I programmed my TSU9400 to control my Fujistu mini-split AC with IR. The Fujitsu works the same way -- all parameters are sent every time. The protocol is available at
[Link: old.ercoupe.com] You can see how I integrated this into the pronto by looking at my configuration file. (I uploaded the TSU9400 file created in PEP3 last week but it is not yet available in the files section. My TSU7000 version is available but it does not include the prontoscript which maintains state or the IR separate in MyDatabase.
[Link: files.remotecentral.com]The TUS9400 is a much improved version particularly the AC control. If you wait a bit I am sure this newer version will show up.) Basically, I dealt with the millions of choices by selecting only the most common modes (Auto for the most part) and made IR codes for them. However, I plan to modify them by adding a timer since I have a bad habit of leaving the AC on after watching a movie.