Cause : Line side unit faulted comes when the supply unit (or other converter) connected to the inverter unit has generated a fault.

The fault code 7583 in your ABB ACS880 drive indicates a Line Side Unit (LSU) trip. The LSU is a crucial component within the drive responsible for converting incoming AC line power into DC power for the internal inverter section. A trip signifies the LSU has detected an issue and shut down to protect itself and potentially the entire drive system.

The auxiliary code specifies the original fault code in the supply unitcontrol program.