Refrigerant Circuit Cleaning Process

• If a vehicle-specific description is available for cleaning the refrigerant circuit, then it must be performed. Refer to Refrigerant Circuit .

Procedure 

-- Perform preliminary work for flushing the refrigerant circuit. Refer to PRELIMINARY WORK FOR FLUSHING REFRIGERANT CIRCUIT .

-- If the refrigerant circuit must be cleaned in several sections, then connect the refrigerant circuit according to the main wiring diagram and clean the sections one after the other in the specified order. Refer to MAIN WIRING DIAGRAM FOR CLEANING THE REFRIGERANT CIRCUIT .

-- REFRIGERANT CIRCUIT, CLEANING .

-- The following components must be replaced after completely cleaning the refrigerant circuit, depending on the design of the refrigerant circuit. Refer to Refrigerant Circuit .

• Reservoir
• Receiver/Dryer
• Desiccant Bag/Dryer Cartridge in the Receiver/Dryer
• Replace additional components after flushing, specific to complaint and vehicle. Refer to or ADAPTER FOR ASSEMBLING FLUSHING CIRCUIT .

-- Examine expansion valve for dirt or corrosion; replace if necessary.

-- Perform an adaption of the refrigerant oil amount in the refrigerant circuit, depending on the complaint. Refer to COMPONENTS, REPLACING  and TECHNICAL DATA .

-- Charge the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, CHARGING .

-- A/C System, Starting according to guidelines. Refer to A/C SYSTEM, OPERATING AFTER CHARGING .