Audi Q7 2007 Repair Manual page 249

1 - A/C Compressor Regulator
Valve - N280-
❑ Check activation and
function. Refer to
⇒ "3.8 A/C Compressor
Regulator Valve N280 ,
Checking Activation
Signal", page 30
❑ Do not remove
Note
The A/C Compressor Regulator
♦
Valve - N280- is activated by the
Climatronic Control Module -
J255- front A/C control head, it
controls pressure on low pres‐
sure side of refrigerant circuit
Certain functions on the A/C
♦
compressor regulator valve -
N280- (for example, a stuck
valve or a disruption in the coil)
can lead to a complaint regard‐
ing the A/C compressor (A/C
system doesn't cool, the evapo‐
rator ices over, etc.). If the cause
is with the A/C compressor reg‐
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
ulator valve -N280- (and not the
with respect to the correctness of information in this document. Copyright by AUDI AG.
A/C compressor itself), the A/C
compressor can be serviced by
replacing the valve -N280- . Re‐
fer to ⇒ Refrigerant R134a,
Servicing; Rep. Gr. 87 ; Refrig‐
erant Circuit Components, Re‐
placing (Refrigerant R134a,
Servicing; Refrigerant Circuit
Components, Replacing).
The A/C compressor regulator
♦
valve -N280- is not available as
a replacement part for all A/C
compressors. If the A/C com‐
pressor regulator valve -N280- is
not available as an individual A/
C compressor part (different ver‐
sions), then the entire A/C com‐
pressor must be replaced. Refer
to the Parts Catalog.
2 - Compressor
❑ For removing the A/C compressor from the bracket and installing it again (vehicles with a 6-cylinder
engine), refer to
❑ On an 8-cylinder vehicle, it is necessary to evacuate the refrigerant circuit in order to remove the A/C
compressor from the bracket. Refer to
⇒ "16.4 Compressor, Removing and Installing (Vehicles with 8-Cylinder FSI Engine)", page 283
Compressor, 8-Cylinder FSI and 8-Cylinder TDI, Removing and Installing).
❑ On a 12-cylinder vehicle, it is necessary to evacuate the refrigerant circuit in order to remove the A/C
compressor from the bracket. Refer to
⇒ "16.3 Compressor, Removing and Installing (Vehicles with 12-Cylinder TDI Engine)", page 280
Compressor, 12-Cylinder TDI, Removing and Installing).
❑ Ribbed Belt (on 6-Cylinder, 8-Cylinder TDI and 12-Cylinder TDI engines), removing. Refer to ⇒ Engine
Mechanical; Rep. Gr. 13 .
❑ Refrigerant line, disconnecting from compressor and connecting. Refer to
⇒ "15.3 Refrigerant Lines, Disconnecting from Compressor and Connecting", page 250
Heating, Ventilation and Air Conditioning - Edition 04.2013
.
⇒ "3.7 Compressor on Bracket, Removing and Installing", page 27
Audi Q7 2007 ➤
.
.
15. Refrigerant Circuit, Servicing
(A/C
(A/C
243