For Anyone reading this with the same problem in this printer the actual error comes from the two printer heads being measure not in the right order.
As you can see in the video posted by mrGokhan the first printer head to be measure is the printer head B, and then it measures the Printer head A. that means that the relative distance is in fact negative and therefore giving a non realistic values.
The solution is to manually switch the printer head B up, so it starts to measure the printer A first. Why this is happening, I am not sure.