While training someone to replace me to work on the RW20 Miltonic Centurion, he pushed the estop button mid tool arm change cycle. Now in the diag, the tool arm parked is on 1 which means it is parked, yet it isn't. The MDI button is grey, as I manually cranked the arm full cycle the parked condition stayed at 1, was hoping to reset it. Not sure what else to do?