Notes for Service department

General notes 

Running in A/C compressor 

After replacement of an air conditioning compressor or refilling the refrigerant circuit, the air conditioning compressor must be run in. Running in is required to ensure lubrication (oil distribution). Running in can only be carried out using the BMW diagnosis system.

For this running in, the air conditioning compressor must be operated within the specified engine speed range. Here, the oil volume filled by the manufacturer mixes evenly with the liquid refrigerant. If the engine speed exceeds the specified engine speed range, running in is aborted automatically. The running-in procedure must then be repeated in its entirety.

Encoding of the heating and air conditioning system 

When encoding the vehicle-specific data, the following details (among others) are taken into account:

• Engine version (diesel engine or petrol engine)
• Version of the heating and air conditioning system (IHKA Basis or IHKA High with FKA or IHKA High with FKA and HKA) If, for example, a rear air conditioner is installed, the integrated automatic heating/air conditioning system must be encoded to "rear air conditioner is fitted" (IHKA control unit is the master controller; the rear air conditioner control unit is a slave). Otherwise the built-in refrigerant shutoff valves (front and rear) remain closed and have no function.

We can assume no liability for printing errors or inaccuracies in this document and reserve the right to introduce technical modifications at any time.