The armature current has exceeded either 07.36 Drive DC overcurrent level or 31.44 Armature overcurrent level.
Check:
− That the start-up data in group 99 corresponds to the motor rating plate and that the drive is matching the motor.
− The setting of 07.36 Drive DC overcurrent level and 31.44 Armature overcurrent level.
− The settings of the current controller in group 27 Armature current control.
− The settings of current and torque limits in group 30 Control limits.
− The motor and motor cables.
− All connections in the armature circuit.
− The incoming voltage for synchronizing. If the synchronizing voltage is not taken from the mains directly, but via a synchronizing transformer or the 230 VAC/115 VAC network, check that there is no phase shift between the same phases. Use an oscilloscope to verify.
− The mains/branch fuses.
− The thyristors.
− That there are no contactors opening and closing in the motor cables.
− That there are no power factor correction capacitors or surge absorbers between line reactor and drive.