06
Phase failure
SEW Eurodrive · MOVIFIT-FC Inverter
What does 06 mean?
A phase failure has been detected in the supply system. This fault indicates a loss of one or more phases in the input power supply, and it is detectable only when the drive is operating under load. Continued operation with a phase failure can damage the motor or inverter.
Source: SEW Eurodrive MOVIFIT-FC Inverter
Open Manual (Page 126)