On setting up and priming, the centrifugal head omitted a humming noise and when touched you could feel a high frequency vibration.
The head was replaced and the new head was okay. This omitted it being a hardware (drive unit) issue.
Liva Nova Revolution Centrifugal head
Lot/Batch No: 1912170013
Disposable replaced. Sent back to manufacturer and reported on internal QMS.