3640 A/C 1 Coolant Pressure Fault. To ch ~~~~~ 3640 A/C 1 Coolant Pressure Fault.  3640 A/c 1-1 v/v core suction side leak - retightened. Checked LP 20 psi HP 50 psi. Vacuum & recharged freon to criteria (LP 40psi HP 115psi). Monitor for 1 hr & no drop in pressure - OK.  Solihin/Salleh/Koon PL/Farid 44111