Cause : Instantaneous power failure comes when a power failure occurs (or when power input to the converter is shut off), the instantaneous power failure protection function activates to stop the output of the converter and prevent the control circuit from malfunctioning.

1. If a power failure persists for 100 ms or longer, the fault output is not provided, and the converter and the inverter restart if the start signal is ON upon power restoration. (The converter and the inverter continues operating if an instantaneous power failure is within 10 ms.)
2. In some operating status (load magnitude, acceleration/deceleration time setting of the inverter, etc.), overcurrent or other protection may be activated upon power restoration.
3. The IPF signal is output when a power failure is detected.
4. Find the cause of the instantaneous power failure occurrence.