Refrigerant Lines, Disconnecting From Quick-Release Couplings And Connecting: Installing

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Installation is done is reverse order, observe the following:

Fig 1: Installation Is Done Is Reverse Order, Observe Following

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

Danger of leakage.

The couplings -B and C- on the refrigerant line -D- with inner heat exchanger must be replaced each time the refrigerant line is opened.

-- Pry the couplings -B and C- using a screwdriver -A- out of the refrigerant line -D- with inner heat exchanger -arrow-.

-- Thoroughly clean all parts of the refrigerant line connections (for example, using Cleaning Solution:D 009 401 04 ).

Fig 2: Identifying Parts Of Refrigerant Line Connections

Courtesy of AUDI OF AMERICA, LLC

-- Check the connector -A- for the refrigerant line with inner heat exchanger for damage.

-- Replace the O-rings -B and G-, the support rings -C and F- and the couplings -D and E-. Refer to the Parts Information.

NOTE:

Follow the instructions for installing the O-rings. Refer to REFRIGERANT CIRCUIT SEALS .

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

-- Press on the couplings -D and E- until this audibly latch into the refrigerant line with inner heat exchanger connector piece -A-.

-- Thoroughly clean the refrigerant lines -A and B- around the connection area and check for damage.

Fig 3: Identifying Refrigerant Lines -A- And -B-

Courtesy of AUDI OF AMERICA, LLC

-- Install the refrigerant lines -A and B- all the way so that they are free of tension.

Check for Correct Installation of the Refrigerant Lines.

Try to disconnect the refrigerant lines -A and B- ; the stop must be felt.
The pins -B- on the retaining ring must be visible on the quick-release coupling, version -A- (installed at SOP) when the locked refrigerant line -C- is pulled in direction of -arrow-.

Fig 4: Identifying Quick-Release Coupling Versions
Courtesy of AUDI OF AMERICA, LLC
On the quick-release coupling -D- (running change from MY 2010), the ring -E- must come out of the quick-release coupling -D-, when, after assembling, the locked refrigerant line -C- is pulled in direction of -arrow-. Then the ring -E- can be removed from the refrigerant line -C-.

NOTE:

Install the refrigerant lines such that they are not strained.

Check installation position of refrigerant lines to the quick-release couplings (they should not come in contact with other components).

-- Evacuate and charge the refrigerant circuit. Refer to REFRIGERANT CIRCUIT (Refrigerant R134a Servicing, Refrigerant Circuit, Working with A/C Service Station) or A/C SYSTEM, GENERAL INFORMATION .

-- Turn on the ignition.

-- Install the remaining removed components.

-- Turn on the ignition.

-- Check the DTC memory for the Climatronic Control Module -- display and control head and erase any displayed malfunctions, if necessary using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

-- Operate the A/C system after filling 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 . After recharging, before activating the A/C system.