DT CX, #2655 AC 1-1, #1656 AC 2-1, #3656 ~~~~~ DT CX, #2655 AC 1-1, #1656 AC 2-1, #3656 AC 1-1 COOLANT PRESSURE FAULT.  Checked 2655 AC1-1 & 3656 AC 1-1 -AC system operation-OK.But HP & LP within limit. As precaution -Cleaned condenser filter & fin. Checked 1656 AC 2-1 LP Low.Tighten suction side connector Discharged & Vacuum & top up freon. All stated AC Temp.at 24 deg.C. 44400 Hanafi/Chan SW