Solution System 104Service Manual – SC500
Solution System
Functional Description
The solution system supplies water and detergent to
the brush when cleaning the oor. The solution tank
is also the main machine body. There is a manual
valve on the left 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 only on EcoFlex
systems, controls the ow of detergent from the Eco-
Flex tank which is then transported to the ow in the
main tube just before the solution enters the brush
deck.
The EcoFlex system can be selected with the specic
button on the dashboard instrument board (EB3).
The quantity of detergent is dened by the operator
via the buttons on the dashboard instrument board
(EB3).
Solution ow levels 1, 2 and 3 regulate the ow of
detergent solution on the basis of the machine speed
so as to keep the quantity of solution dispensed per
square metre of oor treated constant (for further de-
tails and modications, see the corresponding section
in the chapter Control System).
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:
• Water ow rate regulation (0 - 4)
• Solution tank level
Both the solenoid valve and detergent pump (when
the EcoFlex system is enabled) follow the same tim-
ings.
The solenoid valve and detergent pump operate only
with the following inputs/conditions:
• Brush function on
• Forward paddle pressed
• Battery level not in condition with ashing seg-
ments.
Wiring Diagram
SOLENOID VALVE
(EV1)
DETERGENT PUMP
(M4)
M4
+
-
OUT
J5.3
J5.2
J5.1
J2.2
J2.1
J1.2
J1.1
Detergent pump power supply +
Detergent pump power supply -
Solenoid valve power supply +
Solenoid valve power supply -
Power supply for water level sensor +
Water level sensor return
Power supply for water level sensor -
B-
B+
FUNCTION
ELECTRONIC
BOARD (EB1)
WATER LEVEL
SENSOR (SW1)
Electronic board power supply +
Electronic board power supply -
Figure 1