QSI manual is now a hefty 468 pages, you can download it at http://qsindustries.com/manuals/full%20dcc%20manual.pdfThanks PJ,
pages 29-31 cover the various F9 shutdown and F6 startup modes.
page 32 covers the quick system volume increase/decrease.
You have answered all points for me.
Upon reading the QSI manual I am aware that I misquoted the F10 status report. It should have been "ID3, Disconnect".
I shall endeavour to use this information on Friday to reprogram 4001.
I shall report back on the outcome.