LOW PRESSURE SIDE IN KG/CM2 ( M PA) HIGH PRESSURE SIDE IN KG/CM2 ( M PA) REMARKS SYMPTOMS POSSIBLE REASONS Initially 1.5-2.5 (0.15 -0.25) and later vacuum Initially 14-16 (1.37-1.57)and later 7-10 (0.690.98) Moisture present in system. Initially works normally but later no cooing experienced Freezing of expansion valve due to presence of moisture. 4-6 (0.4-0.6) 7-10 (0.69-0.98) Pressure on low pressure side is high and pressure on high pressure side is low. No cooling. Compressor Defective. 2.5- 3.5( 0.25 – 0.35) 20-25 ( 1.95-2.45) System pressure is high Only Insufficient cooling Excessive refrigerant in the system causing insufficient condenser cooling. Insufficient cooling with low pressure piping will be hot. Air has entered the system. In sufficient cooling with frost or large amount of dew on low pressure piping TXV valve faulty. FATC 63
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