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Fire!

post #1 of 19
Thread Starter 
I installed a Scythe Ace fan controller last night. I plugged in 4 case fans, ramped them up to full and within 10 minutes. Fire! All of the fan wires melted and fused together and actually singed my PSU sleeves. Lucky for me I smelled the burning plastic/rubber before it got through the sleeves to my PSU wires.

I saved everything except the fan controller lines.

What could have possibly caused this? The controller itself was powered through my PSU.

post #2 of 19
First of all, and I think I speak for most of us here, pics!

How did you have the fans hooked up? Sounds like you put too much juice through the wires, but I don't know how you could have done that if all the fans were on separate channels.

Do you have any way of checking the voltage out of each header? I can't see how it could be over volting them, but worth a quick check.
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post #3 of 19
were you using fan extension cables for them? Its possible that one of the pins was loose and sparked causing a mini fire. It happened to me but thank god just the extension cable was permanently damaged (P.S. I was using scythe fans as well)
 
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post #4 of 19
Sounds like there could have been a short somewhere, causing there to be more current delivered along the wires then they are rated for. The wires heating up above their rated temperatures due to the increase in current would cause the sleeving to catch on fire.
post #5 of 19
Sounds like there could have been a short somewhere, causing there to be more current delivered along the wires then they are rated for. The wires heating up above their rated temperatures due to the increase in current would cause the sleeving to catch on fire.

Note, these 18 AWG wires are rated to handle a lot more then 12Volts, but they are limited to about 9Amps per wire (the connector limits this, surprised it didn't go up in smoke too)
post #6 of 19
Quote:
Originally Posted by Arinoth View Post
Sounds like there could have been a short somewhere, causing there to be more current delivered along the wires then they are rated for. The wires heating up above their rated temperatures due to the increase in current would cause the sleeving to catch on fire.

Note, these 18 AWG wires are rated to handle a lot more then 12Volts, but they are limited to about 9Amps per wire (the connector limits this, surprised it didn't go up in smoke too)
double post much? lol.

im thinking you had a lose connection somewhere causing a spark.
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post #7 of 19
Thread Starter 
The sleeves were on the PSU lines. They caught fire from the fan wires (unsleeved) that were on fire.

I don't have any pics because I freaked and immediately started pulling stuff apart. There was plastic/rubber ash on everything. My wife was pissed so I was trying to clean it up quickly. That stuff sure is sticky.

The Scythe channels and the wires supplied are 3 pin only, so I didn't do anything crazy. I used 3 pin fans (2 enermax, 1 notcua, 1 corsair) and plugged them right into the fan header lines supplied.

I did turn them all up to 100% but... isn't that what it's meant to do!
post #8 of 19
Sounds to me like you were pulling more current across the wires then they were designed for. Check the amp rating for each of the fans at 100%, and then add those numbers together. Find out what the amp rating for the wires you were using is, and I'll think you'll find that the first number was higher than the second number. A bad connection would burn the connection if there was any conductive foreign matter at the contact. A loose connection would simply not provide enough power to the fans, and they wouldn't work (or intermentantly go off and on). The entire wire got hot enough to burn. That means the resistance tolerance for the copper in that wire was exceded. Were you using extensions? Mind whipping up a quick diagram of how everything was connected along the damaged wire?

Edit: If you provide us with a diagram and part numbers for everything on that line, I could probably help you with figuring out what went wrong (unless it was a manufacturing flaw).
post #9 of 19
The Scythe Ace fan controller is rated for 12W per channel. If you plugged in 3 fans per channel; chances are you simply overloaded the controller. There is no way to be sure without know the exact fans that you were using, but for future reference... Always make sure that the controller can handle the load you're putting on it before you do something like this again.

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post #10 of 19
Thread Starter 
Hmm. Each fan 3pin was connected to the supplied 3pin connectors with the Ace and then plugged into the Controller spot. Nothing extra added.

To power the Fan Controller I connected it to a 6 pin PSU cable. I just realized... it wasn't the one supplied with my Corsair PSU. It just looks the same, but doesn't have the text on it. I just used a 6pin with a split fan connector on it. I don't think that thing was meant to transfer that kind of power.

Oops. They look the EXACT same except for the text.
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