NO COMMUNICATION warning in ABB ACS800 drive indicate cabling problem or hardware malfunction on panel link or panel type not compatible with drive application program version.

1. Check Panel Link connections.
2. Press RESET key.
3. Panel reset may take up to half a minute, please wait.
4. Check panel type and drive application program version.
5. Panel type is printed on panel cover.
6. Application program version is stored in parameter 33.02.