'Ram Air door full open' CAN indicate a pack working harder than usual and requiring more air. A few years back I was F/O on a 400 on which both doors were 'full open' in the cruise, which we noted as 'unusual', and shortly thereafter a double pack trip focussed our attention. An immediate reset brought one pack back. It is certainly something to be aware of, and as 'Cough' says, write it up.