Nilfisk SC370 43B Wartungshandbuch Seite 32

Service Manual- SC370
30 Solution System
Functional Description
The solution system supplies water to the brush when cleaning the floor. The solution tank is also the main machine
body. The solution flows from the tank to the filter and solenoid valve (EV1) and then to the brush deck.
Press the one-button start on Dashboard (EB1) to turn on the machine, and the solenoid valve is on standby. When
the safety switch is pressed, the control signal is transmitted to Control board (EB2) via port J1-7 (Water) to control
the output of solenoid valve. When the safety switch is released, the output is off. Press the flow increase switch and
flow decrease switch on Dashboard (EB1) to select the solution flow level.
The solution flow is controlled by the on and off time of the solenoid valve. The solenoid valve output and corresponding
LED status are shown in the following table (The LEDs are referring to the solution flow LED indicators. And 1 means
LED on, 0 means LED off):
Status Time on (s)
0 0
1 3
2 4
3 Stay on
Solenoid valve (EV1) can only work when all the following inputs/conditions are met:
•
One-button start on
•
One of the two handle switches is pressed
•
Battery level not in condition with flashing segment
Wiring Diagram
Time off (s) LED1
Stay off 0
3 1
2 1
0 1
LED2 LED3
0 0
0 0
1 0
1 1
30 Solution System 31