Refrigerant Pressure Check

1. Install the manifold gauge set.
2. Close all the doors and all the windows.
3. Warm up the engine and run it at a constant 1,500 rpm.
4. Turn the AUTO switch on.
5. Set the temperature setting dial to 18.0 °C (65 °F).
6. Measure the ambient temperature and the high and low-pressure side readings of the manifold gauge.
7. If the high and low-pressure side readings are in the shaded zone shown in the figure, the refrigerant system is normal. If the pressures are abnormal, refer to flowchart No.20 and troubleshoot the system.