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UL4 fault code in yaskawa V1000 drive

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Cause : Undertorque Detection 2 comes when the current has fallen below the minimum value set for Torque Detection Level 2 (L6-05) for longer than the allowable time (L6-06).

  1. Parameter settings are not appropriate for the load.
  2. Check L6-05 and L6-06 settings.
  3. There is a fault on the machine side.
  4. Check the load for any problems.
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