oC1 fault in Emotron VSB Drive

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oC1 fault indicates Accel overcurrent. This means the inverter's output current has exceeded the safe threshold during the motor's acceleration phase. Possible Causes: 1: Torque boost is too big under V/f control. 2: Starting frequency is too high. 3: Accel time is too short. 4: Motor parameters are improperly set. 5: Output short circuit (phase-to-phase short circuit or output ground short circuit). 6: Overload is too heavy. 7: Inappropriate V/f curve under V/f control. 8: Restart the rotating motor. Solutions: 1: Reduce torque boost value. 2: Drop starting frequency. 3: Prolong the Accel time. 4: Set the parameters correctly according to motor nameplate. 5: Check motor connection and output ground impedance. 6: Reduce the load. 7: Set V/f curve correctly. 8: Reduce current limited value or start through speed search.

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