TC reported air-con fault at Rear M2 car, air con #02. Unable to reset. Staff (CCK) checked and conf irmed that rear M2 #02 set air-con faulty. Reset - ok. Car w as cooling. ~~~~~ 2534 TC reported A/C 2 fault Unable to reset. Staff (CCK) confirmed 2534 A/C 2 faulty. Reset - ok. Car was cooling.  2534 A/C 2 Freon Low - Charged 1kg Freon Into Unit. Tighten Suction Charging Nipple. Tested A/C Operation - Ok. Azmi/Hanafi 43938