Air con only works for 5 minutes then goes warm on my jaguar x type 2.0 petrol 2003

Hi, it sounds like an undercharged condition.Locate your ac compressor and watch the end of the pump shaft(clutch).If the clutch isnt turning while it is blowing warm,check the pressure in the system.Low charge will cause the clutch to disengage.It does this because the pressure switch isnt meeting the requirments to close the circuit to the compressor clutch..Good Luck!!!Dont forget to rate my answer...Thank You