3621 - Aircon 1-1 HLPS fault. To check & ~~~~~ 3621 - Aircon 1-1 HLPS fault.  3621 A/c 1-1 FC 518 (A/C 1-1 HLPS). Found LP/HP: 15/40psi. Purged & vacuumed, able to hold - 30psi. Topped up Freon. LP/HP : 25/110psi. No Freon leak found on CCU. Monitor for 2hrs, no fault recurred. Aircon able to cut in/out.  Daniel/Chan SW/Redzwan 45502