Cause : Upper limit fault detection comes when the inverter output is shut off when the load exceeds the upper limit fault detection range. This protective function is not available in the initial setting of Pr.1490 (Pr.1490 = "9999").

1. Check if too much load is applied to the equipment.
2. Check that the load characteristics settings are correct.
3. Inspect the equipment. 
4. Set the load characteristics (Pr.1481 to Pr.1487) correctly.