#521/522 multiple AC fault,To rectify ~~~~~ #521/522 multiple AC fault,To rectify  Vacuum and charge freon t 3522 A/C 1-1, 1522 A/C 2-1, 2522 A/C 1-2,1521 A/C 2-2, 3521-A/C 1-1. MOnitor for 1 hour, no coolant pressure fault. Aircon unit able to cut in and cut out. Condenser side no sign of leak Done by Haslan/Haikel 45103