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| The replacement compressor contains a certain quantity of refrigerant oil (at present 140 or 150 + / - 10 cm3, depending on the air conditioner compressor). This quantity of refrigerant oil corresponds to the quantity of oil specified for this refrigerant circuit on vehicles with one evaporator. On account of the greater refrigerant line length and the second evaporator, vehicles with two evaporators require more refrigerant oil in the refrigerant circuit (currently an additional 100 cm3). If the air conditioner compressor is replaced after cleaning the refrigerant circuit, this quantity of refrigerant oil therefore has to be added to the refrigerant circuit on vehicles with two evaporators (e.g. poured into open lines or component connections). If the air conditioner compressor is replaced without having to clean the refrigerant circuit, the quantity of refrigerant oil in the new air conditioner compressor to be fitted should be adjusted in line with the quantity of oil poured out of the old compressor → Chapter. |
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| As replacement air conditioner compressors are supplied with different oil capacities, the exact part number must be heeded → Electronic parts catalogue. |
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| 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. |
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| Too much oil in the circuit results in higher pressures and reduced air conditioner cooling output. Too little oil may lead to lubrication problems in the air conditioner compressor. The specified refrigerant oil quantities are therefore to be heeded. |
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| 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. |
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