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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.

64

Input Switch Open

Vacon · NX All-in-One Application

What does 64 mean?

This fault indicates that the drive's main input power switch is open, preventing power from reaching the drive. This typically refers to the external disconnect switch or circuit breaker supplying the drive.

Common Causes

  • An input switch configured to monitor a condition is open.
  • Limit switch or proximity sensor fault (e.g., not activated when expected).
  • Wiring error in the input switch circuit.
  • Switch mechanism failure.
  • External condition preventing switch closure.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the main power switch supplying the drive to ensure it is in the closed (ON) position and making proper contact.

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 377)Search more codes in this manual