Dryer Cartridge/Receiver/Dryer. Replacing After Cleaning Refrigerant Circuit
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 REFRIGERANT CIRCUIT
- Pay attention to the general information for replacing components. Refer to GENERAL INFORMATION FOR REPLACING COMPONENTS .
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
-- Eliminate the cause of the malfunction. Refer to REFRIGERANT CIRCUIT
-- 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 A/C COMPRESSOR
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 , REFRIGERANT CIRCUIT 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
-- Pour old refrigerant oil out of A/C compressor. Refer to A/C COMPRESSOR, REPLACING WITHOUT THE NEED FOR FLUSHING REFRIGERANT CIRCUIT .
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 REFRIGERANT CIRCUIT
-- 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 MAINTENANCE (OIL CAPACITY), DIAGNOSIS (1 OF 2) / MAINTENANCE(OIL CAPACITY), DIAGNOSIS (2 OF 2)
Use the different refrigerant oils and quantities for the different A/C compressors. Refer to MAINTENANCE (OIL CAPACITY), DIAGNOSIS (1 OF 2) / MAINTENANCE(OIL CAPACITY), DIAGNOSIS (2 OF 2)
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 REFRIGERANT CIRCUIT and TECHNICAL DATA .
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
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
-- Replace the desiccant bag/dryer cartridge (or receiver/dryer). Refer to REFRIGERANT CIRCUIT
-- Assemble, evacuate and charge the refrigerant circuit. Refer to WORKING WITH A/C SERVICE STATION .