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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.

Err4

CPU Fault 1

Schindler · Altivar 212 Variable Frequency Drive

What does Err4 mean?

This fault indicates an inoperable condition of the main control board CPU (CPU fault 1) within the Altivar 212 drive, suggesting a critical hardware failure that halts drive operation.

Common Causes

  • The main control board CPU is inoperable.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Contact Schneider Electric to repair the drive.

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 181)Search more codes in this manual