I have a blue ridge spa (jacuzzi) that is now displaying an error code P52.
I can't find my service booklet to interpret this.
Does anyone know what this means and what steps I should take?
-Chris Ronan

Well now that's a good one and I don't have an answer. I think somewhere in my previous life it might've meant a pressure switch problem. But that's just a guess.

I'd give these guys a ring and see what they say:

http://blueridgespas.com/Content/Contact.html

It is actually a PS2 error code - a pressure switch problem. Try resetting the power and see if that will fix it. If not, you may need to replace the pressure switch.