MOTOR PHASE LOSS

What does OPF mean?

This fault occurs when one or more phases are lost at the drive output to the motor. This can be caused by disconnected motor cables, an open output contactor, or operating with a motor whose power rating is too low for the drive. Instantaneous instability in the motor current can also trigger this fault.

• Loss of one or more phases in the connection between the drive and the motor.
• An output contactor opening during drive operation.
• Motor not connected, or the motor power rating is too low for the drive.
• Instantaneous instability in the motor current.

Click steps to track your progress.

1. 1

   Check the power connections from the drive output terminals to the motor terminals.

2. 2

   If an output contactor is used, set the [Output Phase Loss] (OPL) parameter to [Output cut] (OAC) in the [FAULT MANAGEMENT] (FLt-) menu (page 94).

3. 3

   If testing with a low-power motor or no motor, deactivate motor phase loss detection by setting [Output Phase Loss] (OPL) to [No] (nO).

4. 4

   Check and optimize parameters [IR compensation] (UFr), [Rated motor volt.] (UnS), and [Rated mot. current] (nCr), then perform an [Auto tuning] (tUn) operation (page 43).