| Detaching refrigerant lines from air conditioner compressor/attaching |
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| The air conditioner compressor without air conditioning system magnetic clutch -N25- is always driven when the engine is running. On vehicles with an air conditioner compressor without -N25-, the engine is therefore only to be started with the refrigerant circuit properly assembled. If, for example, the refrigerant lines have not been connected to the air conditioner compressor, heat generation inside the air conditioner compressor with the engine running may lead to the destruction of the compressor. The internal heat generation is caused by the air conditioner compressor operating against a fixed resistance even at approximately 0 % delivery rate (sealed circuit). |
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| As of Model Year 2012, certain vehicles with a 4-cyl. engine are gradually to be fitted with an air conditioner compressor additionally provided with an air conditioning system magnetic clutch -N25- → Chapter. In certain air conditioner operating modes (e.g. „Econ“ mode), the air conditioner compressor drive system is completely deactivated by way of this magnetic clutch. For -N25- to be actuated by the operating and display unit, Climatronic control unit -J255-, the correct version of -J255- must be fitted and correctly encoded → Electronic parts catalogue and → Vehicle diagnostic, testing and information systemVAS 5051/, ”Guided fault-finding” function. |
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| Seal open lines and the connections at the air conditioner compressor with suitable caps (to prevent the ingress of dirt and moisture). |
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| Detaching refrigerant lines at air conditioner compressor/attaching (vehicles with 4-cyl. engine) → Chapter |
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| Detaching refrigerant lines at air conditioner compressor/attaching (vehicles with 6-cyl. engine) → Chapter |
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| Detaching refrigerant lines at air conditioner compressor/attaching (vehicles with 8-cyl. FSI engine) → Chapter |
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