TC reported air-con fault. Unable to reset. Staff (CCK) checked and confirmed that car 3542 #1 set a ir-con faulty. Reset - ok. Car was cooling. ~~~~~ 3542 TC reported A/C 1 fault Unable to reset. Staff (CCK) confirmed 3542 A/C 1 faulty. Reset - ok. Car was cooling. CE:3542 AC 1-1 fault and coolant pressure fault.  3542 A/c 1-1 found coolant pressure low. Vacuum/charged charged freon to 7kg. (LP=35psi. HP=110psi). Checked no sign of freon leak. Cut-in/out operation - OK. Temp. 23-24*C. Monitor for 2 hrs & no fault occurred.  Anand/Hadi 44561