audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11644 > < Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11642
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NOTE:

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It is not initially necessary to flush the refrigerant circuit with compressed air and nitrogen when this problem occurs. Normally, there is only a
small quantity of moisture in the system which can be removed by lengthy evacuation.

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If problem involving moisture in refrigerant circuit only occurs after a lengthy operating period or only infrequently (low pressure drops below
specification and evaporator ices up), it is sufficient to replace the dryer in the receiver (adjust quantity of refrigerant oil). Refrigerant circuit is
then to be evacuated for at least 3 hours.

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With this fault, evaporator may ice up although quantity of refrigerant in circuit is OK.

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Problem with Evaporator Vent Temperature Sensor G263 can also cause icing-up of refrigerant circuit. If this problem is encountered, also pay

Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11644 > < Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11642