TC reported air-con fault at front M2 car. Staff(BGB) checked and confirmed front M2 air-con no 2 se t fault. Able to reset. Saloon car cooling. TC reported air- con fault at front M2 car. Staff(BGB) checked and confirmed ~~~~~ T254 TC reported air-con fault at front M2(2555) car. Staff(BGB) checked and confirmed front M2 air-con no 2 set fault. Able to reset. Saloon car cooling. CE: 2555,both ac ok.Temp.24.9c. However, 3556 Coolant pressure fault 2 & A/C compressor unit -2-2 fault  #3556 AC2-2 found freon low. Charge freon LP: 40 and HP: 120 PSI and a/c able to cut in/out. #2555 A/C2 Both unit A/C able to cut in/out. To be further monitor on mainline. Done by: Sanip and Koh. 25/07/2024.