Err04 fault in Emotron VS Series Drive

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Err04 fault indicates Accel overvoltage. This means the drive's internal DC bus voltage has risen above the maximum safe limit during motor acceleration. Possible Causes: 1: The input voltage is too high. 2: An external force drives the motor during acceleration. 3: The acceleration time is too short. 4: The braking unit and braking resistor are not installed. Solutions: 1: Adjust the voltage to normal range. 2: Cancel the external force or install a braking resistor. 3: Increase the acceleration time. 4: Install the braking unit and braking resistor.

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