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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.

2561

Control card replacement required

Danfoss · VLT AutomationDrive FC 301/302

What does 2561 mean?

An internal issue or critical incompatibility necessitates the replacement of the control card. This fault indicates a problem beyond typical troubleshooting, often related to hardware failure.

Common Causes

  • Catastrophic failure of a critical component on the control card (e.g., main processor, memory, power regulator).
  • Unrecoverable internal bus communication failure that cannot be resolved by firmware updates or resets.
  • Severe damage to the control card due to voltage spikes, short circuits, or physical impact.
  • Persistent uncorrectable memory errors indicating a faulty RAM or Flash module.
  • Unrecoverable firmware corruption preventing the control card from booting up properly.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Record all existing drive parameters for backup, if accessible via LCP or communication port.

  2. 2

    Confirm the exact part number and revision of the control card that needs replacement.

  3. 3

    Order a new control card with the correct part number and hardware revision.

  4. 4

    Safely remove all power from the drive (L1, L2, L3 mains and control power) before replacing the card.

  5. 5

    Install the new control card, then load backed-up parameters and the correct firmware version.

  6. 6

    Perform a functional test of the drive and connected motor after card replacement.

Browse all codes in this manual (66)
Verified technical data. Last updated: April 2026

Related Faults

#14Earth (ground) fault#32Motor phase W missing#36Mains failure
Source: Danfoss VLT AutomationDrive FC 301/302
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