Danfoss · VLT HVAC Drive FC 102
One or more option modules (e.g., fieldbus cards, I/O extensions) have either been added or removed since the last power-down cycle. The drive detects a change in its hardware configuration and requires user confirmation. This alarm serves as a notification and requires a reset to ensure the change was intentional before proceeding.
Click steps to track your progress.
1. Power down the drive, then visually inspect and re-seat all installed option modules firmly into their respective slots.
2. Verify the drive's parameter P14-22 (Auto Configuration) is set to '1' (Enable) to detect module changes.
3. If an option module was recently added or removed, confirm its presence or absence matches the intended configuration.
4. Power cycle the frequency converter and observe if the fault reoccurs; if so, test with a known good option module.