TC reported BCU fault at Front M2 car 2547. Brake status showed no abnormailites. Fault self clear. Recurred at TAP1. Fault Self clear when departing station. ~~~~~ TC reported BCU fault at Front M2 car 25     #2547 M2 car Tims show fault code 308,330,331 and cleared itself.Replaced ACU and conduct function test ok. ER download on no6 lap top. ACU-New s/n: 1008-001  Old s/n: 1244-109 Not: 2196796 raise. Done by Kalees/Pravin/Haiqal   04/09/20