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Fan Wiring 101 ? - Page 2

post #11 of 34
Since this is a variable speed controller using a potentiometer to control the voltage to the fans, I doubt very much that the yellow wire on the controller is an RPM monitoring or controlling wire in this instance.

Edit - There's no connection to the motherboard by this controller for the fans ... it is simply a "splitter" for a 4-pin molex that branches out to Four 3-pin fan connectors.
post #12 of 34
Thread Starter 
Quote:
Since this is a variable speed controller using a potentiometer to control the voltage to the fans, I doubt very much that the yellow wire on the controller is an RPM monitoring or controlling wire in this instance.

Edit - There's no connection to the motherboard by this controller for the fans ... it is simply a "splitter" for a 4-pin molex that branches out to Four 3-pin fan connectors.
so these fans will not work with this fan controller ? or they will ?
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post #13 of 34
If they're 12v fans they won't start with less then 7v. So, you'll have to turn the pot half way to get them to spin up.

If you're still not sure which wires, just turn the pot all the up and start trying wires.
  
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post #14 of 34
Quote:
Originally Posted by Dryadsoul View Post
If they're 12v fans they won't start with less then 7v. So, you'll have to turn the pot half way to get them to spin up.

If you're still not sure which wires, just turn the pot all the up and start trying wires.
Thats not always true. It depends largly on the fan size, bearing type and life left in the bearings. All my fans start up at 5v. My Delta with a semi burned out engine will run at 5v if I start it with a push.
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post #15 of 34
Thread Starter 
i have tried every possible combination of wiring...this fan controller must not have the specs its advertised to.
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post #16 of 34
The connections on Delta's fans are a bit odd. Make sure you have the black wire on the Delta connected to the black line on the fan controller. make sure the same is with the red line. Also remember to have the fan controller turned up all the way, this fan controller (I have one too) goes from 5v to 12v. If you still can't get it to work, try testing just the fan on a seperate PSU.
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post #17 of 34
Thread Starter 
if i use the 5v mod to the molex connector...they run slow so they should run with less than adaquate voltage.....this controller must need the sensor wire for regulation...i dunno , i cant have these fans running at full speed all the time as they are very loud at full throttle....there must be a way to do this.
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post #18 of 34
Quote:
Originally Posted by xtcrulez View Post
if i use the 5v mod to the molex connector...they run slow so they should run with less than adaquate voltage.....this controller must need the sensor wire for regulation...i dunno , i cant have these fans running at full speed all the time as they are very loud at full throttle....there must be a way to do this.
I'll hook mine up with just a two pin and see if it works.
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post #19 of 34
Quote:
Originally Posted by Mootsfox View Post
I'll hook mine up with just a two pin and see if it works.
Nope, works fine with a 2pin fan.
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post #20 of 34
Thread Starter 
so that means there's not enough voltage from the controller to move these ?
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