yeah you can’t change from the DXU. It means, create a new IDB changing whether HC or UC. On DRU-01 you will just have to define it in the IDB, whereas on DRU-02, you’ll have to define it on the IDB and change the position of the PCB behind the DRU (be very careful when removing and plugging-in) then load the IDB to the DXU.
Jamil, i dont get your concern mate. does it have any light when you turned it on or nothing? if nothing its faulty I guess.. check the DC cables from the DCCU, if they are connected properly according to its circuit breaker. well any cable will do as long as you know which breaker is to be turned on.. but make it standard.. so follow the sequence.