TC reported cab air-con was warm. ~~~~~ CE: 3674 Cab Ac blown only vent air, unresettable. Tims no a/c fault shown, no icing.  3674 cab A/c condenser unit found freon leaking from copper tube.  Chan GF. 29/05/2020.  3674 cab A/c CCU replaced - Done. Function test cab A/c high/low pressure - OK. Cab A/c cut in/out operation check - OK. 3674 Cab A/c CCU S/N : OLD : 334077. NEW : 334076.  Chan GF/Alan/Alcus. 30/05/2020.