Refrigerant Lines at Inner Heat Exchanger, Disconnecting and Connecting

Refrigerant Lines at Inner Heat Exchanger, Disconnecting and Connecting

Special tools, testers and auxiliary items required

• Engine Bung Set (VAS 6122)

Removal






- Drain the refrigerant circuit.

- Unscrew the screws - 1, 2 - and remove the refrigerant lines - 3, 4 -.

- Seal open lines and connections with a clean plug from the (VAS 6122).

Installation






Installation is done in reverse order, observe the following:

• Tightening specification, refer to => [ Refrigerant Lines, Condenser, Expansion Valve, A/C Compressor Overview ] Refrigerant Lines, Condenser, Expansion Valve, A/C Compressor Overview.

- Replace the O-ring seals. Refer to Electronic Parts Catalog (ETKA).

- Check the alignment pin - 4 - for damage and proper seating.

- Check the guide ring - 2 - at the refrigerant line connection for damage.

- Insert the O-ring seal - 3 - in the groove - arrow - at the refrigerant line connection - 1 -.

• Coat the O-ring seals lightly with refrigerant oil prior to installation. Refer to => [ Refrigerant Circuit O-rings ] Refrigerant Circuit O-Rings.

• Check the O-ring seals for proper seating in the groove - arrow - of the respective refrigerant line.

• Following attachment, check routing of refrigerant pipes. They must be inserted in holders provided and not make contact with other components.

- Insert the refrigerant lines - 3, 4 - into each connection.






- Tighten the screws - 1, 2 -.

- Evacuate and fill the refrigerant circuit.

- Operate the A/C system after filling the refrigerant circuit. Refer to => [ A/C System, Operating After Filling Refrigerant Circuit ] A/C System, Operating After Filling Refrigerant Circuit.

After completion of the repair work, perform the following work on the control head using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function:

- Read out the event memory and erase any displayed entries.