Electrical System Operation; Battery Charging; Start Process - Toro Greensmaster eFlex 1021 Service Manual

Electrical System Operation

Battery Charging

Start Process

Electrical System: Electrical System Operation
The Greensmaster eFlex machines uses a 48 VDC lithium-ion battery pack to
supply electrical power to the Toro electronic controller (TEC), an electric motor,
and a main contactor. Circuit protection for this 48 VDC system includes 3 fuses
that reside in the wire harness fuse block.
The battery pack provides a 48 VDC supply and includes a battery management
system. The battery management system uses CAN communication with the
TEC and battery charger.
A Toro Electronic Controller (TEC) is used on the eFlex machines to manage
the machine electrical functions. The controller is microprocessor controlled that
senses the condition of various switches (inputs) and directs electrical power to
control appropriate machine functions (outputs) based on the inputs.
The electric motor used on the eFlex is a 48 VDC, brushless, permanent magnet
DC motor. The motor has its own integral controller. The machine TEC provides
motor direction with communication via the CAN-bus system. The motor provides
power for the traction drum and cutting unit when engaged by the operator.
The main contactor exists in the electrical system to connect the battery pack
to the electric motor. The TEC determines when the main contactor should
be engaged.
Control for the components in the electrical system is handled by integral
controllers in the battery management system and electric motor along with
direction from the machine TEC via the CAN-bus system.
The InfoCenter display provides information to the operator during the operation
of the machine, provides electrical system diagnostic assistance for the
technicians, and allows inputs for the adjustable machine settings. The status of
TEC inputs and outputs can be monitored with the InfoCenter display.
The 48 VDC system is an isolated system so that the machine frame is not
used for any ground connections on the eFlex machine. A set of connectors
are included on the machine, which can be used to disconnect the machine
wire harness from the battery pack to prevent unexpected machine operation
when performing service.
Note: Information about individual electrical components in the electrical system
is included in Testing the Electrical Components (page
The eFlex lithium ion battery pack requires regular charging that is provided by
the lithium battery pack charger. The output voltage and current of the charger
are controlled with CAN communication with the battery management system.
Ensure that the charger is connected to the battery pack whenever the machine
is not in use.
Refer to the Operator's Manual for battery charging and battery charger
operation information. Refer to Battery Charger Error and Fault Codes in this
manual for battery charger troubleshooting information.
When the key switch is turned to the START position, the machine electrical
system goes through a wake-up process. The contactor in the battery pack
should click as it is energized followed by the main contactor being energized
(audible click). Both the TEC and electric motor controller will be initialized. Once
the InfoCenter display comes on-line, the key switch can be turned to the RUN
position and the machine will be ready for operation.
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5–21).
Greensmaster ® eFlex 1021
20248SL Rev A