Cause : Resonance Detection comes when a filter resonance fault was detected or there is a harmonic component on the power supply side. The power supply was turned off during operation.

1. Stop the operation of the converter and turn off the power supply.
2. There is noise on the power supply line.
3. Investigate the source of the noise and implement countermeasures.
4. A phase was lost for an input terminal during operation.
5. Check the wiring of the power supply system and remove the cause of the phase loss.