Electrical System; Functional Description - Nilfisk-ALTO FLOORTEC R 870 Service Manual

Service Manual – Floortec R 870

Electrical System

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Electrical System

Functional Description

(Floortec R 870 Battery)
The electrical system is basically an electromechanical system at 24Vdc rated voltage in which the main part
of the accessories are powered by relays controlled by switches The timing control of certain accessories and
battery charging, as well as the display of the warning lights, takes place by dashboard electronic board (EB2).
The drive system consists of a driving wheel (M0) driven by the drive system electronic board (EB1)
The battery is connected to the system by means of the ANDERSON POWER connector (C1) Downstream of
the connector, there is a safety fuse (F0). The fuse is sized to activate only in case the power side of the wiring
harness becomes seriously damaged
The on board battery charger (CH) is directly connected on the battery pins for the power side, to connector
(C2) for the inhibition signal. When the battery charger is not connected to the electrical mains, the relay in-
side the battery charger closes the contact between the 2 wires connected to (C2), this contact opens when the
battery charger is connected to the electrical mains. When the battery charger is not installed, the connector
(C2) is closed by a jump connection The connector contacts (C2) are upstream of the ignition key (SW1) and
cut off the power supply to all control section of the electrical system
For further details, see the descriptions of individual sub-systems.
(Floortec R 870 Petrol/LPG)
The electrical system of Petrol/LPG versions is substantially equal to that of the battery versions, the dif-
ference is that the 24V battery pack is replaced by one with lower capacity (2 12Vdc starter batteries) kept
charged by a dynamo and a power diode The system guarantees a correct charging and battery management
on the condition that the rpm of the engine are as constant as possible and that the use of the machine is as
regular as possible, avoiding long stops (not more than 5 minutes) with the engine switched on and the acces-
sories off, and long periods (not more than 10% utilization of the machine) with all accessories turned on to
their maximum load
When the above conditions are not met, if the batteries are under abnormal voltages, a protection system
warns the operator by means of the dashboard electronic board display (EB2) (see Control System chapter)
The dynamotor (M5) also acts as an electric starter for the engine, when powered by the electromagnetic
switch (ES2), which is activated when the ignition switch (SW1) is turned to position II (Ignition).