Control System 21Service Manual – SC3000
Control System
Functional Description
The architecture of the electronic system controlling the electrical machine utilities consists of a main elec-
tronic board (EB1), and a display electronic board (EB2) which is connected to the dashboard (EB3) - the main
user interface.
The main electronic board (EB1) manages all the utilities.
It drives directly the following accessories:
− Drive system motor with electromagnetic parking brake
− Vacuum system motor
− Deck actuator
− Squeegee actuator
− Solution ow solenoid valve
− Detergent pump
− Buzzer
It drives the brush deck motors by means of the electromagnetic switch.
The display electronic board (EB2) manages all the input signals (push-buttons) and the output signals (LED)
from keyboard (EB3) to which it is connected by 2 at cables.
There is also a 3-gure display on the display electronic board (EB2), which is mainly used to display the hour
counter, the solution tank level, and for any alarms (see below). There are also 2 microswitches activated by
the levers under the steering wheel.
The display electronic board (EB2) sends all the input and output signals of these components to the main
electronic board (EB1) using 2-wire 2-way serial communications protocol.
The system also has an on-board battery charger which also communicates with the main electronic board
(EB1) using propriety serial protocol, so the operator can see the operating state (charging phase) on the same
user interface of the dashboard (EB3).
Wiring Diagram
Dashboard power supply +
Dashboard serial +
Dashboard serial -
Dashboard power supply -
Dashboard instrument electronic board (EB3)
Display electronic board (EB2)
Function electronic board (EB1)
P100546
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