fan stalls

  • Thread starter Thread starter Lurch
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Lurch

My Aero7+ only shakes a bit every 2 seconds,
it worked @ about 10v. for 3 months.
After I turned it down to 7 volt,
it stalled after a couple of hours...

What can be wrong with it?

tia Lurch
 
Lurch said:
My Aero7+ only shakes a bit every 2 seconds,
it worked @ about 10v. for 3 months.
After I turned it down to 7 volt,
it stalled after a couple of hours...

What can be wrong with it?

tia Lurch

If it's a 12volt fan...I think that what you are seeing is to be expected...
turn the voltage back up of course!
 
Lurch said:
My Aero7+ only shakes a bit every 2 seconds,
it worked @ about 10v. for 3 months.
After I turned it down to 7 volt,
it stalled after a couple of hours...

What can be wrong with it?

Not enough voltage?

DC fans require more startup voltage as they age or get dirty. Either
clean the fan real well, or raise the voltage closer to the nominal +12v.
 
My Aero7+ only shakes a bit every 2 seconds,
it worked @ about 10v. for 3 months.
After I turned it down to 7 volt,
it stalled after a couple of hours...

What can be wrong with it?

tia Lurch

What's the question?
It's not able to run at 7V, needs higher.
Doesn't it have a speed-controller?

Some fans (I don't know about that one) have an internal voltage
regulator... it's set and variable by external POT, but if the input
voltage drops below the regulator's set output, (or actually, even
over that voltage, there is a Vdrop inherant to it) the fan will stop.

The curious part is that the fan starts and THEN stops, later. Is it
possible your power supply is slightly dropping the 12V rail for
whatever reason? How are you obtaining the "7V" reading?
 
kony said:
My Aero7+ only shakes a bit every 2 seconds,
it worked @ about 10v. for 3 [edit: weeks]
After I turned it down to 7 volt,
it stalled after a couple of hours...

What can be wrong with it?

tia Lurch

What's the question?
It's not able to run at 7V, needs higher.
Doesn't it have a speed-controller?

Some fans (I don't know about that one) have an internal voltage
regulator... it's set and variable by external POT, but if the input
voltage drops below the regulator's set output, (or actually, even
over that voltage, there is a Vdrop inherant to it) the fan will stop.

The curious part is that the fan starts and THEN stops, later. Is it
possible your power supply is slightly dropping the 12V rail for
whatever reason? How are you obtaining the "7V" reading?

The fan was installed correctly, and worked correctly for a couple
of weeks, since temperatures were OK, I turned it down to lower
RPM, with the attached potmeter, and then it stopped, and just
wiggles a bit. I didn't obtain the voltages, I estimated it from the
way I turned down the potmeter. Better to say it ran @ 75% for
3 weeks, and it stalled @ 40 % of the max setting

It seems like its stuk between the north and south poles of the magnets.
It turns freely, but no electric power is able to pull it trough the
resistance of the magnets.

I've made a small video of the fan, a 5.8 Mb avi, in a zipfile
www.smokestackdesign.com/aero7stalled.zip
hope this sheds some light on the problem.

Lurch
 
The fan was installed correctly, and worked correctly for a couple
of weeks, since temperatures were OK, I turned it down to lower
RPM, with the attached potmeter, and then it stopped, and just
wiggles a bit. I didn't obtain the voltages, I estimated it from the
way I turned down the potmeter. Better to say it ran @ 75% for
3 weeks, and it stalled @ 40 % of the max setting

It seems like its stuk between the north and south poles of the magnets.
It turns freely, but no electric power is able to pull it trough the
resistance of the magnets.

I've made a small video of the fan, a 5.8 Mb avi, in a zipfile
www.smokestackdesign.com/aero7stalled.zip
hope this sheds some light on the problem.

http://www.smokestackdesign.com/html/aero7stalled.zip

No idea, seems to be an internal failure.. I'd see if Coolermaster
will replace it.
 
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