TIMS showed car 2659 set #2 unit air-confaulty. Unable to reset. Staff(BGB) checked and confirmed n o air-con fault. Car was cooling. ~~~~~ TIMS showed car 2659 set #2 unit air-con faulty. Unable to reset. Staff(BGB) checked and confirmed no air-con fault. Car was cooling. CE checked & found 2659 AC 2-1 n 2-2 fault And coolant pressure fault too.  2619 A/c 2-1 found LP pipe leaking & retightened. Vacuum/charged in freon (7kg). LP = 35psi, HP = 110psi. #2659 A/c 2-2 unable to run. Performed freon recovery/vacuum/re-charged freon (6.8kg). LP = 30psi, HP = 110psi. Found  when A/c cut-out, LP = 0psi. Suspect evaporator checked. No icing found on A/c & AHU. OPS 20 raised to replace evaporator unit.  Sarma 44605 To replace evaporator. #2659-AC 2 AHU change out done,AC2-1 function ok.A/C 2-2 found HP=140psi/LP=10psi unable to charge in freon due to CCU choke Notification raise to RSW to follow up CCU c/o. #2659 A/C 2 AHU- Old s/n: 331224 New s/n: 32003 Not: 2358979 Done by Koh/Sanip. 21/02/22 #2659 A/C 2-2 CCU C/O Not: 2358980 raise to RSW.