5 Series E60 525d (M57TU) SAL
•
IHKA High:
All 4 red bars must be displayed.
Evaporator control
The evaporator temperature is regulated with the help of the evaporator temperature sensor and a controllable
expansion valve. The evaporator temperature is set to the predefined specification of 2
°
C. Lower temperatures
are not possible due to the risk of icing.
If the "variable evaporator control" function has been encoded, the specified evaporator temperature is
calculated in the range between 2 and 7
°
C. The specification depends on the ambient temperature, the
ventilation temperature and the refrigerant pressure. A variable evaporator control reduces dehumidification.
This reduces the risk of mucous membranes drying out.
Air distribution setting
Occupants have the possibility of allowing the air distribution to be decided by the automatic program (AUTO
button). Alternatively, manual selection (defrost, ventilation, footwell) allows an individual, personal air
distribution.
Important for the optimal function of the air distribution is that the manually adjustable air vents are open.
Airflow control
The airflow control is dependent on the following settings and control actions:
•
Manual blower setting
The blower setting is made with the rotary switch in the IHKA controls.
•
Automatic blower and flap setting
The automatic blower and flap functions are activated when the AUTO button is pressed.
•
Automatic blower speed increase
The automatic blower speed increase function is available with both manual and automatic flap settings.
To make a rapid heating or cooling possible from extreme interior temperatures, the standard range of
adjustment is extended.
•
Dynamic pressure compensation
Without dynamic pressure compensation, the airflow through the fresh air grille would be increased
disproportionately with increasing road speed. This effect is compensated for by the opening angle of the
fresh-air flap being reduced as speed increases.(The road speed comes from the instrument cluster,
through the body CAN to the IHKA control unit The opening angle is regulated according to an empirically
defined map.)
•
Blower control
If needed, priority levels are transmitted (through the body CAN) from the power module consumer cutoff to
reduce the blower output.
•
Effect of terminal 50
During the starting process (terminal 50 ON), the blower is set to OFF to relieve the vehicle battery.
Sunlight adaptation (solar sensor, IHKA High only)
The influence on IHKA regulation by the solar sensor is assigned separately to the driver's side and to the front-
passenger side.
The following functions are modified when automatic mode is activated:
•
Blower (individual blower proportions of the overall blower output are increased or decreased)
•
Air stratification (stratification temperature adjusted)
SBT Integrated automatic heating / air-conditioning system (IHKA), Basic and High E6
BMW AG - TIS
12.02.2013 16:16
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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