A Haynes manual will have enough info for this. You can't get one just anywhere though, it is only sold at the counter in the UK. There is somewhere in the US from which you can order one. Probably do a google search.

That said, will the compressor kick in? How did you determine that it has enough refrigerant? Is the belt in good shape and tight?

There is a sensor that will shut down the compressor if the belt slips.

Give us some more information and we can probably help you here.

Good luck,