LP8860-Q1: Just use three output channels, in the case of MODE 0, will it report a fault? What is the status of OUT4?

Hi team，

If the customer only uses three strings of backlight, will there be any problems if mode0 is selected, will there be an error message, OUT4 is not connected in MODE 0 state, what is the state of OUT4?

Is it necessary to choose mode1? Thank you