Service Manual

Workman GTX Electric Lithium Page 3B -- 15 Electrical System
Fault
ID
Service ActionsAdditional NotesFault Condition /
Circuit Description
Controll
er(s)
Affected
Fault Title
P0A3C Traction Motor
Controller --
High Temp
Warning
SC2 The measured FET
temperature
exceeds the design
limit. When the
overtemp region is
entered, motor
current is limited on
a linear basis until
the absolute over
temp value is
reached.
FET temperature
exceeds 75 ºC
(Sevcon).
Traction
performance is
limited.
1) Reduce ground speed.
2) Check for mechanical
resistance in the wheels that
would make the motors work
harder than necessary.
P0A44 Traction Motor
Speed -- High
SC2 Machine is operating
above the allowed
max speed which
should not be
possible.
Ground speed is
above the
programmed max
speed of the
machine.
Traction is disabled.
1) Check the wiring of the
speed sensors.
2) Check the supply voltage
to the speed sensor.
P0A54 Traction
Controller --
Over Current
SC2 The motor was
commanding more
current than the
hardware and
software allows.
Current draw from
motors exceeds
hardware and
software limits.
Traction is disabled.
1) Cycle the key switch.
2) Report incident to Toro
TAC if fault continues. This
should not occur under the
desired machine design.
P0A80 Battery --
Internal
Hardware
Failure
SC1 A hardware
component internal
to a battery has
failed.
Battery contactor is
opened.
Oneormoreofthebatteries
is likely damaged. Contact an
Authorized Toro Distributor
for assistance.
P0AA1 Battery
Contactor --
Stuck Closed
SC1 The contactor is
measured to be
closed when it
should be open.
Current draw
detected from the
BMS when there
shouldn’t be.
Battery contactor is
open.
NOTE:Ifit’struly
welded shut, it won’t
open.
The BMS is likely damaged.
Contact an Authorized Toro
Distributor for assistance.
P0AA2 Battery
Contactor --
Stuck Open
SC1 The contactor is
measured to be
open when it should
be closed.
20% difference in
voltage between the
two sides of the
battery contactor.
Battery contactor is
opened.
The BMS is likely damaged.
Contact an Authorized Toro
Distributor for assistance.
Electrical
System