Unico Powerspin HX Centrifuge

Sadly, I couldn’t track down any error code documentation or troubleshooting tips for that model—it’s pretty much out in the wild without support materials. The official manuals cover timing, lid interlocks, fuses, and basic errors—but not this one 

Here’s what I’d do if I were in your shoes:

Check the basics: power cord, fuse, lid switch—just to rule out easy fixes.

Reach out to Unico support (or your distributor)… even if they don’t have it listed, they might know what U20 means—or be able to look it up in a factory manual.