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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.

5

Charging Switch Open

Vacon · NX All-in-One Application

What does 5 mean?

This fault indicates that the internal charging switch is detected as open when a START command is issued to the drive. This could be due to an operational malfunction or a defective component within the charging circuit, preventing the DC bus from charging properly.

Common Causes

  • The contactor or breaker for charging the DC bus has failed to close.
  • A signal from the charging circuit is unexpectedly open.
  • Interlock preventing charging due to an unsafe condition.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the fault through the control panel.

  2. 2

    Attempt to restart the drive.

Browse all codes in this manual (42)
Verified technical data. Last updated: April 2026

Related Faults

1Overcurrent10Input line supervision11Output phase supervision
Source: Vacon NX All-in-One Application
Open Manual (Page 371)Search more codes in this manual