PVA as support material is a challenge on its own
Read this post for some help on that. [GUIDE] Mecha's Comprehensive Guide to PVA Supports for the H2D
But one thing is for sure, it has to be bone dry to use and be kept that way during printing.
It will otherwise cause clogs everywhere, not only in your nozzle.
I own an H2D since May last year and almost 1200hrs on it with no significant issues at all.