| Additional work on vehicles with AC compressor without magnetic coupling |
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| The engine must only be started if the refrigerant circuit is correctly assembled (compressor operates). |
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| If possible, only start the engine if the refrigerant circuit is filled. |
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| The engine must on no account be started if vacuum is present in the refrigerant circuit (in case of evacuating with an A/C service station). This would result in mechanical damage of the compressor. |
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| If the engine runs with an empty refrigerant circuit (no vacuum must be present in the circuit), an increase in its revolutions must be absolutely avoided. There must be at least a quarter of the refrigerant oil volume present in the AC compressor, which is prescribed for this refrigerant circuit and the engine may be run for max. 10 minutes. |
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| So that the AC compressor suffers no damage when the refrigerant circuit is empty, it is fitted with a secured oil supply. This means that approx. 40 to 50 cm3 of refrigerant oil remains in the AC compressor. |
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