Leaking Or Damaged Areas, Replacing, Empty Refrigerant Circuit Except A/C Compressor And Receiver/Dryer

The Refrigerant Circuit Was Completely Empty (for Example with Larger Leak or Cracked Hose)

Pay attention to the general information for replacing components. Refer to GENERAL INFORMATION FOR REPLACING COMPONENTS .

NOTE:

In the event of only a minor leak with slow escape of refrigerant (for example at a small leakage point), the amount of refrigerant oil lost and the amount of moisture penetrating after servicing is not sufficient to influence operation of the air conditioner.

The operations marked * are only to be implemented in case of a major leak (for example following an accident).

Electrically-Driven A/C Compressor

-- Remove the faulty component. Refer to SYSTEM OVERVIEW - REFRIGERANT CIRCUIT .

-- Remove the electrically-driven A/C compressor and clean (flush with refrigerant R1234yf)*. Refer to REFRIGERANT CIRCUIT, CLEANING and COMPRESSOR, REPLACING ON ACCOUNT OF LEAKAGE OR INTERNAL DAMAGE (vehicle-specific repair information).

-- Clean the refrigerant circuit (flush with refrigerant R1234yf). Refer to REFRIGERANT CIRCUIT, CLEANING .

-- Fill the specified complete oil quantity in the A/C compressor or the circuit. Refer to A/C COMPRESSOR, REPLACING WITHOUT NEEDING TO CLEAN REFRIGERANT CIRCUIT and Technical Data (The approved refrigerant oil and capacity for the refrigerant oil can be found in the vehicle-specific repair information).

Mechanically Driven A/C Compressor

-- Remove the faulty component. Refer to SYSTEM OVERVIEW - REFRIGERANT CIRCUIT .

-- Remove A/C compressor.* Refer to A/C COMPRESSOR .

-- Remove the oil drain plug -B- / -D- from the A/C compressor -A-.*

Fig 1: Identifying Removal Of Oil Drain Plug -B- / -D- From A/C Compressor -A-

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

The versions of the oil drain plug -B / D- and the seal -C / E- are different (depending on the manufacturer of the A/C compressor). Refer to A/C Compressor (vehicle-specific repair information).

When installing the oil drain plug -B / D-, note the tightening specification (dependent on the A/C compressor manufacturer and the oil drain plug version). For Denso and Delphi A/C compressors, a seal is installed on the oil drain plug, for example. Refer to OVERVIEW - A/C COMPRESSOR POWER UNIT .

After charging the refrigerant circuit check the installed oil drain plug for leaks for example using an electronic leak detector.

To accelerate drainage of refrigerant oil, turn the A/C compressor via the belt pulley or the A/C clutch plate, for example.

-- Drain the old refrigerant oil from the A/C compressor*. Refer to A/C COMPRESSOR, REPLACING WITHOUT NEEDING TO CLEAN REFRIGERANT CIRCUIT .

All Vehicles

NOTE:

Then fill A/C compressor with quantity of new refrigerant oil corresponding to quantity of refrigerant oil in replacement A/C compressor.* Refer to Technical Data .

Use different refrigerant oils and quantities for different A/C compressors. Refer to Technical Data .

To ensure compressor lubrication on start-up, at least 40 cm³ (1.35 oz) of refrigerant oil must be poured into the compressor. The remainder can be added to the new reservoir/receiver/dryer or a refrigerant line. Refer to Technical Data .

If on an open refrigerant circuit dirt enters the A/C compressor (for example during an accident) the A/C compressor must be replaced. Refer to A/C Compressor .

Clean the refrigerant circuit (flush with refrigerant R1234yf). Refer to REFRIGERANT CIRCUIT, CLEANING .

-- Replace the dryer cartridge and receiver/dryer. Refer to SYSTEM OVERVIEW - REFRIGERANT CIRCUIT .

-- Assemble, evacuate and recharge the refrigerant circuit. Refer to WORKING WITH A/C SERVICE STATION .