EP Equipment LIST JX0, Service Manual

Page: 141 / 206

REV. 07/2019
ELECTRICAL SYSTEM
8
128
8.14 Controller Error Message
Electrical faults are mainly caused by electrical
components failure or electrical circuit failure.
Wherein, when some components failures
which may not affect the ON/OFF of control
circuit occur, the instrument won't display fault
code (see Chapter 9 - Troubleshooting); while
the when the components failures which may
affect the ON/OFF of control circuit occur to
the electrical circuit, the controller will alarm for
error, and fault information will be displayed on
the instrument.
8.15.1 Traction Controller
Error Message
Possible cause Fault elimination
Error
Error text
8 WATCHDOG
This is a safety related test. It is
a self-diagnosis test that involves
the logic between master and
supervisor microcontrollers.
This alarm could be caused
by a CAN bus malfunctioning,
which blinds master-supervisor
communication.
17 LOGIC FAILURE #3
A hardware problem in the logic board
due to high currents (overload). An
overcurrent condition is triggered
even if the power bridge is not
driven.
The failure lies in the controller
hardware. Replace the controller
18 LOGIC FAILURE #2
Fault in the hardware section of
the logic board which deals with
voltage feedbacks of motor phases.
The failure lies in the controller
hardware. Replace the controller.
19 LOGIC FAILURE #1
This fault is displayed when the
controller detects an undervoltage
condition at the KEY input.
Undervoltage threshold depends on
the nominal voltage of the controller
"1-Fault can be caused by a key
input signal characterized by pulses
below the undervoltage threshold,
possibly due to external loads like
DC/DC
converters starting-up, relays or
contactors during switching periods,
solenoids energizing or de-energizing.
Consider to remove such loads.
2-If no voltage transient is detected
on the supply line and the alarm
is present every time the key
switches on, the failure probably
lies in the controller hardware.
Replace the logic board.
3-If the alarm occurs during
motor acceleration or when there
is a hydraulic-related request,
check the battery charge, the
battery health and power-cable
connections."