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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

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.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

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Source: Schindler Altivar 212 Variable Frequency Drive
Open Manual (Page 184)Search more codes in this manual