Refrigerant System Performance Test
Charging Procedure Flow1. Install the manifold gauge set.
2. Place a dry bulb thermometer in the center ventilator outlet.
3. Place a wet and dry-bulb thermometer at the blower inlet.
4. Open the front doors and the front windows.
5. Warm up the engine and run it at a constant 1,500 rpm.
6. Turn the AUTO switch on.
7. Set the temperature setting dial to 18.0 °C (65 °F).
8. Wait until the air conditioner output temperature stabilizes.
Stabilized condition Blower inlet temperature: 25-35 °C (77-95 °F)
High-pressure-side reading: 1.1-1.7 MPa (11-18 kgf/Sq.cm, 160-250 psi)
9. After the air conditioning stabilizes, read the wet and dry-bulb thermometer, and then calculate the relative humidity by using the graph.
HOW TO READ THE GRAPH:
10. Read the dry-bulb thermometer at the air outlet, and calculate the temperature difference between the center ventilator outlet and the blower inlet.
11. Verify that the intersection of the temperature difference and the relative humidity is in the shaded zone.
12. If the performance is abnormal, troubleshoot the system.