System Overview - Refrigerant Circuit With Electrically-Driven A/C Compressor (With Or Without Battery Cooling Module)

WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The arrows indicate the refrigerant flow direction.

The following illustration shows a refrigerant circuit with an expansion valve and a second evaporator for cooling the battery and an inner heat exchanger as an example.

The layout of the refrigerant circuit is vehicle-specific. Refer to Refrigerant Circuit (vehicle-specific service information).

HD = High Pressure Side

ND = Low Pressure Side

Fig 1: Exploded View Of Refrigerant Circuit

Courtesy of AUDI OF AMERICA, LLC

Electrically-Driven A/C Compressor
- With A/C Compressor Control Module -J842- and Electrical A/C Compressor -V470-.Refer to Refrigerant Circuit (vehicle-specific service information).
Pressure Relief Valve
Condenser
- With receiver/dryer and dryer cartridge.
Receiver/Dryer
- Is a component of the condenser
Refrigerant Pressure Sensor
- Vehicle-specific versions. Refer to Refrigerant Circuit (vehicle-specific service information).
Service Connection - High Pressure Side
- With closure cap.
Refrigerant Line with Inner Heat Exchanger
Refrigerant Shut-Off Valve --
- There are different names. Refer to Refrigerant Circuit (vehicle-specific service information).
- Only on vehicles with a battery cooling module for the Hybrid Battery Unit -AX1-.
  NOTE:
  The Refrigerant Shut-Off Valve -- is for example activated, if the battery needs to be cooled and the vehicle interior is not already being cooled (open without activation).
Expansion Valve
- On the heater and A/C unit evaporator
Front Evaporator
- Heater and A/C Unit Evaporator
:Expansion Valve with Shut-Off Valve
- There are different names. Refer to Refrigerant Circuit (vehicle-specific service information).
- On the evaporator in the battery cooling module
- Only on vehicles with a battery cooling module for the Hybrid Battery Unit -AX1-.
  NOTE:
  The -Expansion Valve with Shut-Off Valve- is activated when it is necessary to cool the battery (closed without activation).
Evaporator
- Evaporator in Battery Cooling Module
- Only on vehicles with a battery cooling module for the Hybrid Battery Unit -AX1-.
Service Connection - Low Pressure Side
- With closure cap