This unit came out of a closed shop and it had already been pulled, so I have no idea of its operation/function. So that’s why it’s listed for parts.

The ACS550-U1-059A-4 Frequency converter is a high-quality product manufactured by ABB in Sweden. This variable frequency drive is designed to control the speed of motors in industrial automation systems, providing precise and efficient control for a wide range of applications. With its reliable brand reputation and superior technology, the ACS550-U1-059A-4 is a versatile and dependable option for businesses seeking reliable motor control solutions.