TC reported air-con fault. Unable to reset. Staff(ADM) checked and confirmed that Rear M1 car set #2air-con faulty. Reset - ok. Car was cooling. ~~~~~ 1521 TC reported air-con fault Unable to reset. Staff(ADM) confirmed 1521 A/C 2 faulty. Reset - ok. Car was cooling. CE 1521 both AC running. Temp 25.6*C Coolant pressure fault: 1521 A/C #2, 3522 A/C #1, 2521 A/C #1 & 3521 A/C #1 Compressor Fault: 1521 A/C #2-1 & 2-2, 3522 A/C #1-1, 2521 A/C #1-2 & 3521 A/C #1-1.  1)3521 FC 518 (A/C 1-1 HLPS) LP:10psi, HP:80psi. Vacucum & charged freon 7 kg & check Reading LP:40psi, HP:120psi. No sign of freon leak at CCU Unit. . OPS20 Raised -To checked evap.unit. . 2)1521 FC 618/619 (A/C 2-1 & 2-2 HLPS) LP:05psi, HP:40psi.(A/C 2-1) LP:10psi, HP:50psi.(A/C 2-2) Vacucum & charged freon :7kg(A/C 2-1);6.8kg(A/C 2-2). Check Reading    LP:35psi, HP:120psi.(A/C 2-1) LP:40psi, HP:120psi.(A/C 2-2) No sign of freon leak at CCU Unit. . OPS20 Raised - To checked evap.unit. . 3)2521 FC 519 (A/C 1-2 HLPS) LP:05psi, HP:70psi. Vacucum & charged freon 6.8kg & check Reading LP:35psi, HP:120psi. No sign of freon leak at CCU Unit. . OPS20 Raised - To checked evap.unit. . 4)3522 FC 518 (A/C 1-1 HLPS) LP:15psi, HP:90psi. Vacucum & charged freon 7kg & check Reading LP:35psi, HP:115psi. No sign of freon leak at CCU Unit. . OPS20 Raised - To checked evap.unit. . All cars saloon temp 23-24deg C. Sarma/Alan 45113 To check evap on all fault reported units. #3522 a/c 1-1 & a/c 2-2 checked HP,LP cooling ok. #3521-a/c 1-1 having low freon-charged freon and cooling ok. Found #3521-a/c 1-2 CCU choke.#2521-a/c 1-2 overcharge,drain freon to require PSI and a/c 1-1 cooling ok.#1521-a/c 2-1 & a/c 2-2 Evaporator choke Ops 0030 raise. #3521-a/c 1-2 CCU choke Not: 2503563 raise to RSW. Checked by Sateesh/Koh/sanip. 06/07/23 #1521 AHU 2 choke to c/o  1521 AHU 2 change out done. Function test ok. OLD:032132 NEW:331222 NOTIF:2504290 Done by Koh/Sanip/Sateesh 08.07.23