Audi Workshop Service and Repair Manuals > A4 Mk1 > Heating, ventilation, air conditioning system | Air conditioner with refrigerant R134a | Air conditioner | Checking pressures | Checking pressures on vehicles with an expansion valve and receiver (with internally regulated air conditioner compressor)

Specifications for pressures in refrigerant circuit > < Specifications for pressures in refrigerant circuit

Checking pressures on vehicles with an expansion valve and receiver (with internally regulated air conditioner compressor)

Checking pressures on vehicles with an expansion valve and receiver (with internally regulated air conditioner compressor)

Note

t	Connect air conditioner service station → Chapter.

t	Observe test requirements → Chapter.

–	Check the pressures in the refrigerant circuit (with the air conditioner service station) with the ignition switched off → Chapter.

The pressures with the ignition switched off correspond to the specifications.

–	Start engine.

–	Set engine speed to 2000 rpm.

–	Observe the pressure reading (e.g. pressure gauge) of the air conditioner service station.

Note

t	Switching pressures and design of refrigerant circuit switches are vehicle-specific.

t	The pressures must be measured at the service connections; the fitting locations of these connections are vehicle-specific → Heating, air conditioning; Rep. gr.87 or → Air conditioning; Rep. gr.87 (vehicle-specific workshop manual).

t	Specifications for pressures in refrigerant circuit → Chapter

Heating, ventilation, air conditioning system
Air conditioner with refrigerant R134a / Air conditioner
Checking pressures
Checking pressures on vehicles with an expansion valve and receiver (with internally regulated air conditioner compressor)

Specifications for pressures in refrigerant circuit > < Specifications for pressures in refrigerant circuit