Danfoss · VLT HVAC Drive FC 102
A fitted option card or module is not compatible or operational with the current control board hardware or software version in the frequency converter. This prevents the unit from functioning correctly and requires contacting support for resolution. Incorrect component pairings can lead to system instability.
Click steps to track your progress.
Power down the drive, remove the option card, and reseat it firmly into its designated slot; power up and retest functionality.
Check the drive's control board firmware version (e.g., P15-00) and the option card's compatibility matrix against the manufacturer's documentation.
If multiple option cards are installed, remove them one by one to isolate the incompatible or faulty card.
Consult the drive's manual for specific compatibility requirements between the installed option card and the main control board firmware version.