Suction the air conditioning

Precondition

The engine is switched off.

CAUTION: Refrigerant circuit under high pressure.
Injury hazard!

Note and follow safety instructions on containers.
Avoid contact with refrigerant; wear safety goggles and hand protection.
For additional information see: 64 50 SAFETY INSTRUCTIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A and 64 50 NOTES FOR REPAIR WORK ON AIR CONDITIONING

NOTE: TECHNICAL INFORMATION
If the A/C service station for the R1234yf refrigerant identifies contaminated refrigerant in the refrigerant circuit of the vehicle before the suction process, a SPECIAL PROCEDURE to draw off and dispose of this refrigerant must be followed.

Let the engine run for a few minutes at a low engine speed (800-1200 RPM) and with the heating and air conditioning system switched on.
Stop engine.
Carry out the service function:
- Body
- Heating and air conditioning functions
- Drain/fill up refrigerant circuit
Remove the sealing caps from the refrigerant filler necks.

Courtesy of BMW OF NORTH AMERICA, INC.
Connect the high pressure line of the A/C service station with the vehicle's high-pressure connection (red).
Connect the low-pressure line of the A/C service station with the vehicle's low-pressure connection (blue).
Start the suction process on the A/C service station.
During suction process, allow the blower of the heating and air-conditioning unit to run at middle blower speed.
Record the amount of evacuated refrigerant and coolant oil level after having completed suction process.
Keep the sheet with the recorded quantities as the values are once again required when filling.
Disconnect the high pressure line and low pressure line.
Drain the high pressure line and low pressure line.
Close the sealing cap of the coolant filler neck.
Correctly dispose of the drained refrigerant oil.