Inside the red led is always solid red. See Appedix B user manual: https://www.victronenergy.com/upload/documents/Manual-EasyPlus-1600-EN-NL-FR-DE-ES.pdf
But how to get rid of it? I am not using the relay. Do I need the Victron VE.direct to USB interface cable to solve this or is it not possible to get rid of this red led at all and will it always be there?