Important Repair Information For Refrigerant And Refrigerant Oil
- No refrigerant R134a may be filled in a A/C system for refrigerant R1234yf.
- No refrigerant R1234yf may be filled in a A/C system for refrigerant R134a.
- The specifically developed refrigerant oils for the refrigerant circuit with refrigerant R1234yf and R134a may only be used in a refrigerant circuit which was filled with another refrigerant when the corresponding approvals for this are available. Refer to APPROVED REFRIGERANT OILS AND REFRIGERANT OIL CAPACITIES (vehicle-specific service information).
- A/C service stations that come in contact with the refrigerant are only to be used for the intended refrigerant.
- An information label -A- indicating the refrigerant used is provided in the engine compartment on the lock carrier or in the plenum chamber.
- Different refrigerants are never to be mixed.
- Depending on the version and the vehicle date of manufacture, the GWP value (global warming potential) for the refrigerant used may also be specified.
- To make sure that only Refrigerant R1234yf with a specific purity is extracted in the R1234yf A/C service station perform a gas analysis before discharging the refrigerant circuit. Refer to REFRIGERANT GAS ANALYSIS, PERFORMING .
NOTE:
If it is determined by the gas analysis that the refrigerant R1234yf is contaminated with another gas, it must be extracted from the refrigerant circuit and be analyzed, recycled or disposed of as a gas from an unknown composition according to the legal requirements. Refer to REFRIGERANT GAS ANALYSIS, PERFORMING and RETURN OF CONTAMINATED REFRIGERANT R1234YF FOR ANALYSIS, PREPARATION OR DISPOSAL .