Pax feedback to staff(YIS) car 3628 waswarm. TC confirmed no fault found. Staff(YCK) checked and co nfirmed car 3628 was cooling. ~~~~~ 3628 Pax feedback to staff(YIS) car was warm. TC confirmed no fault found. Staff(YCK) checked and confirmed car 3628 was cooling.  3628 A/c 1-1 FC 518 (A/C 1-1 HLPS). Found LP/HP: 10/30psi. Purged & vacuumed, able to hold - 30psi. Topped up Freon, LP/HP: 40/110psi. No Freon leak found on CCU. Monitor for 2hrs, no fault recurred. Aircon able to cut in/out.  Daniel/Chan SW/Redzwan 45497