Porsche P-80 2005, Руководство пользователя

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Sports Cars System
Climate Control Systems Diagnosis & Repair
Page 3.9
The instrument cluster provides the following information
to the A/C Control Unit:
• Ambient temperature (from the sensor at the right front)
• Engine coolant temperature
• Engine rpm
• Vehicle speed
• Parked time since ignition OFF
When the A/C system is in the automatic mode, the
processor calculates the Energy Requirement Level (ERL)
to determine the thermal energy requirements. All control
functions depend upon the ERL value. The ERL is derived
from:
• Passenger compartment actual temperature
• Passenger compartment desired temperature
• Ambient temperature
• Solar energy level
• A/C ON-OFF status
Air Conditioning, Manual Air Conditioning –
Boxster/S (987)
Functions – This air conditioning system, which enables
continuous adjustment and setting of the desired cooling
power and air flow rate (fan speed) via rocker switches
according to individual wishes, controls the temperature of
the conditioned air mixture by mixing warm and cold air in
the heater box.
Operation (manual air conditioning system)
The air conditioning system is operated by way of a
control panel (a/c controls) with integrated control unit in
the center console. The appearance of the control panel
for the manual air conditioning system is based on that of
the control panel for the automatic climate control system.
The key features of the control panel are:
• Integration of the interior temperature sensor (required
for the seat heating functions)
• Integration of the switches for heating the driver’s and
passenger’s seats (previously in the center console)
• Integration of the button for heating the rear window
(previously located beside the operating unit)
• Introduction of switches for adjusting the temperature
and fan power (higher setting = switch up, lower setting
= switch down)
• “ECO” marking (ECOnomy mode) on the button for
switching the air conditioning compressor on and off
(snowflake symbol on display goes on /off accordingly).
As a result of these changes, all of the heating functions in
the vehicle are now together in a single unit.
The following items of information can be called up
on the air conditioning display:
• Temperature and air flow rate (fan speed)
• A/C compressor on/off
• AC max mode
• Air distribution
The temperature is presented on the display by way of a
bar display. When no bar is visible, the temperature is set
to the maximum cold setting (low) When all the bars are
visible, the temperature is set to the maximum warm
setting (high)