125Service Manual – SC401, SCRUBTEC 344
30 - Solution System
Functional Description
The solution system supplies water and detergent to the brush when cleaning the oor. The water tank is
also the main machine body. There is a manual valve on the right side of the tank to close the water supply
whenever maintenance must be performed on the machine. The solution ows from the tank to the tap,
through the lter and solenoid valve (EV1) and then to the brush deck.
The detergent pump (M4), present on Detergent systems, controls the ow of detergent from the bottle
which is then transported to the ow in the main tube just before the solution enters the brush deck (see
“Adjusting of detergent concentration in the washing water” paragraph).
Located centrally, below the tank, there is also a hole for draining any liquid in the battery compartment.
The solution ow is regulated by various timed ON / OFF cycles, according to the water ow rate regulation
(0 - 3)
The detergent pump follow different ON / OFF timings depending on ow rate set and detergent percentage
setting.
The solenoid valve and detergent pump operate only with the following inputs/conditions:
• Brush function on
• Operator’s presence sensors activated
• Battery level not in condition with blinking LED.
Pre Wetted
To avoid marks or lines on delicate oors, use the “pre wetted” function, which dampens the brush before
starting the operation.
When the Brush and the Vacuum system are disabled, if the Main button
and the Solution button
are pressed together for more than 1 sec., the Solution Valve (EV1) output is powered at 24Vdc until
the Main button
and/or the Solution button are released. During output enabling, all other
inputs are inhibited. During output enabling the Solution button LED’s are blinking.
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