Nilfisk-Advance Advance SC750 ST

Service Manual: SC750, SC800, SC 750 ST, SC800 ST
Form Number 56043150 Page 50
Battery Charger (Optional On-board Battery Charger)
The baery charger is mounted to the boom of the frame with 4 bolts that are screwed into threaded holes.
1. Cut e straps securing AC power cable.
2. Cut e straps securing electrical connectors.
3. Disconnect electrical connectors.
4. Remove 4 baery charger mounng bolts.
5. Remove charger, thread AC power cable through opening.
6. Reassemble in the reverse order. Tie wiring in same loca-
ons using new e straps.
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Low Voltage Cut Out Threshold Voltages
The On-board intenonally shuts down machine funcons in two stages if the baery voltage drops too low. This is called
“Low Voltage Cut Out”. It is done to preserve the life of the baeries. The rst stage of low voltage cut out shuts o the
scrub funcon by turning o the scrub brush motors and raising the brush deck. It also shuts o the soluon and deter-
gent. The vacuum is sll allowed to run in order to recover soluon that is on the oor. The second stage of low voltage
cut out turns o the vacuum. Wet baeries and Gel baeries use dierent voltage thresholds.
Stage Threshold (volts) Shuts Down
1
Wet Baeries – 20.55 V
Gel Baeries – 21.75 V
Brushes, soluon, detergent and
raises brush deck
2
Wet Baeries – 20.40 V
Gel Baeries – 21.60 V
Vacuum
Battery Run Time
Typical baery run mes may be around 2-4 hours.
Battery Compartment Dimensions
Length = 24.5” (62.23 cm), Width = 14.25” (36.2 cm), Height = 14.25” (36.2 cm)