TIAGO TIGOR CNG - SERVICE MANUAL

HVAC 38 Based on the values the following conclusions can be inferred and further troubleshooting can be done. Low Pressure side in kg/cm 2 High Pressure side in kg/cm 2 Remarks Symptoms Possible rea- sons 1.5-2.5 (0.15-0.25) 14-16 (1.37-1.57) System pressure is normal Normal cooling AC system work- ing normal 0.5-1.0 (0.05-0.1) 7-10 (0.69-0.98) Pressure low Insufficient cool- ing 1. Refrigerant quantity too small. 2. Gas leakage. Vacuum 5-6 (0.5-0.6) Refrigerant fails to circulate No cooling expe- rienced Clogging of AC cycle. 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 ex- pansion 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 De- fective. 2.5- 3.5 ( 0.25 – 0.35) 20-25 ( 1.95-2.45) System pressure is high. Only Insufficient cooling. Excessive refrig- erant in the system causing insufficient con- denser cooling. Insufficient cool- ing 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.