Cause : Power Supply Overvoltage comes when the input power supply voltage became equal to or higher than the Input Power Supply Overvoltage Detection Level.

200 V Class: Approximately 277 Vrms
400 V Class: Approximately 630 Vrms

1. The power supply voltage exceeded the range listed in drive input power specifications.
2. Regenerative operation was performed when the power supply capacity was too small.
3. The power supply circuit opened during regeneration.
4. Reduce the voltage to within the range in the power supply specifications.
5. Increase the capacity of the power supply.