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ErrorLib — Industrial Fault Code Library

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34

CAN bus communication

Vacon · NX Liquid-Cooled Drive

What does 34 mean?

A message sent on the CAN bus was not acknowledged by another device. This typically indicates a communication problem between devices on the bus.

Common Causes

  • CAN bus communication error (e.g., bus off).
  • No acknowledgement from CAN network devices.
  • Incorrect CAN bus termination or cabling.
  • Node ID conflict on the CAN network.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure that there is at least one other active device physically present on the CAN bus.

  2. 2

    Verify that all devices on the CAN bus have identical communication configuration, such as baud rate and node ID settings.

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

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1Overcurrent10Input Phase Failure12Brake Chopper Supervision Fault
Source: Vacon NX Liquid-Cooled Drive
Open Manual (Page 154)Search more codes in this manual