Pax feedback to customer relation Rear M1 car was warm. TC confirmed air-con fault at Rear M1 car. S taff(KTB) checked Rear M1 car set #1 and #2 air-con fault. U nable to reset. Car very warm. Pax feedback to customer rela ~~~~~ 1724 Pax feedback to customer relation car was warm. TC confirmed air-con fault at 1724. Staff(KTB) checked Rear M1 car set #1 and #2 air-con fault. Unable to reset. Car very warm.  1724 FC  518 air con 1 HLPS1 operation. 1) #1724 air con 1-1 found LP=10 psi HP=50 psi. Vacuum and charge freon,  running pressure LP 35 psi and HP 110 psi. Check  condenser unit no freon leak found. Raise ops 20 1724 to check at  evaporator unit. 2) #1724 air con 2-1  short cycling and pressure LP 20 psi HP 150 psi (Symptom of choking) . Remove freon and vacuum pipe line. Charging freon and test run, system running with LP 35 psi and HP 110 psi. No Freon leak at condenser unit and saloon temperature able to achived 25 deg C.  Daniel/Redzwan/Chan SW 45408 BSD:  1724 Ahu1 check freon leak.  #1724 AHU1 No found any freon leaking, side finding AHU drain pan water leak into saloon panel, Ops30 to follow up AHU1 c/o. Done By:Jack/Rizman/Koh Date:30/04/2024