Scrub System, Disc
61
Service Manual – SC2000
Scrub System, Disc
Functional Description
The disc brush system can be started by the operator.
The disc brush turn counter-clockwise.
The rotating brush system cleans the surface of the
floor. The main component of the brush system is the
deck where the brush or the pad-holder with pad suit-
able for the type of surface to be cleaned is installed.
The brush deck is installed on a frame to which the
electrical actuator and the four levers for connection
to the frame integrated with the brush motor is cou-
pled.
The electrical actuator (M5), with limit microswitches,
lifts and lowers the deck. The operating and washing
pressure depends on the weight of the deck. The ac-
tuator also permits the extra pressure function. Extra
pressure is selected via the button on the dashboard.
Brush rotation occurs only when the brush motor
(M1) is driven by the function electronic board follow-
ing activation of the accelerator pedal microswitch.
The brush system uses the solution to wash the floor.
In case of brush motor overload, a safety system stops
the brushes after about one minute of continuous
overload.
If the overload takes place when the extra pressure
function is on, the system automatically turns the ex-
tra pressure function off. If the overload persists, the
brush stops.
The overload is detected by monitoring the current
flow sum on the brush motor. The current is mea
-
sured by verifying the voltage drop through the brush
system fuse (F1). If the voltage drop reaches the val-
ue stored in the parameter “VS2” (default = 70 mV),
the 3 battery LEDs flash at the same time, and if the
overload persists, the brush motor will stop following
a delay which varies on the basis of the extent of the
overload.
To start scrubbing again after a brush stop due to
overload, turn the machine off. Then restart the ma-
chine by inserting the ignition key.
To work properly, the brush motor (M1) needs the fol-
lowing:
•
Driver’s seat microswitch closed
•
Brush function on
•
Forward pedal pressed
•
Battery level not critical, display icon without
segments and flashing outline.
Brush Engagement and Release System
To easily and successfully engage and disengage the
brush from the deck hub, there is a function electronic
board control system which adjusts the brush motor
speed and stop.
Wiring Diagram
J8.5
J2.2
J2.1
BR -
BR+
B - Electronic board power supply -
J8.10
DECK configurator return
Deck actuator power supply -/+
Deck actuator power /-
Brush motor -
Brush motor +
Power supply for DECK configurator
FUNCTION
ELECTRONIC
BOARD (EB1)
BRUSH
MOTOR (M1)
DECK
ACTUATOR (M5)
B+
Electronic board power
Figure 1
