Electrically-Driven A/C Compressor, Cleaning

Special tools and workshop equipment required 

• A/C Service Station

• The refrigerant oil in an electrical A/C compressor cannot be completely removed by pouring it out.
• The refrigerant oil is removed by flushing in flow direction.
• Cleaning is done automatically, following the program of the A/C Service Station. Refer to Owner's Manual.

Procedure 

• A/C compressor, removed

-- Pour out as much refrigerant oil as possible via the refrigerant line connections.

Tip

If refrigerant oil from a new A/C compressor is poured into a clean container and this container is sealed air tight afterward, then it can be used to adjust the refrigerant oil capacity later on.

-- Connect the A/C compressor with the A/C service station. Refer to MAIN WIRING DIAGRAM, ELECTRICALLY-DRIVEN A/C COMPRESSOR, CLEANING .

-- Position the A/C compressor so that the high-pressure side output is as low as possible. This will guarantee best possible results of draining the A/C compressor.

-- Select program for flushing.

-- Clean the A/C compressor.

Tip

Depending on version of the A/C Service Station, old oil container holds only approximately 125 cm ³ refrigerant oil, in the event a system with a larger quantity of refrigerant oil must be flushed, it may be necessary to drain the old oil container after the first flushing process of one flushing cycle.

-- After completion of the flushing procedure, check the refrigerant circuit pressure. There must not be any pressure in the A/C compressor (evacuate the refrigerant circuit briefly once more if necessary).

-- Remove the refrigerant line connection from the A/C compressor to the A/C Service Station.

-- Perform the adjustment of the amount of refrigerant oil in the refrigerant circuit, depending on the complaint. Refer to COMPONENTS, REPLACING  and REFRIGERANT OIL CAPACITIES .