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
Switch off the supply voltage to the frequency converter
- 2
If the fault recurs after power cycling, replace the inverter
Verified technical data. Last updated: March 2026
Related Faults
Source: Kone CMXC-022 Frequency Control Upgrade Kit