TIMS showed air-con fault at rear M1 carset #02 faulty. Unable to reset. Staff (BDL) checked and ab le to reset fault.Car was cooling. ~~~~~ 1686 TIMS showed A/C 2 fault Unable to reset. Staff (BDL) checked and able to reset fault.  Car was cooling.  1686 A/c 2 found freon pressure low. Charged freon to LP (35psi) HP (110psi). Function test cut in/out operation - OK. Temp. able to achieve 23'C to 24'C. No sign of freon leakage found. Monitor for 3 hrs, no fault occurred.  Sarma/Kamarul 44017