Cause : Microcontroller watchdog fault comes when the microcontroller's watchdog timer within the Danfoss Vacon 20 drive. The watchdog timer is a mechanism used to monitor the operation of the microcontroller. If the microcontroller fails to reset the watchdog timer within a specified interval, it can trigger a watchdog fault.
Here's how you can address this issue:
-
Power Cycle the Drive: Start by power cycling the drive. Turn it off, wait for a few minutes, and then turn it back on. This may clear the fault if it was caused by a transient issue.
-
Check for Firmware Updates: Ensure that the drive's firmware is up to date. Firmware updates may include fixes for known issues, including watchdog faults. Consult the manufacturer's documentation for instructions on how to update the firmware.
-
Inspect for Electrical Issues: Check the electrical connections and power supply to the drive. Loose connections or voltage fluctuations can sometimes cause watchdog faults. Ensure that the power supply is stable and within the specified voltage range.
