125Service Manual – SC401, SCRUBTEC 34430 - Solution SystemFunctional DescriptionThe solution system supplies water and detergent to the brush when cleaning the floor. The water tank isalso the main machine body There is a manual valve on the right side of the tank to close the water supplywhenever maintenance must be performed on the machine. The solution flows from the tank to the tap,through the filter and solenoid valve (EV1) and then to the brush deck.The detergent pump (M4), present on Detergent systems, controls the flow of detergent from the bottlewhich is then transported to the flow 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 compartmentThe solution flow is regulated by various timed ON / OFF cycles, according to the water flow rate regulation(0 - 3)The detergent pump follow different ON / OFF timings depending on flow rate set and detergent percentagesettingThe 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 LEDPre WettedTo avoid marks or lines on delicate floors, use the “pre wetted” function, which dampens the brush beforestarting the operationWhen the Brush and the Vacuum system are disabled, if the Main button and the Solution buttonare pressed together for more than 1 sec , the Solution Valve (EV1) output is powered at 24Vdc untilthe Main button and/or the Solution button are released During output enabling, all otherinputs are inhibited During output enabling the Solution button LED’s are blinking
