The remote has to be in 'Stand Alone' mode for the page links to work. Also, unless there is a IR cable to the AC unit, once again it has to be stand alone.
If there is a cable to the AC unit, all the commands (as in the discrete temperature codes) would have to be system macros, once again so as to be able to do the page links.
I've yet to work with a ducted AC system that is (I.R) remote controlled, haven't seen any yet, but I'm sure they're out there!