Note: evacuation of the air conditioning system must be performed every time after its depressurization.
Vacuuming removes air and moisture that may have entered the system components. After installing the component, the system should be evacuated for 15 minutes. If a component is installed that was depressurized for repair, the system should be evacuated for 30 minutes.
1. Engine must be off.
2. Connect the gauge manifold hoses to the vehicle's compressor service ports. Close both low and high pressure line valves.
3. Make sure the system has been completely pumped out of the refrigerant.
4. Connect the hose from the center fitting of the gauge manifold to the inlet fitting of the vacuum pump.
5. Start the vacuum pump, then open both valves on the high and low pressure lines of the gauge manifold.
6. After about 10 minutes, check that the low pressure line gauge shows a vacuum of about 94.4 kPa. If vacuum is not created, then there are leaks in the system
In this case, repair the leaks as follows:
- A) Close both gauge manifold valves and turn off the vacuum pump.
- b) Fill the air conditioning system with refrigerant from a bottle (about 400 grams). See section "Refueling the air conditioning system".
- V) Check the system for refrigerant leaks using a leak detector. Eliminate the found faults (leaks). See section "Locating refrigerant leaks".
- G) Draw the refrigerant out of the system again, then evacuate the system. If no leaks are found from the system, continue to evacuate the system.
7. Start the vacuum pump.
8. Open both gauge manifold fitting valves to increase vacuum to 94.4 kPa.
9. After the low line pressure gauge reaches -94.4 kPa, continue evacuating the system for 15 minutes.
10. After approximately 15 minutes of evacuating the system, close both valves on the gauge manifold fittings and turn off the vacuum pump. Disconnect the gauge manifold hose from the vacuum pump. The air conditioning system is now ready to be charged with refrigerant.
