Place a
weight of around 40kg in the centre of the scale, note the reading, then move
the weight to the four individual corners.
Are the weight readings for the
corners the same to within +/-0.2 kg? If yes, recalibrate the scales. If no,
check the corner showing the lowest weight for mechanical binds. Check the
motor power cable is free and not causing a mechanical bind as it passes from
the scale section to the non-weighing section. If the problem still exists, open a
support ticket for further assistance.