| Renewing refrigerant circuit components |
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| All refrigerant circuit components which are sent for quality control must always be closed (use the original plugs from the spare part). |
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| Compressor parts, collected tank, liquid tank, evaporators and condenser are, until now, filled with nitrogen gas. This filling will now gradually be stopped, or else the pressure of the nitrogen will be so low that the gas will not be heard escaping when the component is first opened. |
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| In vehicles without an electromagnetic coupling on the compressor, the engine must only be started if the refrigerant circuit is completely assembled (the compressor operates constantly at the same time). |
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| To prevent damage to the air conditioner compressor when the refrigerant circuit is empty, air conditioning system compressor regulating valve -N280- (without electromagnetic coupling), it is equipped with a protected oil supply. This means that approx. 40 to 50 cm3 of refrigerant oil remains in the air-conditioner compressor. → Chapter |
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| As spare parts in the spare parts catalogue are stored at different locations over longer periods, when opening for the first time (also genuine spare parts of the same series) gas may escape in some cases and not in other cases. For this purpose, carefully remove the caps of the connections on the genuine parts to allow the nitrogen gas to escape slowly. |
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| The refrigerant circuit contains a choke and a collecting tank, or else an expansion valve and a liquid tank. |
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| Close any open connections and hoses (to prevent humidity from entering). |
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| Always replace the choke. |
| The collecting tray / liquid container, the dryer bag or the dryer cartridge must not be replaced when the following conditions are fulfilled: |
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| After an accident, the collecting / liquid tank have not been damaged. |
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| The repair is carried out in a brief period of time (no longer than standard repair time) and no humidity has entered. The vehicle is no more than 5 years old. |
| The collecting / liquid tank or the desiccant cartridge must be replaced if the following conditions are met. |
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| The refrigerant circuit was opened and the vehicle is more than 5 years old. |
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| The refrigerant circuit has been open for an indefinite period of time (slow leak). |
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| The repair time is longer than usual, and humidity has entered. |
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| After blowing through with compressed air / nitrogen or rinsing with the refrigerant R134a, the collecting tray / liquid container or the dryer cartridge must always be replaced. Keep the genuine spare parts in their original packing as long as possible to prevent them from getting wet. |
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| The air-conditioner compressor is blocked. |
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| The collecting / liquid tank is damaged (accident). |
Caution | The used refrigerant oil will be handled in the same way as old oil with unknown origin. |
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