Train EB tripped in Auto mode at CTH WB.TC reported TOD showed BCU fault and obstructed motion occu rred. Reset EB , ok. Fault self cleared. Proceeded in Auto m ode to next station. ~~~~~ 3529 Train EB tripped in Auto mode at CTH WB. TC reported TOD showed BCU fault and obstructed motion occurred. Reset EB, ok. Fault self cleared. Proceeded in Auto mode to next station.  2530 BCU FC registered: 331/312/308 Tested brake operation found Slow to release. Replaced ACU & Tested operation - OK. O: 1032/043    N: 1024/028 Alan/Lee PT/Suga 44661