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Chapter 10 Troubleshooting|ASDA-B Series
10-4 Revision January 2009
ALE 3 / ALE
: Undervoltage
Potential Cause Checking Method Corrective Actions
The main circuit voltage
is below its minimum
specified value.
Check whether the wiring of main circuit input
voltage is correct.
Reconfirm voltage wiring. Correct
input wiring is needed.
No input voltage at
main circuit.
Use voltmeter to check whether input voltage at
main circuit is normal.
Reconfirm power supply, including
switches.
Power input error.
(Incorrect power input)
Use voltmeter to check whether the input
voltage is within the specified limit.
Use correct power supply or
stabilizing power.
Servo drive hardware is
damaged.
The servo drive hardware is damaged after the
users have used voltmeter to check the input
voltage falls within the rated input voltage.
Please contact your distributor for
assistance or contact with Delta.
ALE 4 / ALE : Z Pulse shift
Potential Cause Checking Method Corrective Actions
Encoder is damage. Check Encoder for the damage. Repair or replace the motor.
Encoder is loose. Examine the Encoder connector. Install the motor again.
ALE 5 / ALE : Regeneration error
When the power is on:
Potential Cause Checking Method Corrective Actions
Servo drive hardware is
damaged.
Please contact your distributor for assistance or contact with Delta.
When the motor is running:
Potential Cause Checking Method Corrective Actions
Regenerative resistor is
not connected.
Check the wiring connection of regenerative
resistor.
Reconnect regenerative resistor.
The transistor for
regeneration is
disabled.
Check if the transistor for regeneration is short-
circuited.
Please contact your distributor for
assistance or contact with Delta.
Parameter setting is in
error.
Confirm the parameter setting and
specifications of regenerative resistor.
Correctly reset parameter again.
Servo drive hardware is
damaged.
Please contact your distributor for assistance or contact with Delta.