I may have missed something but I had assumed a solid red light was correlated to the alarm or emergency stop. I ask because while I have been having issues with the >15mm error, my machine is running with the red light solid.
It did that for a little then froze with no error.
I ran the test function and everything seemed right, but just before this I also had a dual loss of connection that resulted in me trying a blue cat6 cable for the bottom left encoder.