Sounds more like an auxiliary fan issue. Not sure how that car is setup, but on my old BMW 540i there is a an Aux fan that sits in front of the radiator (maybe back, don't recall) that would simulate motion and always run air through the AC related coils. If that fan malfunctioned, the car would do exactly what that one is doing, except for the revving part.... Could be a Aux fan clutch then maybe. Not sure if this all applies to your car, but some cars work like that. To me, it also sounds like the compressor and charge are fine.