TC reported air-con fault. Staff(CTH) checked and confirmed that car 3507 set #1 air-con faulty. Res et - ok. Car was warm. ~~~~~ TC reported air-con fault. Staff(CTH) checked and confirmed that car 3507 set #1 air-con faulty. Reset - ok. Car was warm. CE checked & found 3507 A/C #1, 2507 A/C #2 & 1508 A/C #1 coolant pressure fault Car warm.(27.2*C)  #3507 A/C 1-1 low freon topup freon to 40/120 PSI, no sign of leak in CCU and AHU. #2507 A/C 2-1 low freon topup freon to 40/125 PSI, no sign of leak in CCU and AHU. #1508 A/C 1-1 low freon topup freon to 35/120 PSI, no sign of leak in CCU and AHU. Done by: Saini, Din, Kumar. 15/03/2024.