Hello, have at a Geodyna 5501 the problem that the rim diameter is very often detected an inch too small, i.e. 14″ instead of 15″ or 15″ instead of 16″. If I turn the gear at the poti a point to the left or right, error message E3 is issued, i.e. the resting position is wrong. So that seems to be too much. Does anyone have a service instruction in which the setting is described? The instruction also does not have to be to a 5501, all models with the inner T Astarm should fit.