S5 Quattro Coupe V8-4.2L (CAUA) (2009)
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Press on the couplings - D - and - E - until this audibly latch into the refrigerant line with inner heat exchanger connector piece - A -.
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Thoroughly clean the refrigerant lines - A - and - B - around the connection area and check for damage.
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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 retaining ring safety pins - C - must be visible on the on top of the quick acting coupling - D -.
‹› Install refrigerant pipes such that they are not strained.
‹› Check installation position of refrigerant lines to the quick acting couplings (they should not come in contact with other components).
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Evacuate and fill the refrigerant circuit.
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Install the remaining components.
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Check DTC memory of A/C control head Climatronic Control Module (J255) and erase any displayed malfunction if necessary. Refer to Vehicle
Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
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Operate the A/C system after filling the refrigerant circuit. Refer to => [ Operating A/C System after Filling Refrigerant Circuit ] See: Heating and
Air Conditioning/Description and Operation/A/C Refrigerant System
‹› Note the information regarding operating the A/C system after filling. .