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Troubleshooting

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ASDA-A3

14

AL028 Battery voltage error or encoder internal error

Trigger condition

and cause

Condition: battery voltage is higher than the specification (> 3.8V) or the encoder

signal is in error.

Cause:

1. Voltage level of the battery is too high.

2. Encoder internal error.

1. Check if there is a charging circuit. Avoid incorrect wiring. If Pin 1 (5V) of CN2

is connected to BAT+ of the encoder connector, it means the power (5V) of the

servo drive is being charged to the battery.

2. Check if the battery is correctly installed (voltage > 3.8V).

3. Check if the motor is properly grounded. Make sure the ground end (green) of

the power cable is grounded to the servo drive heat sink.

Checking method

and corrective action

4.

Check if the connection for the encoder signal cable is normal. Make sure the

encoder signal cable is separated from the power supply or any high-current

cables to avoid interference.

5. Use shielded cable for the encoder. Pull out the wire mesh and have it

correctly grounded.

If the issue persists, send your servo drive and motor back to the distributor or

contact Delta.

How to clear the

alarm?

Cycle power on the servo drive.

AL029 Gray code error

Trigger condition

and cause

Absolute position within a single revolution is in error.

Checking method Cycle power on the servo drive to operate the motor. Then, check if the alarm

and corrective action occurs again. If the issue persists, replace the encoder.

How to clear the

alarm?

Cycle power on the servo drive.

AL02A Number of revolutions of the encoder is in error

Trigger condition

and cause

Condition: the number of revolutions of the encoder is in error.

Cause: the internal signal of the encoder is abnormal causing error in the number

of revolutions.

Checking method

and corrective action

Send your servo motor back to the distributor or contact Delta.

How to clear the

alarm?

N/A

14-22

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Call +1(800)985-6929 To Order or Order Online At Deltaacdrives.com