Error code on HUST controller

[wateague]

Does anyone know what ERROR 02 .F AXIS ERR mean.
I just replaced the Z axis ball screw. It worked great for a day and a half. 
Tried everything I could think of. shut everything down reprogrammed run the previous tool path ok.
Today it gets the same error, then I can’t get it to even start a tool path 

I have the Axiom Elite 8 with HUST CONTROLLER. 
This machine has been used been used very much.
a lot has gone wrong with it in the past. 
I have another CNC that I depend on. 

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[wateague]

I fixed my problem. 
My Axiom won’t run a Profile tool path with a Tapered Ball Nose bit.
My Avid ran these parts okay but when I saved it to run on my Axiom it would not.
I finally saved the tool path putting in a V60 bit in the program but keeping the Tapered Ball Nose in the chuck. I achieved the desired results.