Solar Roof - Audi A4 2001 Owner's Manual

Heater/AC

Solar roof

Solar generator
Air conditioner
with control
system
For the first time, the A4 can optionally be
equipped with the solar roof previously used
in the A8 and A6.
The fresh air blower is continually driven by
electricity obtained from solar radiation.
The output is proportional to the intensity of
the sunlight.
Modifications to the familiar models:
– Re-engineered fresh air blower
– The DC/DC transformer has been discontin-
ued, its function is now performed by the
fresh air blower control unit J126.
80
Contacts
Significant advantages in comparison with
vehicles without solar roof are:
– lowered temperature level in vehicles
– increased efficiency of the air conditioner
– despite the reduced output of the system
Time [min]
Ventilation
parked in the sun (see chart),
as the interior temperature set is achieved
more quickly,
during the winter, an air-drying effect
occurs which effectively dehumidifies the
vehicle, reducing fogging of the windows.
SSP254_036
SSP254_035
Heating without solar
Heating with solar
Global radiation