[Link: awe-europe.com]

Document is listed on the right hand side. Although, I don't know why you are not using 232. The command structure looks like the format the RXA (Aventage) series uses. I am surprised c4 doesn't have an RX-3000 or the like in their db. I would also try the RXA driver from C4 first to save yourself some time.

If you must use IR, and the c4 RXA RXV do not work, the Yamaha short to long generator is also on that page.

Pro tip: when entering the short code into the box, use a space instead of the dash.