Attention! Start the car engine only when the air conditioner is completely filled with R134a refrigerant.
Pumping, vacuuming and filling the air conditioner should only be carried out at a service station, in accordance with the Service Unit Operation Manual.
In order to improve the conditions for separating the R134a refrigerant from the refrigeration oil, it is necessary to let the car engine run for several minutes at partial loads (at a frequency of 800–1200 min⁻¹). This limits the release of refrigeration oil when pumping out the refrigerant.
The extracted refrigeration oil must be replaced and reintroduced into the air conditioner through the service unit.
Send the pumped out substandard oil for disposal.
If at the end of the recovery process the humidity indicator of the relevant service unit shows too high a humidity level in the recovered R134a refrigerant, it must be dehumidified.
When vacuuming, atmospheric air, water vapor and other gases must be completely removed from the air conditioner. This makes it possible to subsequently fill the system with R134a refrigerant. A decrease in the degree of vacuum indicates a leak in the refrigerant circuit.
Before filling the air conditioner with R134a refrigerant, it is necessary to add refrigeration oil to the norm, replacing the oil that came out during pumping out.
In case of replacement of a part in the air conditioner, depending on its type, it is necessary to add refrigeration oil, even if no noticeable losses were detected during pumping. The filling capacity of the air conditioner is indicated on its plate, located in the underhood space of the engine compartment.
Refueling must be carried out according to the Installation Manual, and it is necessary to fill 440±10 g of R134a refrigerant. After refueling, it is necessary to plug the air conditioner filling nipples on the car.