Heater and A/C Unit Refrigerant Cut-Off Valve (N541)

Heater and A/C Unit Refrigerant Cut-Off Valve (N541)

Special tools, testers and auxiliary items required

• Torque Wrench (V.A.G 1331/) (5 to 50 Nm)

• ROB 134APF or succeeding model.

Removing

- When working on the refrigerant circuit, note the information, refer to => [ Refrigerant Circuit, Specialized Repairs ] Procedures.

• Refrigerant must be extracted before hand using ROB 134APF.

• The previously used service stations can still be used. Refer to workshop equipment catalog.

• To prevent the entry of dampness all components of the refrigerant circuit which have been opened must be sealed with suitable plugs.

- Disconnect the connector - 1 - from Heater and A/C unit refrigerant cut-off valve - 2 -.







Danger due to refrigerant coming out under pressure.

Danger of frost bite to skin and other parts of the body.

• Extract the refrigerant and immediately open the refrigerant circuit after that.

• If the refrigerant was extracted more than 10 minutes in the past and the refrigerant circuit was not opened, extract the refrigerant again. Pressure in the refrigerant circuit is caused by evaporation.

- Remove union nut - 3 - from Heater and A/C unit refrigerant cut-off valve - 2 -.

- Remove heater and A/C unit refrigerant cut-off valve - 2 -.

Installing

Installation is carried out in the reverse order while noting the following:

• Note the direction of coolant flow when installing (arrow on component).

• When filling and emptying with coolant, the heater and A/C unit refrigerant cut-off valve and the high voltage battery heater core refrigerant cut-off valve (N542) must be open.

• Use a voltage of 12 V for the shut-off valves when filling and emptying with coolant.