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Thread: Fan Blower Settings Q

  1. #1
    Join Date
    Nov 2006
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    Maryland
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    703

    Default Fan Blower Settings Q

    What's the first sextion for? The solid line that gets thicker from OFF to the 1 position?

  2. #2
    Join Date
    Feb 2004
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    4,894

    Default

    various speed between off and 1

  3. #3
    Join Date
    Nov 2006
    Location
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    Default

    On my car, it feels the same as 1 through out the whole rotation between 0 and 1.

  4. #4
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
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    14,839

    Default

    if you are moving it will, when you sit still I notice a difference, slight but at the lowest definitely not like on #1

    Quote Originally Posted by ///Sniper535 View Post
    On my car, it feels the same as 1 through out the whole rotation between 0 and 1.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  5. #5
    Join Date
    May 2004
    Location
    Japan
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    9,250

    Default

    the whole system is speed dependent and temperature dependent. If you want t study that complicated system, >50 pages in German here
    Klimaautomatik IHKA (German language PDF) 2.1 MB

    http://www.e38.org/e32/klimaautomatik.pdf
    The control module gets a speed signal for adjusting the fresh air flaps and the speed of the blower motor. Page 11.
    Page 15: Luftmengenwaehlrad

    Als elektrische Stellglied fuer die Luftmenge dient ebenfalls ein Drehpotentiometer. In Stellung 0 ist die Anlage ausgesschaltet (sowie die ganze Funktionsbeleuchtung) mit Ausnahme des Drefrost-Programms, d.h. Geblaese aus, alle Klappen in Zu-Position.
    In der ersten Raste des geblaeserades laeuft das Geblaese konstant mit 4.5 V. Spannung. In Stellung "MAX" wird euber einen Endlagenschalter ein Relais, das in der geblaeseendstufe integriert ist, angesteuert und damit die Geblaesendstufe ueberbrueckt. (Bordnetztspannung am Geblaese). Im dazwischenliegenden Keilbreich (am Waehlrad) erfolgt eine stufenlose Geblaesedrehzahlregelung.
    translate with google

    Then go to page 33:
    fan speed adjustment
    the volume is influended by
    -thumbwheel
    -step size Y
    -speed
    -cold start locking

    0= switched off
    step 1 = fans runs at 4.5V if the heater core temp. is >50 degree C.
    if the heater core temp is <20 dedree C, then there will be only 3V.= cold start locking.
    between 20-50 degree C is a linear increase.

    and much more.......

    then go to page 35
    influence of speed to blower fan volume......

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