hi there my d2 has been stood about 2 weeks due to breaking my hand i decided to run the engine today for 10 mins after i switched off the engine and removed the key locked the car as normal i could hear a buzz in short bursts i think it was the compressor ive never heard it before the compressor is about 14 months old could it be semi frozen or something more drastic

That's quite normal.

They're definitely audible. Not sure why it's not been noticed before though..!