Lite-On Technology Corp.
Industrial Automation
202
9.2.
Reason for and handling of the alarm
AL001
: Overvoltage
Reason for abnormality
Check for abnormality
Handling of abnormality
The input voltage of the
main circuit exceeds the
allowance.
Measure the input power by the
voltmeter to see if it is consistent
with the specified value.
Use the adequate power supply or
cascade the voltage stabilizer.
Malfunction of the drive
hardware
An alarm occurs despite that the
input power is consistent with the
specified value.
Return it to the dealer or factory
for repair.
Abnormality in the
regeneration system
The regeneration system fails or
the regeneration voltage is too
high.
Check the regeneration system or
mechanism.
AL002
: Overcurrent
Reason for abnormality
Check for abnormality
Handling of abnormality
The output of the drive is
open.
Check the connection of the motor
and drive.
The open circuit issue is solved to
prevent the exposure of conductor.
Abnormality in the motor
wiring
Check the wiring order for the
motor.
The wiring must be conducted
again based on specifications.
Abnormality in the IGBT
Breakdown and abnormality in
the IGBT module
Return it to the dealer or factory
for repair.
Abnormality in the setting
of the control parameter
The control or gain value is set
too high.
The value is reset to the initial
value. It will be set and calibrated
again.
Abnormality in the
control command
Check if the input command is in
a state of high severity.
Modify the input command or turn
on the filter function.
AL003
: Error with motor coupling
Reason for abnormality
Check for abnormality
Handling of abnormality
Encoder damage
An abnormality occurs in the
encoder.
Replace the motor.
Loose encoder connector
The encoder wire is loose.
It is reattached.
Error with motor coupling
The motor does not match the
drive.
Replace the motor.
AL004
: Regeneration error
Reason for abnormality
Check for abnormality
Handling of abnormality
Wrong selection of the
regenerative resistor or no
external regenerative
resistor connected
Check the condition of the
regenerative resistor.
Reset the parameter value. Send
the resistor back to the factory if
the abnormality is unsolved.
The parameter for resistor
capacity not returned to
zero when the
regenerative resistor not
in use
Check the parameter for the
resistor capacity.
The parameter for resistor capacity
must be returned to zero when the
regenerative resistor is not in use.