Nilfisk-Advance CS7000 Fuel Cell EcoFlex, Service Manual

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Electrical System 105 Service Manual – CS7000
Circuit Protection
Circuit protection is accomplished with both fuses and circuit breakers. There are 2 large fuses. F1 is a 400
amp fuse that provides “complete machine” protection. F2 is a 150 amp fuse that protects the motor circuits
for the main broom, scrub motors and vacuum motors.
Switched Power
A key switch (Ignition Switch) is used to provide switched power to the main machine controller but
it carries only a small amount of current. The main machine controller in turn energizes an Auxiliary
Contactor to provide 36 volt high current capacity supply to many circuits. The main machine controller also
energizes an Auxiliary Relay which provides a 12 volt power supply to itself. The main machine controller
then uses this 12 volts to switch out to various circuits like the Ignition output to the engine system.
Current Sensors
The CS7000 utilizes 3 hall effect current sensors to report amp draw information for the vacuum motors,
scrub motors and main broom motor to the main machine controller. They work much like an inductive amp
clamp for a digital multi-meter. The motor circuit ground wires run through the “circle loop”. The sensor
“reads” the amperage and converts it to a voltage value for the main machine controller to “read”. With no
current flow, the sensors report 2.5 volts. As current increases the voltage increases. (Provided the sensors
are installed correctly. If they are installed “backwards” the voltage will drop with increased current).
Current Sensor
Wires pass
through circle
“Tape Tab” must
point toward
Battery Positive
42 Volt Alternator (Generator)
The 42 volt generator provides the electrical power needed to operate the machine and to recharge the 36
volt battery pack. It is belt driven by a pulley located at the rear of the engine (Right side of machine).
Lighting
All headlights, curb light, taillights and turn lights are controlled by the main machine controller. Head
lights are standard. The curb light and turn lights are optional See the Options and Accessories chapter for
more information on curb lights and turn lights.