HVAC 45 Low Pressure side in kg/cm2 ( M Pa) High Pressure side in kg/cm2 ( M Pa) Remarks Symptoms Possible reasons on high pressure side is low. 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.
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