Scrub System, Disc 77Service Manual – SC500
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
oor. 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) lifts and lowers the deck.
The operating and washing pressure depends on the
weight of the deck. The actuator also permits the ex-
tra 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 Board following acti-
vation of the paddle.
The brush system uses the solution to wash the oor.
In case of brush motor overload, a safety system stops
the brush to prevent 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
ow on the brush motor. If the motor current reaches
the value stored in the parameter “VS1” and the over-
load 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:
• Brush function on
• Forward paddle pressed
• Battery level not in critical condition with ash-
ing segments.
Brush Release System
In order to release the brush from its hub, the brush
motor starts up and then stops rapidly. The brush’s
inertia thus causes it to disengage from the hub.
Wiring Diagram
M5
J1.4
J1.3
Deck actuator power supply +/-
Deck actuator power supply -/+
BRUSH DECK
ACTUATOR
MOTOR (M5)
M1
BR-
BR+
Brush motor -
Brush motor +
B-
B+
FUNCTION
ELECTRONIC
BOARD (EB1)
BRUSH
MOTOR (M1)
Electronic board power supply +
Electronic board power supply -
Figure 1
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