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ErrorLib — Industrial Fault Code Library

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64

Input Supply Status

Vacon · NX Liquid-Cooled Drive

What does 64 mean?

This fault indicates issues with the drive's main input supply. It can be triggered if the main input switch is open, or if the Main Circuit Breaker (MCB) feedback signal is missing after the settled time defined by parameter P2.4.6 (Breaker Ack Time) has elapsed.

Common Causes

  • Input power supply voltage outside normal operating range.
  • Loss of one or more phases of the AC input supply.
  • Input voltage stability issues.
  • Supply fuse blown or circuit breaker tripped.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the main power switch supplying the drive and ensure it is in the closed (ON) position.

  2. 2

    Check the functionality of the Main Circuit Breaker (MCB) and verify its trip status.

  3. 3

    Verify the signal wiring for the MCB feedback input, ensuring proper connection and signal integrity.

  4. 4

    Review parameter P2.4.6 (Breaker Ack Time) to ensure it is set appropriately for the MCB's feedback delay.

Browse all codes in this manual (52)
Verified technical data. Last updated: April 2026

Related Faults

1Overcurrent10Input Phase Failure12Brake Chopper Supervision Fault
Source: Vacon NX Liquid-Cooled Drive
Open Manual (Page 157)Search more codes in this manual