2540 BCU Fault. To check & rectify. (DT ~~~~~ 2540 BCU Fault.  2540 ER D/L & found BCU FC 308/330/331. Replaced ACU & function check - OK. Brake cyclic test - OK. No air leak found on ACU. Limited movement/depot shunting - OK.  Sarma/Kiran/Anand 44444 #2540 ACU S/N : OLD : 1301/125 NEW : 1032/043