TC reported air-con fault. Unable to reset. Staff(BDL) checked and confirmed all cars cooling. No ai r-con fault found. ~~~~~ 1710 TC reported air-con fault Unable to reset. Staff(BDL) checked and confirmed all cars cooling. No air-con fault found. CE:Checked all six cars no ac fault. Found only 1710  unit 1-2 coolant pressure fault  1710 FC 519 (AC1 HLPS2 Operation) Check freon pressure LP/HP: Low. Charge & found freon leak at connector thread charging gas pipe. Tighten pipe but to no avail. Suspect gasket damaged. Notif (2571235) raised. Daniel/Redzwan 44972