You're using this A5180 line printer; when you bought it, didn't you get documentation as well? If you can't find it, does anyone in your company knows where it is? Can you contact the seller / manufacturer company?
It isn't easy to figure out what those sequences mean, as they could mean anything, from "double size" to "reset all". Do you know what printer does your printer emulate? Some IBM, Epson, ...? Perhaps this could help identifying the sequences.
Google (for "Aliast") returns some hungarian sites; I know a few hungarian words, but those are far from enough to even guess what it is.
What happens if you remove the sequences? Did you try it? What difference can you notice when comparing two printouts?