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PSU Fan Replacement (enermax pro82+ 525w)

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post #1 of 15 (permalink) Old 02-21-2019, 07:54 PM - Thread Starter
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PSU Fan Replacement (enermax pro82+ 525w)

I want to change PSU Fan (enermax pro82+ 525w).

Enermax fan has 4 cables (red, white, black, yellow) connected to the PSU PCB via JST PH 4-pin connector. So i bought a be quiet PURE WINGS 2 PWM. I cut off the PWM connector and crimped my JST Terminals carefully. So bad connection cannot be the problem.

Next i watched the arrangement of the original fan. PURE WINGS cables are all black unfortunately, but you can watch inside, at the Fan PCB an see the soldering joints attached to the cables. They say "-" "+" "F" and "P".

Therefore i connected the PURE WINGS cables to a new JST PH 4-pin connector:

"-" to black
"+" to red
"F" to white
"P" to yellow

I connected the new one but it didn’t work. So i swapped white and yellow, and again no luck.
Other swaps of cabled does not make sense imo, because it would be ridiculous if enermax would not use black and red as ground and phase.#

Am i missing something?
Please help me
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post #2 of 15 (permalink) Old 02-21-2019, 08:28 PM
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I have no idea as to your question, but must tell you that (in case you are unaware) you would be wise to be very careful. I've gotten zapped trying to replace a PSU fan, even after trying to discharge it beforehand. AFAIK one could even die of electrocution working with a PSU.

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post #3 of 15 (permalink) Old 02-21-2019, 09:03 PM - Thread Starter
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i unplug it of course
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post #4 of 15 (permalink) Old 02-21-2019, 09:44 PM - Thread Starter
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you are right, better double check if plugged or not
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post #5 of 15 (permalink) Old 02-21-2019, 10:07 PM
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Quote: Originally Posted by embuh456 View Post
i unplug it of course
Seriously?
The caps hold charge (possibly for years) after you unplug a PSU, some of those caps are pretty potent to a human.


FYI not all fans will work with any PSU, if the fan's ohm load is off too far there's good chance it will either not work or work differently than intended. Perhaps the PSU's fan has a lower starting voltage than the replacement? Or that plus the fan having a higher ohm load making the situation worse.
Does the PSU fan run all the time or does it turn off?


EDIT: Just looked up the PSU and apparently it was a very quiet unit so it wouldn't surprise me if the PSU simply doesn't meet the minimum voltage requirement for that fan.

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Last edited by white owl; 02-21-2019 at 10:13 PM.
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post #6 of 15 (permalink) Old 02-21-2019, 10:19 PM
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As white owl stated, the capacitors etc hold a charge long after it's unplugged. I had tried to discharge the PSU for a minute (by shorting the 24pin connector, as if to power it on) before I worked on it, and still got zapped.

Maybe replacing the fan is still worth it for you, but I would have felt negligent not to warn you. Personally I'd sell it and buy a different PSU if not happy with the fan noise, not worth the risk to me. If I were to do it again, I'd short the pins at least overnight (probably more like a ****ing week) and see about protective gloves.

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Last edited by Almost Heathen; 02-21-2019 at 11:33 PM.
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post #7 of 15 (permalink) Old 02-22-2019, 12:54 AM
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Its an 11 year old PSU so dont bother replacing the fan throw it out and buy a new unit
Ripple suppression is not very good either so thats another excuse for throwing it out

As for the fan replacement if you dont know what you are doing and you are not careful enough you can win yourself a darwin award

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Last edited by shilka; 02-22-2019 at 12:59 AM.
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post #8 of 15 (permalink) Old 02-22-2019, 01:21 AM - Thread Starter
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the original fan is capable if 1500rpm like the new one. In my case the psu fan never goes to zero rpm. But it is regulated by power consumption i guess. Maybe it can be 0 rpm but my rigs drain is to high.
i don’t mind to buy a new as long it works. I will inform about to safely work with open psu.

I will ask enermax about my problem.

Thank you for your answers.

Darwin Award would be nice btw.
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post #9 of 15 (permalink) Old 02-22-2019, 01:25 AM
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Maybe the old fan is actually fine and the problem is instead something else about the PSU? Maybe the fan header in the PSU isn't working.
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post #10 of 15 (permalink) Old 02-22-2019, 01:40 AM - Thread Starter
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The original fan works pretty well. But it is actually the loudest part of my system while idling.
It does not work perfectly. There is some kind of excessive noise, the noise is not very loud but imo worth for a change.

If there is no way to change the fan, i will keep the psu until it dies. Because that is my way to use things. Let it work and repair it until there is no way to fix it or it is technically outdated.
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