1647 A/C 2 Coolant Pressure Fault. To ch ~~~~~ 1647 A/C 2-2 Coolant Pressure Fault. To check & rectify. Found Copper gasket seal failed. (Unit isolated)  1647 A/c 2-2 found suction pipe CCU connection having heavy freon leak. Unable to tighten. OPS 20 raised to replace copper seal gasket/vacuum/recharge freon to criteria.  Kana 44111 To further rectify.  1647 A/c 2-2 replaced suction pipe copper seal, vacuum A/c system & charged freon 6.8kg - Done. Function test A/c & leak heck - OK.  Chan GF 44111