Control System; Functional Description - Nilfisk-Advance Advance SC400 Service Manual

Service Manual – SC400

Control System

Functional Description

The function control is performed with the program
selection knob/rotary switch (SW1), the machine
start-up enabling push button (SW2) (which can be
used simultaneously with the brush levers) and the
solution flow push-button (SW3).
The switch outputs are read by the function electron-
ic board (EB1) which consequently controls the rel-
evant outputs: electromagnetic switch (K1) for brush
motor, relay (K2) for vacuum system motor, while the
solenoid valve (EV1) is activated directly form the
electronic board
The control circuits are protected by the fuse (F3) on
the function electronic board (EB1)
Diagram of Output Activation according to the Position of the Switches (SW1), (SW2)
and (SW3)
Program selection knob
/rotary switch (SW1) enabling push button
settings
O
Solution flow push-
button setting (SW3)
0
1
2
3
Machine start-up
Function electronic
board (EB1) + LED
(SW2) settings (with
electronic board
brush levers)
Pressed/released
Released
Pressed
Released
Pressed
Pressed/released
LED display
The LED electronic board (EBLED) has a set of 3
two-color LEDs The set of 3 LEDs is used to indicate
either battery charge level or water flow level depend-
ing on the current mode of operation:
LEDs to display the
battery charge level
LEDs to set water
flow level
The LED electronic board (EBLED) is driven by the
function electronic board (EB1)
Brush motor (M1) +
solenoid valve (EV1)
(EBLED)
Off
On
On
On
On
On
Symbols
Solenoid valve ON time
(EV1)
1 sec
3 sec
Always ON
Control System
Vacuum system motor
(M2)
Off Off
Off On
On On
Off Off
On Off
Off On
Solenoid valve OFF time
(EV1)
- Always OFF
5 sec
3 sec
-
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