Code

Name

Causes

Possible Solutions

Er-12

Current Detection Error

There is a phase loss in the drive input power. (U/T1, V/T2, W/T3)

Examine and repair motor wiring.

The current exceeded the current rating of the drive.

  • Check the motor wiring for any short circuits between the wires.

  • Check and turn ON any magnetic contactors used between motors.

  • Replace the control board or the drive. For information about replacing the control board, contact Yaskawa or your nearest sales representative.

The output current is too low.

You tried Auto-Tuning without a motor connected to the drive.

Connect the motor and do Auto-Tuning.

There was a current detection signal error.

Replace the control board or the drive. For information about replacing the control board, contact Yaskawa or your nearest sales representative.