DANA SPICER PACCAR 220ev, Руководство по устранению неисправностей

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General Information
Vehicle System Overview
This section provides a brief overview of the main
systems on the vehicle. More detailed information is
provided in the specific section for each system,
which can be found on the page indicated.
Additional information is also available in the vehicle
service manual.
ESS … page 19
The Energy Storage System (ESS) is the vehicle
battery pack. It includes the Battery Management
System (BMS) and heating and cooling circuits to
help maintain the proper operating temperature in
cold weather.
Charging System … page 161
The charging system converts electrical energy input
to charge the ESS. It can accept either alternating
current (AC) or direct current (DC) input. The
vehicle is charged using a charger that is attached to
the electrical power grid. The charger is referred to
in this manual as an EVSE (Electric Vehicle Supply
Equipment).
Propulsion System … page 270
The propulsion system converts electrical energy
from the ESS into mechanical energy to propel the
truck. It consists of an electric motor and a Traction
inverter. The propulsion system is available in two
configurations medium duty and heavy duty.
Brake System
… page 325
The brake system is responsible for stopping the
vehicle. The brakes are operated by compressed air
supplied by an onboard compressor.
DCDC System … page 417
The DCDC system accepts high voltage (HV) input
from the ESS and converts it to 24V low voltage (LV)
to charge the two LV batteries, which power the 12V
and 24V equipment throughout the vehicle.
Low Voltage Distribution System … page 465
The low voltage distribution system distributes 12V
and 24V power throughout the vehicle to power
onboard equipment and accessories.
Power Steering System … page 480
The power steering system is an electro-hydraulic
system which produces supplemental steering force
to assist the driver in steering the vehicle.
HVAC System … page 522
The Heating, Ventilation and Air Conditioning
(HVAC) system provides heating, cooling, and
ventilation to the driver cab.
VCU-HMI System
… page 602
The Vehicle Control Unit (VCU) is the main
processing unit which monitors and controls most of
the systems and equipment on the vehicle. It
interfaces with other equipment either through the
CAN network or by means of dedicated low-voltage
signals. The Human-Machine Interface (HMI)
provides a communication interface between the
VCU and the driver.
Powertrain Cooling System … page 671
The cooling system helps to maintain the proper
operating temperature for the equipment connected
to the cooling circuit. It consists of a cooling loop,
radiator, pump, and fans.
Telemetry System … page 690
The telemetry system collects and transmits
operational data from the various vehicle systems to
remote servers where they can be accessed by
operators for monitoring purposes.
ePTO System … page 700
The electric power take-off (ePTO) system provides
an electrical power output which can be used to
operate aftermarket onboard accessories.
Is a separate vehicle controller that comprises two
major function. That of the supervisory controller,
(FSVCU) where its function is to monitor vehicle
systems on CAN-A, CAN-B, CAN-C, and CAN-D.
Should the selected devices perform an unsafe
function the supervisory controller provides a safe
shutdown sequence. The also functions
as a charge controller, managing the charging
process when the vehicle is connected to an EVSE.