Technical Characteristics; Ewm2000Evo Electronic Control; Functions Of The Circuit Board; Memory In The Control System - Electrolux Washer Service Manual

10 TECHNICAL CHARACTERISTICS

10.1 EWM2000EVO Electronic control

The EWM2000 EVO electronic control consists of a main PCB
(1) and a control/display board (2).

10.1.1 Functions of the circuit board

PROGRAMM
E
SELECTOR
SENSORS
The circuit board receives signals relative to the cycle settings via the control/display board. The
buttons, the LEDs and the display are also mounted on this board which is connected to the programme
selector.
The board also powers all the electrical components (solenoid valves, washing motor, drain pump,
heating element, door interlock).
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 tachometric generator.
It checks the water level in tub via the level pressure switch and the safety one.
It controls the water level via the flow meter.
It checks the turbidity of the rinse water via the turbidity sensor.

10.1.2 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 2004-07 dmm
DISPLAY BOARD
LEDs
MAIN CIRCUIT BOARD
µP
Synchronous
RAM
internal serial
µP
Display
Buttons
µP
EEPROM
(external
to the µP)
port
32/65
Buzzer
ELECTRICAL
LOADS
Power Fail and
machine status
Configuration of
the appliance
Description of the
cycle
599 36 54-15