Refrigerant Lines, Disconnecting And Connecting At Electrically-Driven A/C Compressor

Special tools and workshop equipment required

Engine Bung Set :VAS6122

For all procedures on vehicles with a high-voltage system, pay attention to the additional warnings for these vehicles. Refer to SAFETY PRECAUTIONS WHEN WORKING ON VEHICLES WITH HIGH-VOLTAGE SYSTEM .

For the following procedures work near the high-voltage system components is necessary, "Safety Precautions when Working near High-Voltage Components". Refer to SAFETY PRECAUTIONS WHEN WORKING NEAR HIGH-VOLTAGE COMPONENTS .

-- On vehicles with a high-voltage system, switch off (deactivate) the "auxiliary climate control" function. Refer to the Owner's Manual and Infotainment/MMI Operating Manual.

-- Switch off the ignition.

-- Discharge the refrigerant circuit. Refer to Refrigerant Circuit or Working with A/C Service Station (1 Of 2) / Working with A/C Service Station (2 Of 2) .

-- Remove the front noise insulation. Refer to Noise Insulation .

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

Risk of damaging the refrigerant lines and hoses.

Do not bend, twist or stretch the refrigerant lines and hoses.

WARNING:

Danger due to refrigerant coming out under pressure.

Danger of frost bite to skin and other parts of the body.

Evacuate the refrigerant and immediately open the refrigerant circuit afterward.
If more than 10 minutes have elapsed since evacuating the refrigerant and the refrigerant circuit was not opened, evacuate the refrigerant again. Pressure in the refrigerant circuit is caused by evaporation.

-- Remove the bolts -2 and 3- and remove the refrigerant lines -1 and 4-.

-- Seal the open lines and connections with clean plugs from the :VAS6122 .

Installing

Install in reverse order of removal and note the following:

-- Replace the O-rings. Refer to the Parts Information for the version.

-- If equipped, check the alignment pin -4- for damage and proper seating.

Fig 1: Inspecting Refrigerant Line Connection

Courtesy of AUDI OF AMERICA, LLC

-- Check the guide ring -2- on the refrigerant line connection for damage.

-- Insert the O-ring -3- into the groove -arrow- on the refrigerant line connection -1-.

NOTE:

Coat the O-ring seals lightly with refrigerant oil prior to installation. Refer to REFRIGERANT CIRCUIT SEALS .

Ensure the proper seating of the O-ring in the groove -arrow- of the respective refrigerant line.

After securing the refrigerant lines to the A/C compressor (and installing the A/C compressor), check the line routing. They must be inserted into their designated brackets and must not make contact with other components.

Only activate the electrically-driven A/C compressor when the refrigerant circuit is filled. The A/C compressor may become damaged if the A/C compressor is run while the refrigerant circuit is empty. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function for A/C system and battery regulation.

-- Insert the refrigerant lines -1 and 4- into the respective connection on the A/C compressor.

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts -2 and 3-.

-- Evacuate and fill the refrigerant circuit. Refer to Refrigerant Circuit or Working with A/C Service Station (1 Of 2) / Working with A/C Service Station (2 Of 2) .

After completing repairs before the following work on the Climatronic Control Module - J255- control head. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

-- Switch the ignition on.

-- Retrieve the DTC memory of the Climatronic Control Module -J255- and if necessary delete the displayed error.

-- Operate the A/C system after charging the refrigerant circuit. Refer to A/C SYSTEM, STARTING OPERATION AFTER FILLING REFRIGERANT CIRCUIT .

NOTE:

Read the information for starting the A/C system after filling. Refer to A/C SYSTEM, GENERAL INFORMATION or A/C SYSTEM, OPERATING AFTER CHARGING .

Tightening Specification

Refer to OVERVIEW - A/C COMPRESSOR POWER UNIT, ELECTRICALLY-DRIVEN A/C COMPRESSOR