oC3 fault in Emotron VSB Drive

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oC3 fault indicates Decel overcurrent. This means the inverter's output current has exceeded the safe threshold during the motor's deceleration phase. Possible Causes: 1: Output short circuit (phase-to-phase short circuit or output ground short circuit). 2: Load inertia is too big. 3: Decel time is too short. 4: Input voltage is too low. Solutions: 1: Check motor connection and output ground impedance. 2: Use dynamic brake. 3: Prolong the Decel time. 4: Check power grid voltage.

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