Atn1

Auto Tune In Process

Schindler · Altivar 212 Variable Frequency Drive

What does Atn1 mean?

This alarm indicates that the Altivar 212 drive is currently executing an auto-tuning procedure. It is a normal operational message and typically clears automatically upon completion of the tuning process.

Common Causes

  • Auto-tuning process is active.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Observe the drive; the message is normal if it disappears after a few seconds upon auto-tuning completion.

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Verified technical data. Last updated: March 2026

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Source: Schindler Altivar 212 Variable Frequency Drive