a plastic box, specific for the voice control and connected electrically to the speaker positioned on the inner

door.

6.1.1 Functions performed by the mother board

 Acquires cycle programming and commands through the input and output boards.

 Powers all the electrical components (solenoids, wash pump, detergent/rinse-aid dispenser, drain

pump, heating element, fan motor)

 Controls the temperature of the wash water using a signal from an NTC sensor, and controls the

speed of the wash pump using a signal from a tachometric generator.

 Monitors the pressure switches and the rinse-aid / salt sensors.

6.1.2 Memories contained in the electronic control system

The main board is equipped with an EEPROM that is external to the microprocessor and which is

used to store data on machine configuration, programming for the cycle, and status of the cycle in case of a

power failure or alarm.

The configuration data is programmed at the factory by a computer with a DAAS interface. This

data determines the operation of the appliance (number and types of programmes, options, LEDs, etc).

SENSORS

ELECTRIC

LOADS

MAIN BOARD

(Buzzer)

INPUT AND OUTPUT BOARDS

Buttons LEDs

Display

ROM

RAM

EEPROM

External serial

port

Asynchronous

Internal serial

port

Synchronous

Power failure and

machine status

Configuration of

appliance

Description for the

cycle

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 40 41

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