TC reported air-con fault at front M2 car. UTR. Staff (KRJ) checked on confirmed front M2 car #2 setcooling on was not lighted up. Car was warm. ~~~~~ TC reported air-con fault at front M2 ca     Checked and confirmed #2509 a/c 2-1 and a/c 2-2 short cycling.Checked CCU for leaks,found #259 a/c 2-1 and 2-2 heavy leak from shut off v/v.To raise notification to RSW for #2509 a/c 2 CCU change out. Not: 2225269 Done by Fadzzal/Joshua. 02/12/20