TC reported Cab 3543aircon blowing warm air. Unable to reset. ~~~~~ CE: Cab AC able to cut-in but cab slightly warm. Remark: Cab AC louver retainer dislodged.  FOUND CAB AC LP/HP OUT OF CRITERIA. CHECKED CCU/AHU OK. FOUND CCU HP VALVE CORE DAMAGED. C/O OK. PURGE/VACUUM DONE. TOP UP 2.1KG FREON. MONITOR 2 HOUR OK. DI USER TEMPERATURE 13.1*C. AC LOURVE SECURED OK. RAGHU/RAM 03.07.2022.