Cause : AI2 LOSS comes when analog input AI2 signal has fallen below limit defined by parameter 3022 AI2 FAULT LIMIT.

The F0008 code you're referring to is a generic fault code for loss of an analog input signal This indicates that the drive isn't receiving a valid signal from a specific analog input terminal.

1. Check fault function parameter settings.
2. Check for proper analog control signal levels.
3. Check connections.