HARRIER SERVICE MANUAL PART -1

HVAC 40 Based on the values the following conclusions can be inferred and further troubleshooting can be done. Low Pressure side in kg/cm 2 ( M Pa) High Pressure side in kg/cm 2 ( M Pa) Remarks Symptoms Possible reasons 1.5-2.5 (0.15-0.25) 14-16 (1.37-1.57) System pressure is normal Normal cooling AC system working normal 0.5-1.0 (0.05-0.1) 7-10 (0.69-0.98) Pressure low Insufficient cooling 1. Refrigerant quanti- ty too small. 2.Gas leakage. Vacuum 5-6 (0.5-0.6) Refrigerant fails to circulate No cooling expe- rienced Clogging of AC cy- cle. Initially 1.5-2.5 (0.15 -0.25) and later vacuum Initially 14-16 ( 1.37- 1.57)and later 7-10 (0.69-0.98) Moisture present in system. Initially works normally but later no cooing experi- enced Freezing of expan- sion valve due to presence of mois- ture. 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 Defec- tive. 2.5- 3.5 ( 0.25 – 0.35) 20-25 ( 1.95-2.45) System pressure is high. Only Insufficient cooling. Excessive refriger- ant in the system causing insufficient condenser cooling. Insufficient cooling with low pressure piping will be hot. Air has entered the system. In sufficient cool- ing with frost or large amount of dew on low pres- sure piping TXV valve faulty.