EB applied in AM mode after train door closed with TOD showing EB applied due to obstruction motion,TC feedback earlier DMI at rear M2 car lighted up momentari ly. Subsequently TC reported no other fault indications, TC ~~~~~ Downloaded ER and fault found to be #2523 brakes not released. Found ACU solenoid v/v faulty and replaced. Brake cyclic test-tested ok. ACU-New s/n: 1244-105.  Old s/n: 00-04-054-OB. Not: 2120493 Raised to RSW. Done by Gopal/Samsudin. 14/01/20.