Dear @Georgia.Tsoukleri ,
Regarding the Mach number warning for the IEA Wind 15-MW reference wind turbine, a similar question was asked and answered in the following forum topic: Mach Number exceeds 0.3 for large wind turbines (15MW) .
Regarding the warning about “temporarily turning off UA”, this warning has been discussed in other several other forum topics and often happens at inboard stations
Best regards,