Air con help

[fizzgig656]

Hi all. Ive got an issue on my air con. Now ive check the gas and its up but the compressors not engaging. Ive seen a few coments and thoughts as to possible exspensive reasons but i want to quickly check the basics. Can someone tell me which fuses to check and which relays it uses. Ive check the fuses by the right side of the dash.
Bloody vw dont give you the discription of what fuse does what or really where they are.

Any help please