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

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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 - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a , REFRIGERANT CIRCUIT R134a .

HD = High Pressure Side

ND = Low Pressure Side

Fig 1: Refrigerant Circuit With Electrically-Driven A/C Compressor (With Or Without Battery Cooling Module) Component Locations

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 The Appropriate Service Information. ELECTRIC A/C COMPRESSOR / REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a , / REFRIGERANT CIRCUIT COMPONENTS, REPLACING R134a .
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 A/C PRESSURE/TEMPERATURE SENSOR -G395-, REMOVING AND INSTALLING and HIGH PRESSURE SENSOR -G65-, REFRIGERANT CIRCUIT PRESSURE SENSOR -G805- .
Service Connection - High Pressure Side
- With closure cap.
Refrigerant Line with Inner Heat Exchanger
Refrigerant Shut-Off Valve
- Different names. Refer to the appropiate service information HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 1 -N516-, REMOVING AND INSTALLING and EXPANSION VALVE WITH HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 2 -N517 .
- 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
- Different names. Refer to the appropriate service information, HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 1 -N516-, REMOVING AND INSTALLING and EXPANSION VALVE WITH HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 2 -N517 .
- 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 the 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