TIMS showed air-con fault at car 1653 set #2. Unable to reset. Staff(CCK) checked and confirmed thatcar xxxx set #x air-con faulty. Unable to reset / Reset - o k. Car was cooling/ warm. ~~~~~ 1653 TIMS showed A/C 2 fault Unable to reset. Staff(CCK) confirmed 1653 A/C 2 faulty. Reset - ok. Car was cooling. SBW SB.  1653 A/c 2-1 Found LP/HP: 30/40psi. Purged & vacuumed, able to hold - 30psi. Topped up Freon. LP/HP: 40/125psi. No Freon leak found on CCU. Monitor for 2hrs, no fault recurred. Aircon able to cut in/out.  Azmi/Aiman 45497