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ASDA-A3

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Troubleshooting

AL086 Regenerative resistor overload

Condition: excessive energy in the capacitor of the servo drive is released to the

regenerative resistor causing overload of the resistor.

Cause:

Trigger condition

and cause

1. Incorrect selection of the regenerative resistor or no connection to an external

regenerative resistor.

2. Incorrect parameter settings for P1.052 and P1.053.

3. Other energy (such as interference) is input to the servo drive or the input

voltage is higher than the allowable rated voltage.

4. Malfunction of the servo drive hardware.

1. Check the connection for the regenerative resistor and correctly set the values

of P1.052 and P1.053.

2. Reassess whether the regenerative energy exceeds the value of P1.053.

If so, replace the regenerative resistor with a regenerative resistor that has a

higher capacity.

3. Use a voltmeter to measure if the input voltage from the power supply is within

the allowable rated voltage (refer to Appendix A Specifications). If the input

Checking method

voltage exceeds the rated range, remove the interference source.

and corrective action 4. Measure the voltage between P3 and terminals. If it does not match the

displayed DC Bus voltage when you enter the monitoring code 14 to P0.002,

the servo drive may be malfunctioning. Send your servo drive back to the

distributor or contact Delta.

5. If you took the preceding actions and the issue persists, use a scope with a

differential probe to measure whether the input voltage has high-frequency

signal interference. If there is interference, remove the interference source,

How to clear the

alarm?

and use the right voltage source or connect the regulator in series.

DI.ARST

14

AL087 Hardware device error

Trigger condition

and cause

Hardware device is in error.

Checking method Send your servo drive back to the distributor or contact Delta.

and corrective action

How to clear the

alarm?

N/A

AL088 Servo function operational alarm

Trigger condition

and cause

Condition: too many motor control functions on the servo drive are enabled.

Cause: servo function operational alarm.

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