Okuma Alarm C-3151 – MCS Inverter Unit Fault

Okuma Alarm C-3151 indicates a fatal error in the MCS inverter unit while the control system is executing internal processes. This alarm usually means the inverter or related control electronics reported a serious fault and the machine stopped to prevent damage. The issue may be related to the inverter unit, power electronics, communication errors, or internal control problems, and the drive system should be inspected.