Passenger feedback to station staff (ADM) car 1531 air-con warm. TC reported there was no air-con fa ult. Station staff (MSL) checked and found no air-con fault but feedback the car was warm. ~~~~~ Passenger feedback to station staff (ADM     #1531 Fault code 618 a/c 2-1. Before LP=30,HP=70. After freon charging LP=50,HP=110psi.During charging no sign of freon leak at condenser side.Monitor for half hour no drop of pressure. Done by Saini/Koh/Haslan.   06/10/20