Causes

Possible Solutions

Unsatisfactory balance of motor phases.

  • Make sure that the drive input power voltage supplies stable power.

  • Set L8-05 = 0 [Input Phase Loss Protect Select = Disabled].

The motor is hunting.

  • Set n1-01 = 1 [Hunting Prevention Selection = Enabled].

  • Increase the value of n2-01 [SpdFeedbackDetectCtr (AFR) Gain] or n2-02 [SpdFeedbackDetCtr(AFR)TimeConst1].