There's abit of guessing here because you didn't really provide all the information necessary for a solid answer.
First you should do a forum search for Makehex and read threads where other people have posted asking similar questions to yours without providing enough information.
Next find and download Makehex.
Read the enclosed ReadMe file for instructions on how to launch it and to find out what it does (very simple).
Edit the NEC1.IRP file and change the device to 209 (that's D1 in decimal). The guessing part comes from picking NEC1 - Yamaha uses NEC1 protocol most of the time, but has also used others. If this is the incorrect protocol you'll have to provide more info or at least one or two learned commands to properly identify the correct protocol.
SAVE the irp file you just changed.
Drag and drop the NEC1.IRP file onto the Makehex program.
Open the new NEC1.hex file which was just created.
Copy the Pronto Hex strings for Functions 192, 194 and 243. Those are the commands you requested above.
If you pay close attention to the makehex instructions you'll find that you can also have it display its device and function numbers in HEX instead of just decimal. That way you can scroll and find C0, C2 annd F3 directly instead of having to first convert them.
Bruno