25

API Microprocessor Watchdog

Kone · CMXC-022 Frequency Control Upgrade Kit

What does 25 mean?

An internal watchdog error has occurred, specifically related to the API microprocessor within the R&M Materials Handling Frequency Converter. This indicates a software or hardware malfunction within the API section that the watchdog timer failed to detect or reset.

Common Causes

  • Internal watchdog error in the API microprocessor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Switch off the supply voltage to the frequency converter

  2. 2

    If the fault recurs after power cycling, replace the inverter

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Verified technical data. Last updated: March 2026

Related Faults

Source: Kone CMXC-022 Frequency Control Upgrade Kit