Nilfisk-Advance Advance SC750 ST

Service Manual: SC750, SC800, SC 750 ST, SC800 ST
Form Number 56043150 Page 43
J3 Connector
Pin # Circuit Descripon Value Comments
Used
on Non
ST or ST
1 Baery “+“ lead 24.0v With vacuum motor running Both
2 Baery “-“ lead 0.5mV With vacuum motor running Both
3 Brush Remove contactor output 28mV When energized. Otherwise 24V Non ST
4 On-Board Charger Interlock input
(input = key switch voltage when
on-board baery charger is not
plugged into AC outlet, oats
open when on-board charger is
plugged in.)
25V Key on and Charger NOT plugged in.
When Charger is plugged in, drops to
116mV
Both
5 Reverse Direcon input from
Speed Controller (input = GND
when moving in reverse)
2mV
23V
In Reverse.
In Neutral or Forward
Both
6 Fwd/Reverse input from Speed
Controller (input = GND when
moving in forward or reverse)
4mV
24.1V
In Forward or Reverse
In Neutral
Both
7 Speed Controller Status input
(input pulses between B+ and
GND to indicate error status from
Speed Controller)
121mV Normal (No faults). Voltage pulses
when fault is present.
Both
8 Baery “+“ lead 24.0v With vacuum motor running Both
9 Not used Both
10 Not used Both
11 Soluon Solenoid Valve winding 116mV When energized (Hold soluon but-
ton down)
Both
12 Vacuum Contactor winding 4.9V When energized, voltage inially
drops to 90mV then seles at 4.9v.
This is due to 100% “on” me at rst
to pull in the contactor, which is then
reduced to 80% to hold it in.
Both
13 Brush Motor Contactor winding 4.9V When energized, voltage inially
drops to 90mV then seles at 4.9v.
This is due to 100% “on” me at rst
to pull in the contactor, which is then
reduced to 80% to hold it in.
Both
14 Key Switch input (input = B+ volt-
age when key is turned on)
24.9V Key On or O with on-board baery
charger
Both