TSB : Refrigerant Circuit With An Electrically Driven A/C Compressor (With And Without Battery Cooling Module)

Details

Vehicles with a High-Voltage System (Hybrid Vehicles) WARNING: Extremely Dangerous Due to High-Voltage The high-voltage system is under high-voltage. Death or serious bodily injury by electric shock. -- Individuals with electronic/medical life- and health sustaining machines in or on their person cannot perform any work on high-voltage systems. Life- and health sustaining machines are for example pain killer pumps, implanted defibrillators, pacemakers, insulin pumps, and hearing aids. -- Have the high-voltage system de-energized by a qualified person. WARNING: There is a Risk of Injury from the Engine Starting Unexpectedly On electric - hybrid vehicles an active ready mode is difficult to identify. Parts of the body can be clamped or pulled. -- Turn off the ignition. -- Place the ignition key outside of the vehicle interior. WARNING: Risk of Damaging the High-Voltage Cables Misuse can damage the insulation of high-voltage cables or high-voltage connectors. -- Never support objects on the high-voltage cables and the high-voltage connectors. -- Never support tools on the high-voltage cables and the high-voltage connectors. -- Never sharply bend or kink the high-voltage cables. -- When connecting pay attention to the coding of the high-voltage connectors. For all procedures on vehicles with high-voltage system pay attention to the additional warning message for these vehicles. Refer to WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM . If procedures are necessary near components of the high-voltage system "perform a visual inspection of the damage of the high-voltage components and lines". Refer to PERFORMING A VISUAL INSPECTION OF DAMAGE TO HIGH VOLTAGE COMPONENTS AND CABLES . If work on the components of the high-voltage system is necessity, de-energize the high-voltage system. Refer to the appropriate service information. . NOTE: The following illustration shows a refrigerant circuit as an example, as it is installed in an Audi Q5 hybrid, for the design of the refrigerant circuit in the respective vehicle refer to the vehicle-specific repair information. Refer to Refrigerant Circuit (vehicle-specific repair information). -Arrows- Point in Direction of Refrigerant Flow. Fig 1: Identifying A/C Compressor Circuit And Electrical Flow Courtesy of AUDI OF AMERICA, LLC Electrically-Driven A/C Compressor With A/C Compressor Control Module -J842- and Electrical A/C Compressor -V470- Condenser With receiver/dryer and dryer cartridge Service Connection, HP Side Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- Only for vehicles with a battery cooling module for the Hybrid Battery Unit -AX1-. NOTE: The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- is activated, for example, if it is necessary to cool the battery and no cooling is desired in the passenger compartment (open without activation). Expansion Valve On the evaporator in the A/C system Evaporator Evaporator in the A/C System Expansion Valve with Hybrid Battery Refrigerant Shut-Off Valve 2 -N517- On the evaporator in the battery cooling module Only for vehicles with a battery cooling module for the Hybrid Battery Unit -AX1-. NOTE: The Hybrid Battery Refrigerant Shut-Off Valve 2 -N517- is activated if it is necessary to cool the battery (closed without activation). Evaporator Evaporator in the battery cooling module Only for vehicles with a battery cooling module for the Hybrid Battery Unit -AX1-. Service Connection, LP Side