tUN fault in Emotron VSB Drive

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tUN fault indicates Parameter identification failed. This means the drive could not successfully complete the auto-tuning process to determine the motor's electrical characteristics. Possible Causes: 1: Bad motor connection. 2: Identification during rotation of the motor. 3: Bias between motor parameters and their setting is too big. Solutions: 1: Check motor connection. 2: Identification in stationary status of the motor. 3: Set the parameters correctly according to motor nameplate.

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