Nilfisk-Advance Advance SC750 ST

Service Manual: SC750, SC800, SC 750 ST, SC800 ST
Form Number 56043150 Page 41
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Shop Measurements – Main Machine Controller
The following tables contain some “real world” shop voltage measurements to help you recognize what “normal” looks
like. All voltage values were measured with the black (Negave) voltmeter lead connected to the main baery negave
terminal unless otherwise specied. (Non ST = SC750 and SC800 models. ST = SC750 ST and SC800 ST models)
J1 Connector
Pin # Circuit Descripon Value Comments
Used
on Non
ST or ST
1 Chemical Pump “+” output Non ST
2 Not used Both
3 Chemical Pump “-“ output Non ST
4 Brush Head Actuator motor “+”
output
24v
down
-24v up
With red lead at pin #4 and black
lead at pin #5
Both
5 Brush Head Actuator motor “-“
output
Both
6 Not used Both
7 Not used Both
8 Baery Negave (Ground) 0.5mV With vacuum motor running Both
9 Not used Both
10 Not used Both