Hi have a customer with a freezer cabinet in his commercial kitchen,while doing a service check on the cabinets i noticed that a single door freezer cabinet had a note that it had been changed to r22 this was done many years ago,the makers spec says r404a the cabinet is working fine and given that the kitchen is very warm at the moment enough to say i am surprised,the question is can i service this machine ie remove the r22 if a compressor change is needed in the future or does the cabinet have to be scrapped,on another note this compressor runs very cool and i thought the compressor would be running warm any advise welcolmed