53

Fieldbus fault

Vacon · 20 Compact

What does 53 mean?

The data connection between the fieldbus Master controller and the fieldbus interface of the drive has been interrupted or broken. This results in a loss of communication with the higher-level control system.

Common Causes

  • Failure to charge the DC bus capacitors to the required voltage.
  • Pre-charge resistor failure or bypass contactor not closing.
  • Line contactor not closed properly or faulty.
  • Input power supply phase missing or voltage too low.
  • Charging circuit fault.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the entire fieldbus installation, including communication cables, termination resistors, and addressing settings, for proper configuration and integrity.

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Verified technical data. Last updated: March 2026

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