Removing and installing refrigerant shut-off valve for high-voltage battery heat exchanger N542 — VW

🧭 Before you start

Fits: VW Golf VII Variant (BA), VW Golf VII (5G, 2012–2020)

• Opens: refrigerant (A/C)
• Also covered elsewhere: Electronic Parts Catalogue

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• Loosen union nuts (C). Counterhold on N542(B) while doing so.
• Adhere to the installation instruction for seals (B).Following attachment, check the routing of the refrigerant lines. They must be inserted in the holders provided and not make contact with other components.

📋 Procedure

1. Observe safety precautions Safety precautions when handling refrigerants.
2. Comply with notes Working on refrigerant circuit.
3. Observe safety precautions when working in the vicinity of high-voltage components Safety precautions when working in the vicinity of high-voltage components.
4. Observe the risk category of the high-voltage system 00Risk category of the high-voltage system.
5. Switch off ignition.

6. Drain refrigerant circuit.
7. Disconnect connector (A) from N542(B).
8. Loosen union nuts (C). Counterhold on N542(B) while doing so.
9. Remove refrigerant line (D) from heat exchanger for high-voltage battery .
10. Remove shut-off valve N542(D). [Note: Adhere to the installation instruction for seals (B).Following attachment, check the routing of the refrigerant lines. They must be inserted in the holders provided and not make contact with other components.]
11. Renew seals (B); for correct version refer to Electronic Parts Catalogue.
12. Check restrictor in refrigerant line (D) (leading to heat exchanger for high-voltage battery) for soiling .
13. Screw on union nuts (C) to stop by hand.
14. Install refrigerant line (D) to heat exchanger for high-voltage battery .
15. Tighten union nuts (C). Counterhold on N542(B) while doing so, and make sure that refrigerant lines are routed free of stress. [Note: When tightening the union nuts, make sure that the refrigerant lines remain free of stress.Following attachment, check the routing of the refrigerant lines. They must be inserted in the holders provided and not make contact with other components.Also refer to the notes on commissioning of air conditioning system after filling Air conditioning system with refrigerant R134a00Working with air conditioner service station.]
16. Evacuate and charge refrigerant circuit Air conditioner with refrigerant R134a00Working with air conditioner service station.
17. Switch on ignition.
18. Read event memory of operating unit, Climatronic control unit J255, and clear any faults which may have been stored vehicle diagnostic tester in "“Guided fault finding”" mode.

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