Refrigerant System Performance

Refrigerant Pressure & Temperature Charts:

Refrigerant system problems are diagnosed by checking refrigerant pressures and clutch cycle rate and times. Compare pressures and cycle time to the chart. Conditional requirements for refrigerant system tests must be satisfied to obtain accurate pressure readings.

Refrigerant System Pressure Evaluation Chart:

If findings do not fall between lines on respective charts, refer to the diagnostic chart to determine specific cause of improper readings.

After necessary repairs have been performed, take pressure readings while meeting conditional requirements to ensure problem has been corrected. Visual inspection of system may determine problems with refrigerant system. By making a visual inspection, some of following problems can be diagnosed: obstructed air passages, broken belts, disconnected or broken wires, loose or broken mounting brackets and refrigerant leaks. A refrigerant leak will usually appear as an oily residue at leakage point in system.