TC reported air-con fault. Unable to reset. Staff(SBW) checked and confirmed that car 1668 set #2 ai r-con faulty. Reset - ok. Car was cooling. TC reported air-c on fault. Unable to reset. Staff(SBW) checked and confirmed ~~~~~ 1668 - TC reported air-con fault Unable to reset. Staff(SBW) confirmed 1668 A/C 2 faulty. Reset - ok. Car was cooling. TC reported air-con fault. Unable to reset. Staff(SBW) checked and confirmed.  1668 A/C 2 PSI low: LP 20 & HP80 psi. Discharged & vacuuming done. Charged freon to LP40 & HP110psi. Checked for leak at condenser unit - OK. Saloon cooling temp 24C. Ridzuan/Chan SW/Aliff 45188