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: March 2026

Related Faults

E-21CPU Error 2 FaultE-18VIA Signal FaultEPH0Output Phase Loss Fault
Source: Schindler Altivar 212 Variable Frequency Drive
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