Electrical Components And Their Functions; Edw1503 Electronic Control System; Functions Of The Circuit Board; Memory In The Control System - Electrolux DIVA 60 cm Service Manual

6 ELECTRICAL COMPONENTS AND THEIR FUNCTIONS

6.1

EDW1503 Electronic control system

The EDW1503 control system consists of a main circuit
board and a control/display board. Both boards are
housed in a plastic container.
6.1.1

Functions of the circuit board

SENSORS
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

Asynchronous
external serial
ROM
port
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.).
SOI/DT 2003 - 01 eb
DISPLAY BOARD
LEDs
MAIN CIRCUIT BOARD
µP
Synchronous
RAM
internal serial p
Display
Buttons
µP
(Buzzer)
EEPROM
(external
to the µP)
15
ELECTRICAL
LOADS
Power Fail and
machine status
Configuration of
the appliance
Description of the
cycle
599 35 64-85