Functional Check Of The Air Conditioning System

Testing Preparations:
- Unscrew the protective caps from the A/C service ports.
- Connect A/C service gauges to the service ports.





NOTE: Use service hoses with proper shut-off valves to prevent exccess loss of Freon into the atmosphere. Example: Number 2 in the image.





- Insert the thermometer in the air outlet grill.

Testing Conditions:

^ Car parked in shade (indoors).
^ Air conditioner properly charged.
^ Correct type and amount of oil in the compressor.
^ Engine running at 2,000 rpm.
^ Air conditioner switched ON.
^ Car doors shut.

Testing Procedure:
- Read operating pressure values on low and high pressure gages.
- Compare with the nominal value graph.





Key to Nominal Value Graph:
1 - Pressure scale in bar (1 bar = 14.5 psi).
2 - Center vent air temperature in degrees Celsius.
3 - Ambient air temperature in degrees Celsius.
4 - Tolerance range - high pressure range.
5 - Tolerance range - center vent air temperature.
6 - Tolerance range - low pressure range.