TC reported air-con fault. Unable to reset. Staff(MSL) checked and confirmed that rear DT car set #0 2 air-con faulty. Reset - ok. Car was cooling. ~~~~~ TC reported air-con fault. Unable to res To further troubleshoot 3622 A/C 2 AHU to change out due to choke A/C 2-2 HM assisted to replace #3622-a/c 2 AHU Refer to Not: 2495337 Checked by Kenneth. 07/06/23