SOI/DT 2004-07 dmm
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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
Ö
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.
Ö
The board also powers all the electrical components (solenoid valves, washing motor, drain pump,
heating element, door interlock).
Ö
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.
Ö
It checks the water level in tub via the level pressure switch and the safety one.
Ö
It controls the water level via the flow meter.
Ö
It checks the turbidity of the rinse water via the turbidity sensor
.
10.1.2 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)
.
SENSORS
ELECTRICAL
LOADS
PROGRAMM
E
SELECTOR
Buzzer
MAIN CIRCUIT BOARD
µ
P
DISPLAY BOARD
µ
P
Buttons
LEDs
Display
µ
P
ROM
RAM
EEPROM
(external
to the
µ
P)
Asynchronous
external serial
port
Synchronous
internal serial
port
Power Fail and
machine status
Configuration of
the appliance
Description of the
cycle
