Sounds low on refrigerant to me..
You are not getting low fan b/c the trip pressure on that is 20 bar [ 290 psi].. high side
At 80 ambient , you should be close to fan trip..and you know fan circuit is healthy when you jumpered the high pressure sw.
Check the eye site on the reciever/drier... slightly low freon will result in some cooling , but not enough for higher ambient temp and high side will not get to fan trip pressures...
One of the first indicators /complaints of low freon is no aux fan
and some cooling..the fan circuit gets the blame , when in reality it is a low freon charge that is not allowing system to reach the fan trip spec....