Audi A4 2001 - Leaking or Damaged Components Except A;C Compressor, Accumulator or Receiver - Circuit Contains Refrigerant; Compressor, Replacing Without Flushing Refrigerant Circuit

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5.2 Leaking or Damaged Components Ex‐
cept A/C Compressor, Accumulator or
Receiver - Circuit Contains Refrigerant
Refrigerant circuit still contains refrigerant (for example, with mi‐
nor leak)
– Discharge refrigerant circuit
– Remove malfunctioning component, flush with compressed
air, collect escaping refrigerant oil.
– The new component is to be filled with the amount of refriger‐
ant oil flushed out (positive 20 cm
3
for evaporator, positive 10
cm
3
for condenser, refrigerant pipes and refrigerant hoses) as
fresh refrigerant oil fill.
Note
Workshop-specific instructions, refer to Audi ServiceNet, HSO
Environment.
– Replace restrictor.
– Assemble, evacuate and charge refrigerant circuit.
5.3 Compressor, Replacing Without Flush‐
ing Refrigerant Circuit
Note
Cleaning refrigerant circuit means flushing it with refrigerant
R134a, refer to
⇒ “1.4.13 Refrigerant Circuit Flushing With Refrigerant R134a“,
page 32 or blowing through with compressed air and nitrogen,
refer to
⇒ “1.4.12 Refrigerant Circuit Flushing With Compressed Air and
Nitrogen “, page 29 ).
For example, in the event of external damage following an acci‐
dent
– Discharge refrigerant circuit
– Remove A/C compressor.
– Remove oil drain plug from A/C compressor.
Note
Different versions of the oil drain plug and its seal (it can be either
an O-ring or a gasket; always replace). Refer to
⇒ “5.1 Leaking or Damaged Components Except A/C Compres‐
sor, Accumulator or Receiver - Circuit Empty of Refrigerant“, page
191 and to the Electronic Parts Catalog (ETKA).
– To accelerate drainage of refrigerant oil, rotate compressor,
for example, by way of clutch plate of A/C clutch for example.
– Drain the old refrigerant oil from the A/C compressor* (for dis‐
posing, refer to Audi-ServiceNet, HSO Environment).
– Remove oil drain plug from replacement A/C compressor,
pour out refrigerant oil and only add a quantity of fresh refrig‐
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
5. Removal and Installation 193