You may have a problem with your air compressor.
You may also get 1 that says “no height changes while system cools” (something like that)
Our 322 has started doing same and gave a fault C1A20-64 on diagnostics.
So for me it’s a compressor rebuild and new desiccant and filters.
There could be a few faults that show that message not sure, so you really need to pull the fault code.
J