Scrub System, Disc
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Service Manual – SC3000
Scrub System, Disc
Functional Description
The disc brush system can be started by the operator.
The disc brushes turn in opposite directions towards the centre of the header.
The rotating brush system cleans the surface of the floor. The deck, where brushes suitable for cleaning the
particular type of floor are installed, is the main part of the brush system.
The brush deck is mounted on a “magic deck” pantograph system with an electrical actuator and gas spring.
The “magic deck” system lets the brush deck traverse sideways and the steering system turn thanks to a rack.
The “magic deck” system also traverses the deck to the side if it collides with an obstacle.
The electrical actuator, with limit microswitches, lifts and lowers the deck. The operating and washing pres
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sure depends on the weight of the deck. The actuator and gas spring provide extra pressure function. The extra
pressure function can be selected with the specific button on the dashboard.
The brushes rotate when the brush motors are activated by the function electronic board when the pedal is
pressed.
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 over
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load. The overload is shown by the three battery warning leds flashing simultaneously.
The overload is detected monitoring the sum of current flow on the motors. The current is measured by a volt
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age drop verification across the brush system fuse (F1). If the voltage drop become over the value stored in the
“VS2” parameter (default = 70 mV), the 3 battery leds start flashing simultaneously and if the overload persist,
after a variable delay depending on the overload amount, the motors will stop.
If the overload takes place when the extra pressure function is on, the system automatically turns the extra
pressure function off. If the overload persists, the brushes stop.
To start scrubbing again after a brush/pad-holder stop due to overload, stop the machine by turning the igni
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tion key to “0”. Turn on the machine by turning the ignition key to “I”.
In summary, the brush motor running needs the following conditions/inputs:
• Seat microswitch closed
•
Brushes function enabled
• Drive pedal pressed
• Battery level not in red light blinking condition.