hi guys im pretty new to this.... I work with air conditioning mainly and have been asked to look at a supermarket multi system, its pretty daunting!

I have a problem with one of the freezers iceing up, all the thermistors seem fine, the only thing that i can think of is the expansion valve, its a danfoss akv 10-3, its icey straight after the valve which makes me think its faulty?? Is there any way that the valve can be adjusted or will I have to replace it?? any help much appriciated!!!

thanks
davep