Cause : RFC-S mode phasing failure due to incorrect phase angle comes when the Phasing Error trip indicates that the phase offset angle in Pr 03.025 (or Pr 21.020 if the second motor map is being used) is incorrect if position feedback is being used and the drive is unable to control the motor correctly.

1. Check the encoder wiring.
2. Check the encoder signals for noise with an oscilloscope.
3. Check the encoder mechanical coupling.
4. Perform an auto-tune to measure the encoder phase angle or manually enter the correct phase angle into Pr 03.025
5. Spurious Phasing Error trips can sometimes be seen in very dynamic applications. This trip can be disabled by setting the over-speed threshold in Pr 03.008 to a value greater than zero.