TC reported TIMS showed BCU release fault at car 2510. ~~~~~ 2510 ER D/L & found intermittent abnormal FC. Replaced ACU on 2510. Security & function check - OK. Brake function test - OK. No air leak found. Train shunting movement - OK. 2510 ACU S/N : OLD : 1038/060. NEW : 1047/078.  Redzwan/Amair. 26/01/2020.