Electric A/C Compressor EKK: Notes

Fig 1: Identifying Electric A/C Compressor EKK

Courtesy of BMW OF NORTH AMERICA, INC.

ELECTRIC A/C COMPRESSOR EKK EXPLANATION CHART

Index	Explanation
1	High-voltage connector for EKK
2	EKK control unit and DC/AC converter
3	Electric A/C compressor
4	Silencer

NOTE: The electric A/C compressor is a high voltage component!

Before working on a high voltage component, you must apply the safety rules to shut down the high voltage system. Once this has been accomplished according to procedure, all high voltage components are no longer live and work can proceed in safety.

There is an extra safety precaution is implemented as a means of imposing an automatic shutdown of the high voltage system. The plug connections on the electric A/C compressor are designed such that the 12 V connector always has to be disconnected first. Only then is it possible to disconnect the high voltage connector.

Disconnecting the 12 V connector interrupts the circuit of the high voltage interlock loop (HVIL) and de-energizes the high voltage electrical system.

The electric A/C compressor in the E72 is installed in the same location as the belt-driven air conditioning compressor of the E71. Because the electric A/C compressor in the E72 is not driven via the drive belt, it could theoretically have been installed anywhere in the vehicle, but for space reasons and to use the existing connections to the condenser, the installation location has not changed.

NOTE: The only Service employees permitted to work on the high voltage components identified in this way are those who satisfy all the requirements for undertaking work of this nature: qualification, compliance with the safety rules, procedure strictly in accordance with the repair instructions.

Fig 2: Identifying Climate Control System

Courtesy of BMW OF NORTH AMERICA, INC.