Cause : Ethernet communication fault comes when ethernet communication is interrupted by physical factors while Pr.1431 Ethernet signal loss detection function selection = "3". The inverter trips when Ethernet communication is cut off for the time set in Pr.1432 Ethernet communication check time interval or longer between the inverter and all devices with the IP addresses in the range specified for the Ethernet command source selection (Pr.1449 to Pr.1454).

1. Stops the inverter output when excessive noise occurs around the inverter.
2. Check that the Ethernet board is installed onto the connector securely
3. Check for a break in the Ethernet cable.
4. Check that the Pr.1432 setting is not too short.
5. Check for excessive noise around the inverter.