Refrigerant Pressure Check

1. Install the manifold gauge set.
2. Open the bonnet.
3. Close all the doors and all the windows.
4. Warm up the engine and run it at a constant 1,500 rpm.
5. Turn the switch on.
6. Set the temperature setting dial to 18.0 °C {64 °F}.




7. Measure the ambient temperature and the high- and low-pressure side readings of the manifold gauge.
- If the high- and low-pressure side readings are in the shaded zone shown in the figure, the refrigerant system is normal.
- If the pressure is abnormal, see flowchart No.20 and troubleshoot the system.