| Extract the refrigerant circuit using the air conditioning service station. |
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| Depending on the type of tools chosen, there may be differences in the work process (the specific handling instructions for each tool must be taken into account). |
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| The refrigerant circuit must be emptied if any parts of the refrigerant circuit are to be disassembled, if there is any doubt about the amount of refrigerant in the circuit or if required by the safety measures. |
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| All fundamental instructions for working with the air-conditioning service station can be obtained from the respective operating instructions of the air-conditioning service station. |
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| Connect the air-conditioning service station to the service connections of the vehicle when observing the respective operating instructions → Rep. gr.87 and put into operation. |
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| Take into account that, besides the refrigerant, some refrigerant oil may also be sucked out of the refrigerant circuit. In order to ensure that the compressor is correctly lubricated, new refrigerant oil must be added to the circuit → Rep. gr.87. |
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| In vehicles without electromagnetic coupling on the compressor (with air conditioning system compressor regulating valve -N280-), the engine should run for < 10 minutes with an empty and closed refrigerant circuit (The air conditioner compressor always runs simultaneously). The engine speed must not exceed 2000 rpm. |
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| The engine can be started in vehicles with electromagnetic coupling on the compressor, because the air conditioner pressure switch -F129- or the high-pressure sender -G65- (checks if refrigerant is in the refrigerant circuit) separates the electromagnetic coupling when no refrigerant is located in the refrigerant circuit. |
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