| Starting up air conditioner after charging refrigerant circuit |
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| Do not start the engine until the refrigerant circuit has been assembled. |
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| If possible, only start the engine with the refrigerant circuit full. |
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| The air conditioner compressor is always driven by the pulley (there is no magnetic clutch). In no-load operation, air conditioner compressor lubrication is maintained by way of an
„internal oil circuit“ to prevent compressor damage. |
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| The air conditioner compressor is equipped with an
„internal oil circuit“ to prevent damage if the refrigerant circuit is empty. This internal lubrication is only possible if there is still a residual quantity of refrigerant oil in the air conditioner compressor. |
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| Do not start the engine unless the refrigerant circuit has been properly assembled. If, for example, the refrigerant lines are not connected to the air conditioner compressor when the engine is running, the compressor might heat up (internal heat generation) so much that this can lead to irreparable damage to the compressor. |
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| The air conditioner compressor regulating valve -N280- is not actuated if the refrigerant circuit is empty and the air conditioner compressor runs at idle with the engine. However, as there is no refrigerant in the circuit, the oil required for the lubrication of the air conditioner compressor is not transported to the compressor. |
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| All components removed have been re-installed. |
| Should it be necessary to start the engine with an empty refrigerant circuit, please observe the following: |
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| The refrigerant circuit must have been assembled completely. |
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| There must not be any vacuum in the refrigerant circuit. |
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| There must be at least a quarter of the amount of refrigerant oil specified for this refrigerant circuit in the air conditioner compressor. |
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| Engine speed must not exceed 2500 rpm. |
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| The engine should only run as long as absolutely necessary. |
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