A4 Mk2
| Capacities for Audi A6 (4G_) 2011 ►, Audi A7 (4G_) 2011 ►, Audi A6 hybrid (4G_) 2012 ► |
| Characteristics of refrigerant circuit: |
| l | Expansion valve |
| l | Receiver |
| l | Refrigerant line with internal heat exchanger |
| l | „Denso“ air conditioner compressor with air conditioner compressor regulating valve -N280- → Air conditioning; Rep. gr.87 (vehicle-specific workshop manual) and → Electronic parts catalogue |
| Vehicle model | Production period | Total quantity of oil in refrigerant circuit in cm3 | Quantity of refrigerant oil in replacement compressor in cm3 | Differing characteristics of this refrigerant circuit | ||
| Audi A6 | From 02.11 onwards | 120 + / - 10 | 120 + / - 10 |
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| Audi A7 | From 10.10 onwards | 120 + / - 10 | 120 + / - 10 |
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| Audi A6 hybrid | From 11.11 onwards | 160 + / - 20 | 160 + / - 20 |
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Note| t | The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the air conditioner compressor is therefore to be adjusted → Chapter. |
| t | At the start of production, all vehicles except the Audi A6 hybrid were fitted with mechanically driven air conditioner compressors manufactured by „Denso“. Air conditioner compressors produced by other manufacturers may also be fitted at a later date → Electronic parts catalogue and → Air conditioning; Rep. gr.87 (vehicle-specific Workshop Manual). |
| t | At the start of production, the Audi A6 hybrid is fitted with an electrically driven „Denso“ air conditioner compressor (electrical air conditioner compressor -V470- with control unit for air conditioning compressor -J842-). There is no provision for an air conditioner compressor regulating valve -N280- on this air conditioner compressor. |
| t | At the start of production, the Audi A6 hybrid was fitted with an air conditioner compressor with a refrigerant oil quantity of 200 ccm. Shortly after the start of production, the refrigerant oil quantity was reduced to 160 ccm. The refrigerant oil does not have to be reduced on vehicles fitted with an air conditioner compressor with a refrigerant oil quantity of 200 ccm. However, if the refrigerant circuit has been flushed for example, a total of 160 ccm should also be filled in in this vehicle as the specified refrigerant oil quantity. The correct amount of refrigerant oil will already be filled into a replacement air conditioner compressor → Electronic parts catalogue. |
| t | This air conditioner compressor is available as a replacement part with different oil capacities and attention must therefore be paid to the oil quantity in the air conditioner compressor as well as to the exact part number → Air conditioning; Rep. gr.87 (vehicle-specific workshop manual) and → Electronic parts catalogue. |
| t | The different oil quantities in the air conditioner compressor may result from the design of the air conditioner compressor (with or without oil separator at high-pressure connection) or, in the case of identical air conditioner compressors, from the design of the refrigerant circuit. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and a reduced cooling output of the system. Too little oil may lead to lubrication problems in the air conditioner compressor. |
| t | The air conditioner compressor may have been fitted at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the air conditioner compressor. |
