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Home >> Audi >> 2012 >> S4 Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1317 (AIR CONDITIONING [R1234yf SERVICING] (REFRIGERANT CIRCUIT) (CABRIOLET)) >> 87 Air Conditioning >> Refrigerant Circuit >> Components, Replacing >> Dryer Cartridge/Receiver/Dryer. Replacing After Cleaning Refrigerant Circuit

Dryer Cartridge/Receiver/Dryer. Replacing After Cleaning Refrigerant Circuit

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NOTE:

In the receiver/dryer usually there is a dryer cartridge or a desiccant bag are installed (depending on the design of the refrigerant circuit). Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / DRYER BAG/DRYER CARTRIDGE, REMOVING AND INSTALLING or the appropriate information (REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT ) (vehicle-specific repair information).

NOTE:

Cleaning the refrigerant circuit means flushing with refrigerant R1234yf. Refer to REFRIGERANT CIRCUIT, CLEANING .

For example, on account of ingress of moisture (refrigerant circuit open for lengthy period) or contamination

-- Discharge the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, DISCHARGING .

-- Remove the A/C compressor. Refer to A/C COMPRESSOR / A/C COMPRESSOR, REMOVING AND INSTALLING (vehicle-specific repair information).

-- Eliminate the cause of the malfunction. Refer to the appropriate information (REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT ) REFRIGERANT CIRCUIT (vehicle-specific repair information).

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

Electrically-Driven A/C Compressor 

-- Flush the old refrigerant oil out of A/C compressor. Refer to ELECTRICALLY DRIVEN A/C COMPRESSOR, CLEANING .

Mechanically Driven A/C Compressor 

-- Remove the oil drain plug from the A/C compressor. Refer to the appropriate information (REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT ) (vehicle-specific repair information).

NOTE:

Replacing the different versions of the oil drain plugs and their corresponding seal. Refer to LEAKING OR DAMAGED AREAS, REPLACING, EMPTY REFRIGERANT CIRCUIT EXCEPT A/C COMPRESSOR AND RECEIVER/DRYER , or the appropriate information (REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT ) (vehicle-specific repair information) and the Parts Information.

-- To accelerate drainage of refrigerant oil, turn the A/C compressor via the belt pulley or the A/C clutch plate, for example. Refer to A/C COMPRESSOR / A/C COMPRESSOR, REMOVING AND INSTALLING (vehicle-specific repair information).

-- Pour old refrigerant oil out of A/C compressor. Refer to A/C COMPRESSOR, REPLACING WITHOUT THE NEED FOR FLUSHING REFRIGERANT CIRCUIT .

NOTE:

Dispose of old refrigerant oil (pay attention to local regulations).

All A/C Compressors 

-- Examine the expansion valve for dirt or corrosion; replace if necessary. Refer to EXPANSION VALVE, REMOVING AND INSTALLING or the appropriate information (REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT ) (vehicle-specific repair information).

-- Then add to the A/C compressor the new refrigerant oil quantity which matches the refrigerant oil quantity in the replacement compressor (or the specified refrigerant oil quantity in vehicles with two evaporators). Refer to TECHNICAL DATA (REFRIGERANT & APPROVED OIL CAPACITIES) or MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (1 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (3 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (4 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (5 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (6 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (7 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (8 OF 8) (CABRIOLET) (vehicle-specific repair information).

NOTE:

Use the different refrigerant oils and quantities for the different A/C compressors. Refer to TECHNICAL DATA (REFRIGERANT & APPROVED OIL CAPACITIES) or MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (1 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (3 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (4 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (5 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (6 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (7 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (8 OF 8) (CABRIOLET) (vehicle-specific repair information).

To ensure compressor lubrication on start-up, at least 40 cm3 of refrigerant oil must be poured into the compressor. The remainder can be added to the refrigerant line or the new reservoir/receiver/dryer/inner heat exchanger. Refer to the appropriate information (REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT ) (vehicle-specific repair information) and TECHNICAL DATA (REFRIGERANT & APPROVED OIL CAPACITIES) or MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (1 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (3 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (4 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (5 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (6 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (7 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (8 OF 8) (CABRIOLET) (vehicle-specific repair information).

If on an open refrigerant circuit dirt enters the A/C compressor (for example during an accident) the refrigerant circuit must be cleaned and the A/C compressor must be replaced. Refer to REFRIGERANT CIRCUIT, CLEANING  and A/C COMPRESSOR / A/C COMPRESSOR, REMOVING AND INSTALLING (vehicle-specific repair information).

On vehicles with two evaporators the refrigerant oil quantity in the refrigerant circuit can be greater than the quantity which is in the replacement compressor add the remaining refrigerant oil quantity to the refrigerant circuit if necessary. Refer to TECHNICAL DATA (REFRIGERANT & APPROVED OIL CAPACITIES) or MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (1 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (3 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (4 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (5 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (6 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (7 OF 8) (CABRIOLET) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (8 OF 8) (CABRIOLET) (vehicle-specific repair information).

-- Replace the desiccant bag/dryer cartridge (or receiver/dryer). Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / DRYER BAG/DRYER CARTRIDGE, REMOVING AND INSTALLING or the appropriate information (REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT ) (vehicle-specific repair information).

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

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