Code

Name

Causes

Possible Solutions

Uv2

Control Power Undervoltage

The value set in L2-02 [Power Loss Ride Through Time] increased and the momentary power loss recovery unit is not connected to the drive.

Connect the momentary power loss recovery unit to the drive.

There was a problem with the drive hardware.

  • Re-energize the drive.

  • If the fault stays, replace the control board or the drive. For information about replacing the control board, contact Yaskawa or your nearest sales representative.
Note:

  • The drive detects this error if the control power supply voltage decreases.

  • Do a Fault Reset to clear the fault.

  • Fault trace is not available for this fault.