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| Only start engine after refrigerant circuit has been assembled. |
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| After installing a new air conditioner compressor or filling with fresh refrigerant oil (e.g. after blowing out refrigerant circuit), turn AC compressor poly V-belt pulley 10 revolutions by hand before starting engine. This will prevent damage to the air conditioner compressor. |
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| Only start engine when refrigerant circuit is full. |
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| The air conditioner compressor is driven permanently by the poly V-belt pulley (not fitted with a magnetic clutch). |
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| If an air conditioner compressor seizes, the overload protection separates from the air conditioner compressor shaft. The seizure can normally be detected by the bulges in the poly V-belt pulley. Another indication of a seizure is abraded rubber material around the poly V-belt pulley. |
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| The air conditioner compressor has an internal oil circuit to ensure that the air conditioner compressor is not damaged when the refrigerant circuit is empty. This means that about 40 to 50 cm3 refrigerant oil remain in the air conditioner compressor. |
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| The engine may be started only when the refrigerant circuit is properly assembled. If, for example, the refrigerant lines are not connected to the air conditioner compressor and the engine is running, the compressor may heat up so much through internal warming that it will be destroyed. |
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| Air conditioning system compressor regulating valve -N280- is not activated when the refrigerant circuit is empty and the air conditioner compressor idles with the engine. |
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| If it is necessary to start engine with an empty refrigerant circuit: |
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| The refrigerant circuit must be fully assembled. |
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| At least ¼ of the quantity of refrigerant oil specified for this refrigerant circuit must be in the air conditioner compressor. |
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| The engine speed must not exceed 2000 rpm. |
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| Run engine only as long as absolutely necessary, max. 10 min. |
Note | Note the following when starting engine for first time after filling refrigerant circuit: |
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| Start engine with air conditioner compressor switched off (operating mode „Econ“) and wait until idling speed is stable. |
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| Set temperature to „Lo“ on Climatronic operating and display unit -E87-. |
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| Switch air conditioner compressor (operating mode „Auto“) and let air conditioner run for at least 5 minutes with engine at idling speed. |
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