3668 A/C 2-1 coolant pressure fault. ~~~~~ 3668 A/C 2-1 coolant pressure fault.  3668 A/c 2-1 coolant fault. Reclaim freon, vacuum system & charged in 6.8kg of freon. LP = 40 psi  HP = 120 psi. Replaced condenser filter due to worn-out. CCU checked for any sign of leak - OK. Function check A/c operation - OK.  Ridzuan 44178