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: March 2026

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Source: Vacon NX Liquid-Cooled Drive