Component Description For Electric Refrigerant Compressor - GF83.55-P-2110GN

MODEL 166.063 as of model year 2016 

Location 

The electric refrigerant compressor is located on the side of the engine.

Task 

The electric refrigerant compressor is responsible for intake and compression of the refrigerant. The speed of the electric refrigerant compressor is continuously regulated as a function of the evaporator temperature from 700 up to 9000 rpm.

The automatic air conditioning control and operating unit (N22/7) actuates the electric refrigerant compressor via climate control LIN 2 (LIN B8-2).

Pressing the "OFF" button or the "A/C" button on the automatic air conditioning control and operating unit also switches off the electric A/C compressor. The other functions of the automatic air conditioning are still available. However, a cool-down below the current outside temperature is not possible.

Switching on the electric refrigerant compressor can also be requested by the high-voltage battery cooling function or the pre-entry climate control function.

High-voltage battery cooling system function:

The battery management system control unit (N82/2) sends the switch-on request via hybrid CAN (CAN L), ME-SFI [ME] control unit (N3/10), chassis CAN 1 (CAN E1), electronic ignition lock control unit (N73) and interior CAN (CAN B) to the automatic air conditioning control and operating unit.

Pre-entry climate control function:

The electronic ignition lock control unit sends the statuses of the CL via the interior CAN to the automatic air conditioning control and operating unit. The automatic air conditioning control and operating unit then initiates pre-entry climate control.

The electric refrigerant compressor is diagnosed using the diagnostic tester.

Body 

The control unit and refrigerant compressor power electronics for the electric refrigerant compressor regulate the rotational speed of the electric motor and the quantity of refrigerant. The electric motor drives the spiral compressor. This consists of two intertwined spirals, one of which is permanently connected to the housing while the second rotates in a circle in the first one. The spirals here form several increasingly smaller chambers within the coils. In these chambers, the refrigerant compressed in this manner reaches the center, where it then exits compressed.