It is normal for the OL3 error to appear on split pocket machines using the F7 Drive. We intentionally limit the torque output of the drive and at the same time ask for a given acceleration rate. The OL3 error is indicating that the torque limit is exceeded and the drive will slow the acceleration rate automatically to remain under the torque limit. This error is really for information only since we want the drive to respond in this way. The machine will continue to work normally with an OL3 error.