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Home >> BMW >> 2013 >> 740Lxi >> Repair and Diagnosis >> External Pages >> Different car >> Section 465 (Heating And Air Conditioning - Repair) >> Air Conditioning System >> 64 50 010 Drawing off, evacuating and filling heating and air conditioning system (R134a) >> Vehicle-specific notes

Vehicle-specific notes

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

F02/F03/F04 only: 

To ensure a virtually complete draining of refrigerant from the automatic rear air-conditioning system or the hybrid battery cooling system:

In the diagnosis system under Service functions carry out the instructions for "Draining/filling refrigerant circuit".

Only M5 (S63): 

To access refrigerant line connections, the right intake silencer housing must be removed.

F01/F02/F03/F04/F06/F12/F13 (N63) only from 07/2012: 

To access refrigerant line connections, the right intake port must be removed.

IMPORTANT: Risk of damage!
Carefully move the climate service station!
Comply with the operating instructions and service interval for the A/C service station!
Make sure that the hoses of the A/C service station are drained after the drawing off or filling procedure!
The climate service station contains highly sensitive components, such as scales. These components will be damaged due to improper handling, such as fast driving over a bump. This will result in a significant reduction of the measuring accuracy when drawing off and filling.
Fig 1: Draining Refrigerant From Automatic Rear Air-Conditioning System
G04727887Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: The vehicle must be parked on the ground during all draw-off, evacuation and filling procedures!
Filling a raised vehicle will result in insufficient filling levels.
NOTE: In case of complaints, carry out a heating and air conditioning performance test!
If the system fails the test, draw off, evacuate and fill the heating and air conditioning system in accordance with the operating instructions of the relevant service station.

Instructions for drawing off heating and air conditioning system: 

To help separation of refrigerant and refrigerant oil, run engine at low speed (800-1200 RPM) and with heating and air conditioning system turned on for a few minutes.

The limits the entrainment of refrigerant oil while it is drawn off.

Drawn-off refrigerant oil must be changed and reintroduced via the A/C service station.

During drawing off, set blower of heating and air conditioning unit to middle blower speed. This ensures that drawing off is more effective since the pressure on the low pressure side increases.

Recycling: 

Dispose of drawn-off refrigerant oil as hazardous waste.

Observe country-specific waste disposal regulations.

Instructions for evacuating heating and air conditioning system: 

Before each filling, evacuate the refrigerant system.

Observe an evacuation time of at least 30 minutes  .

The evacuation procedure removes all traces of ambient air, water vapor and any other gases present from the heating and air conditioning system. This enables subsequent system filling with refrigerant.

If the vacuum does not remain stable when the system is off, run the procedure for leaks in the refrigerant circuit.

During evacuation, set blower of heating and air conditioning unit to middle blower speed. This ensures that evacuation is more effective since the pressure on the low pressure side increases.

Instructions for filling heating and air conditioning system: 

Before filling with refrigerant, replace the refrigerant oil entrained during drawing off.

Also top up any lost fluid as indicated in the table:

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