Overcurrent faults have been seen many times over the years of support. The fault is one of two potential defective components. It is either a defective servo drive, or a defective power cable. Since there are multiple drives of the same model in the saw, I would recommend swapping the drive with another working one in the saw. IF the fault moves to another axis, that tells you the drive is defective and needs to be replaced. IF the fault stays on the same axis, then it tells you the power cable is defective.