Attention! If the air conditioning circuit has been opened and atmospheric air has entered it, it must be pumped out using a vacuum pump. After installing a component of the air conditioning system, the system must be pumped out within 15 minutes. An assembly that has been opened for repair and maintenance must be evacuated within 30 minutes.
Order of execution
1. The engine must be turned off.
2. Connect the pressure gauge inlet tube to the compressor and close the high and low pressure valves.
3. Make sure the refrigerant has been removed from the A/C system.
4. Connect the center hose of the pressure gauges to the vacuum pump inlet.
5. Start the vacuum pump and open the high and low pressure valves.
6. After 10 minutes, the vacuum should be 94.39 kPa. If the required vacuum is not reached, there is a leak in the air conditioning system, which must be repaired in the following order:.
- Close both valves and stop the vacuum pump;.
- Charge the air conditioning system with approximately 0.4 kg of refrigerant;
- Check the tightness of the air conditioning system. Repair any leak found;
- Re-discharge the air conditioning system and pump it out. If no leaks are found, continue to evacuate the system.
7. Start the vacuum pump.
8. Open both discharge valves until a vacuum of 94.39 kPa is obtained.
9. After the low pressure gauge shows a vacuum close to 94.39 kPa, continue pumping for 15 minutes.
10. After evacuating for 15 minutes, close the discharge valves and stop the vacuum pump. Disconnect the hose from the vacuum pump. The system is now ready to charge.