Dear @Deyi.Fu,
I shared a tabular listing of the values contained in Figure 9-1 of the NREL 5-MW specifications report in my post dated Mar 26, 2014 in the following forum topic: NREL5MW Rotor Speed Data.
Changing the initial conditions eliminated the “large blade deflection” warning, but you are still receiving the “no valid value of phi” error. Please refer to the forum topic I linked above for the solution. Upgrading from FAST v8.16 to OpenFAST is likely the easiest solution.
Best regards,