TC feedback TIMS showed air-con fault atrear M2 car (2509). Staff(YIS) checked and confirmed rear M 2 car (2509) set #2 air-con faulty.oling. ~~~~~ 2509 TC feedback TIMS showed A/C 2 fault. Staff(YIS) confirmed A/C 2 faulty. Reset - ok. Car was cooling. CE feedback 2509 A/C 2 short cooling, temp 26.9'C.  2509 A/c 2 found no abnormalities. AS a precaution, charged in freon & monitored for 1 hr. Checked cut in/out operation & temp. at 24'C - OK.  Azmi/Isam/Safwan/Raihan 44125