A2025 FIRST START Alarm in ABB ACS550 Drive

A2025 FIRST START in the ABB ACS550 Drive is an informational alarm indicating that the drive is performing a First Start evaluation of the connected motor's characteristics. During this process, the drive identifies the motor parameters required for accurate motor control and optimal performance. This alarm normally appears the first time the motor is started after motor parameters have been entered or modified.

A2025 FIRST START Alarm in ABB ACS550 Drive


Unlike a fault, A2025 FIRST START is a normal operating condition and does not indicate a problem with the drive or motor.

Possible Causes

  • Initial startup after drive commissioning.
  • Motor parameters have been entered for the first time.
  • Motor nameplate data has been modified.
  • Parameter 9910 – ID RUN has been configured.
  • Motor Identification (ID) process is being performed.
  • Control mode requires motor parameter evaluation.
  • Drive firmware requires motor characteristic verification.
  • Motor replacement followed by parameter updates.
  • Factory reset followed by recommissioning.
  • Commissioning procedure in progress.

Solutions

  • Allow the First Start evaluation to complete.
  • Do not interrupt the startup process unless necessary.
  • Verify that the motor nameplate data has been entered correctly.
  • Check all values in the motor parameter settings.
  • Ensure the motor is properly connected.
  • Verify that the motor shaft can rotate freely if required by the selected ID Run.
  • Confirm the drive is configured for the correct motor.
  • Refer to Parameter 9910 – ID RUN for the selected motor identification method.
  • Repeat the ID Run if commissioning was interrupted.
  • Reset the alarm after successful commissioning if required.
  • Contact ABB technical support only if the alarm does not clear after a successful First Start evaluation.

Additional Information

The ABB ACS550 uses a First Start evaluation to identify the electrical characteristics of the connected motor. During this process, the drive develops an internal motor model that improves:

  • Speed control.
  • Torque control.
  • Starting performance.
  • Motor protection.
  • Overall drive efficiency.

The A2025 FIRST START alarm typically appears:

  • During the first motor startup after commissioning.
  • After changing motor nameplate parameters.
  • After replacing the motor.
  • After modifying Parameter 9910 – ID RUN.

The type of motor identification performed depends on the setting of Parameter 9910 – ID RUN, which determines how the drive evaluates the motor characteristics.

Unlike a drive fault, A2025 is an informational alarm and normally disappears automatically after the motor evaluation has been completed successfully.

Common Symptoms

  • Drive displays A2025 FIRST START.
  • Alarm appears during the first motor startup.
  • Motor performs an identification sequence.
  • Startup may take slightly longer than normal.
  • Alarm appears after changing motor parameters.
  • Alarm clears automatically after successful evaluation.
  • No abnormal motor operation.
  • Drive operates normally after commissioning.
  • No hardware fault is present.
  • Motor performance improves after the evaluation is completed.

Recommended Troubleshooting Sequence

  1. Verify the motor is correctly connected.
  2. Check all motor nameplate data.
  3. Confirm the settings in Parameter 9910 – ID RUN.
  4. Ensure the motor shaft is free to rotate if required.
  5. Start the drive and allow the First Start evaluation to complete.
  6. Do not interrupt the identification process.
  7. Verify the alarm clears automatically.
  8. Test normal motor operation.
  9. Repeat the ID Run if commissioning was interrupted.
  10. Contact ABB technical support if the alarm remains after successful motor evaluation.

First Start Evaluation Check Table

Check PointAction
Motor connectionVerify correct wiring
Motor nameplate dataConfirm all values are correct
Parameter 9910Verify ID RUN configuration
Motor shaftEnsure free rotation if required
First Start evaluationAllow the process to complete
StartupDo not interrupt the identification process
Alarm statusVerify alarm clears automatically
Motor operationTest normal operation after evaluation
ID RunRepeat if commissioning was interrupted
ABB technical supportContact if the alarm remains after successful evaluation

Preventive Maintenance Tips

  • Enter accurate motor nameplate data before commissioning.
  • Verify all motor parameters after replacing the motor.
  • Select the appropriate ID RUN method for the application.
  • Allow the First Start evaluation to complete without interruption.
  • Ensure the motor is properly wired before startup.
  • Perform recommissioning whenever significant motor parameter changes are made.
  • Keep a backup of verified motor parameter settings.
  • Inspect motor wiring during scheduled maintenance.
  • Record any repeated First Start alarms that do not clear automatically.
  • Follow ABB commissioning procedures for reliable motor identification.

Proper entry of motor nameplate data, correct configuration of Parameter 9910 – ID RUN, and allowing the First Start evaluation to complete without interruption will ensure accurate motor identification, improved speed and torque control, reliable commissioning, and dependable long-term operation of the ABB ACS550 drive.

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