Detaching and attaching refrigerant line at refrigerant shut-off valve 1 for hybrid battery N516 — AUDI

📋 Procedure

1. ⚠ Risk of fatal injury if high-voltage components are damaged.Observe the following when working in the vicinity of high-voltage components or wiring:It is not permitted to use cutting or forming tools, other sharp-edged tools or heat sources such as welding, brazing, soldering, hot air or thermal bonding equipment.Before starting work, visually inspect the high-voltage components in the areas involved.Before working in the engine compartment, visually inspect the power and control electronics for electric driveJX1, electric drive motor V141, air conditioner compressor V470 and high-voltage wiring. Before working on the vehicle underbody, visually inspect the high-voltage wiring and covers. Before working on the rear section of the vehicle, visually inspect the high-voltage wiring and the electro-box with the maintenance connector for high-voltage system TW . Visually inspect all potential equalisation lines.Check the following when making the visual inspection:There must be no external damage on any component. The insulation of the high-voltage wiring and potential equalisation lines must not be damaged. There must be no unusual deformation of the high-voltage wiring. All high-voltage components must be identified by a red warning sticker. — Switch off ignition.
2. Remove the plenum chamber cover General body repairs, exterior50Bulkhead; Removing and installing plenum chamber cover.
3. Discharge refrigerant circuit Air conditioner with refrigerant R134a87Refrigerant circuit.
4. Counterhold shut-off valve 1 (item 5) and unscrew union nut (4).
5. Unscrew bolt (1) and detach the refrigerant line (2) from the expansion valve and from shut-off valve 1.

6. Seal off open lines and connections with clean plugs from engine bung setVAS 6122. [Note: Seal open lines and the connections with suitable caps (to prevent damage and the ingress of dirt and moisture).]
7. Replace the O-rings ; for version, refer to Electronic parts catalogue.
8. If fitted, check that dowel pin (4) is not damaged and is seated correctly.
9. Check guide ring (2) at refrigerant line connection for damage.
10. Insert O-ring (3) in groove (arrow) in connection for refrigerant line (1). [Note: Observe fitting instructions for O-rings .After attaching, check routing of refrigerant lines. They must be inserted in brackets provided and should not make contact with other components.]
11. Replace the O-rings ; for version, refer to Electronic parts catalogue.
12. Screw on union nut (4) by hand until it makes contact, then tighten fully. [Note: When tightening the union nuts, make sure not to strain the refrigerant lines.]
13. Make sure the scuff guard (3) is positioned in the area of the brake fluid reservoir at the refrigerant line.
14. Evacuating and charging refrigerant circuit Air conditioner with refrigerant R134a87Refrigerant circuit.
15. Re-install remaining components (removed earlier).
16. Switch on ignition.
17. Interrogate event memory of operating and display unit (Climatronic control unit J255) and control unit for air conditioning compressor J842 and erase any faults displayed in "“Guided Fault Finding”" mode.
18. Start up air conditioner after charging refrigerant circuit . [Note: Also observe notes on starting up air conditioner after charging Air conditioner with refrigerant R134a87General information on air conditioner.]

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