TC reported air-con fault at rear M1 car. Staff(NOV) checked and confirmed #2 set faulty. Reset - ok . Car was cooling. ~~~~~ TC reported air-con fault at rear M1 car     #3512 A/C 1-1 Check and found low freon.Top up freon LP/HP 40/120 Psi,function check ok. #1512 a/c 1-1 & 1-2 found short cycling.A/C 1-1 having low freon-top up and function test ok.A/C 1-2 found over charged,Throw freon until to norminal level and function check ok. Done by Kumar/Jack/Sateesh/Koh. 12/05/20