Refrigerant Excessively Low

COMPLAINT--Cooling is not adequate.





Condition
- The low side gauge is reading very low.
- The high side gauge is reading very low.
- No bubbles or liquid evident in the sight glass.
- The discharge air from the evaporator is warm.

Diagnosis--The system is excessively low of refrigerant. A serious leak is indicated.

Correction
- Test the system for leaks.

NOTE: Partially recharge the system before testing the system for leaks to ensure that leak detection is obtained.

- Depressurize the system.
- Repair the leaks, and if necessary renew hoses or units.
- Check the compressor oil level. The system may have lost oil due to leakage.
- Evacuate the system using a vacuum pump.
- Recharge the system with new refrigerant.
- Operate the system and check the performance.