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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.

25

Microprocessor watchdog fault

Vacon · NX Liquid-Cooled Drive

What does 25 mean?

A microprocessor watchdog fault indicates faulty operation or a component failure within the drive's control unit. Subcode S1 points to a CPU watchdog timer issue, while S2 indicates an ASIC reset.

Common Causes

  • Microprocessor has encountered an unrecoverable error.
  • Internal hardware fault in the main control board.
  • Software crash or watchdog timeout.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the fault and restart the drive.

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 154)Search more codes in this manual