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Note
♦
Overfilling with refrigerant oil can occur if, for example, the
compressor has been replaced without adjusting the quantity
of refrigerant oil.
♦
If expansion valve is malfunctioning (permanently open),
evaporator temperature is no longer regulated such that only
refrigerant in gaseous state exits from the evaporator. Under
certain usage conditions, liquid droplets may then be drawn in
by the compressor and cause noise (liquid cannot be com‐
pressed).
♦
If there is too much refrigerant oil in the circuit, the compressor
must be drained and the accumulator must be replaced. After
cleaning the refrigerant circuit (flushing with refrigerant R134a,
refer to
⇒ “1.4.13 Refrigerant Circuit Flushing With Refrigerant
R134a“, page 32 or blowing through using compressed air and
nitrogen, refer to
⇒ “1.4.12 Refrigerant Circuit Flushing With Compressed Air
and Nitrogen “, page 29 ) the correct quantity of refrigerant oil
is filled into the circuit, refer to
⇒ “3.4 Refrigerant Oil Capacities“, page 119 .
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
190 Rep. Gr.00 - General, Technical Data
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