Fiat 1996 Brava Service Manual page 574

Bravo-Brava Auxiliary units
98 range Climate control
50.
CONTROLS
The left knob (1) is for selecting the REQUESTED TEMPERATURE (between 18 and 30 °C): it is con­
nected to a potentiometer which detects the various angular positions and transmits a signal to the elec­
tronic control unit for a total of 15 different positions (one per degree centigrade) with two extreme po­
sitions "LO" ana* " H I " corresponding to the maximum cold and maximum hot settings, respectively.
The centre knob (2) is for adjusting the AIR VENTILATION: it is also connected to a potentiometer
which detects the various angular positions and sends a signal to the electronic control unit. There are
four possible air flow rates which can be set manually (1, 2, 3 and 4), whilst in the "AUTO" position the
system itself autbmatically selects the most suitable flow rate for reaching or maintaining the desired
temperature.
NOTE Position "0" indicates minimal ventilation: the fan is off and there is only a slight flow of air at
the vents.
With the compressor on, the fanis always "forced" at the first speed, even with the knob at "0".
NOTE There are two different maps inside the control unit which correlate the air flow rate and the
speed of the fan: the pollen filter on the outside air inlet ensures that the flow rate is lower - in
relation to the fan speed - in the "dynamic air" condition compared with the "recirculation"
condition.
The right knob (3) is for selecting the FLOW DISTRIBUTION for the air towards the passenger com­
partment and is achieved in five different ways: the selection is made manually via a cable which con­
trols the movement of the distribution flaps.
Pressing button (4) enables the operation of the COMPRESSOR (air refrigeration circuit); if the button
is released, the operation ceases. Engagement is entirely manual: the compressor is only always enabled
in the "MAX DEF" setting even with the button released.
Pressing button (5) engages the AIR RECIRCULATION function inside the passenger compartment; re­
leasing the button produces a "dynamic"air flow from the outside.
Engagement is entirely manua): the recirculation function is only excluded in the "MAX DEF" setting
even if the button is pressed.
Copyright by Fiat Auto
3