TC feedback air con fault unable to reset. Staff(DBG) check RDT set#1 fault. Reset - ok. Car cooling . TC feedback air con fault unable to reset. Staff(DBG) chec k RDT set#1 fault. Reset - ok. Car cooling. ~~~~~ 3512 TC feedback air con fault unable to reset. Staff(DBG) check 3512 A/C 1 fault. Reset - ok. Car cooling.  3512 A/c 1 Found Aircon 1 no cooling light lit up in depot, Aircon page on TIMS showed Aircon 1 as VENT. No fault code found. Checked and found freon pressure low (LP 20 psi, HP 70 psi). No freon leak observed on CCU. Vaccummed freon and found pressure able to hold at -30 psi. Charged freon up to LP 40 psi and HP 110 psi. Saloon temperature cooling at 24 deg.  Aliff/Redzwan 45174