Climatronic error J255

Hi all. 
 

long time lurker, first time poster. 
 

my 2012 superb that I purchased last year started having an issue with the AC, it wouldn’t blow cold air and it was making a hissing noise under the dash which eventually stopped. 
 

I had my car in for a service yesterday and he provided me with the scan results. There are 2 errors relating to the climatronic control module with error number j225, image attached. 
 

I did have the AC looked at just before Christmas which confirmed that the gas was fine, but he insisted that the compressor needs replacing as this was a common fault. But wanted it checked out first. 
 

anyone seen this one before or could shed some light on what the issue is or part that needs replacing? 
 

cheers!