| After cleaning the refrigerant circuit, e.g. due to moistness (the refrigerant circuit was left open over a longer period) or dirt having entered |
| The collecting / liquid tank or the desiccant bag / cartridge do not need to be replaced if the following conditions are met. |
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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). |
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| Drain refrigerant circuit. |
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| Remove air conditioner compressor. |
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| Eliminate the cause of the fault. |
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| Inspect the expansion valve. Replace if any dirt or corrosion is found. |
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| Remove the compressor oil drain plug. |
Note | The „Denso/Nippondenso“ compressor has a seal instead of an O-ring on the oil drain plug, which must always be replaced → Parts catalogue. |
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| To facilitate draining the refrigerant oil, turn the compressor by the electromagnetic coupling disc. |
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| Then fill air conditioner compressor with a quantity of fresh refrigerant oil corresponding to quantity of refrigerant oil in original compressor → Rep. gr.87. |
Note | t
| Use different types and amounts of refrigerant oil for different air-conditioner compressors → Rep. gr.87. |
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| To ensure proper lubrication of the compressor, fill at least 80 cm 3 of refrigeration oil into the compressor; the remaining oil can be filled into the new receiver/dryer, for example → Rep. gr.87. |
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| If any dirt has entered the compressor while the refrigerant circuit is open (e.g. after an accident), the compressor must be replaced. |
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| Replace liquid tank or collecting tank and choke. |
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| Assemble, vacuum and charge the refrigerant circuit. |
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