Originally Posted by vvv850
You have a way of not reading what was already written. Don't know if it's lack of respect for other posters or just ignorance. Anyway, you are really starting to get on my nerves by insinuating foul play on my side. I told you that I understand your opinion regarding hot swapping fans, but professional experience and practical experience are on my side. Not gonna continue on this subject further.
Back on topic.
First and foremost, I've told you that I MEASURED the current draw of six Vardars ER on SPINUP. Measuring for me means breaking out the calibrated Fluke and logging the readings. What I found was the 6 Vardars pull 3.1-3.5A for around 1 second.
Second, your math is based on max power draw while they are already spinning. A motor tends to multiply the nominal current while starting up.
Lastly, as the title of this topic says, I am talking about startup problems of the fans.
What really gets me about your post is that you seem confident about what you are saying without even reading what others have said. To give you an example:
The D5 G2, at least, has a nominal power draw of 23W. Please observe the term NOMINAL. While a pump starts up it can draw 2-7x the nominal current. AAAnnnnnnddddd, I told you that my pump is not drawing power from the AQ only PWM signal. Pumps now don't even come with fan connectors for power.
Oh, not to forget, I have an AQ6 Pro.
I apologize if you feel like I am calling you out for anything. It's not my nature to start needless arguments with anybody. My only concern was helping you, not in tearing you down or mocking you. I will simply chalk up our differences in communication to our languages (as English is my native language and likely not yours) and regional differences.
I never said that you were taking the p!zz out of AC. In fact I said the opposite. Like the tech is taking the p!zz out of you.
Now, as to the technical concerns. Here in the US, electrical product cannot be sold in this country if the peak numbers do not bear out. Meaning EK cannot
put .18A on a fan that increases to .28A at any time over the cycle of that product. Just can't. That's misrepresentation and fraud. I went to EK's site and they have two versions of the ER Amperages, 2200rpm and slower all specifically state that they are .18A power draw and the max wattage of 2.16w(I did this last night and am working without notes today) iirc. 3000rpm fans shows 5.4w of continuous duty and I didn't pay attention to Amps for that as it gives me an idea of where EK may have fudged. That isn't saying you're wrong, but is showing where you MAY be mistaken. I do believe you FLUKED your fans and I do believe your Watts were increased over their stated peak numbers. I simply chalk that up to poor QC at the factory.
It means one of two things occurred @ their end and first thing and unlikely(in my mind anyway) is that the label on the back of the hub is not the correct one. That certainly is a possibility. The guy at the bench doing the testing and labeling procedure could have started his day with a brain splitting hangover and simply could've reached for the correct label, missed and grabbed the wrong one by mistake. Mistakes happen.
The pcb of the fan(s) that you own are of the 5.4w variety but the rest of the internals are of the 2.16w variety. This would downclock the Voltage to be roughly what you say you got for peak. And this I believe is more than spot on versus the label mixup possibility.
So yes I guess there are issues with your ERs'. But NO, I do not believe that EK is the only goblin here. AC products should by default come with an overvoltage alarm of some sort. A blinking light or a piezo alarm that would notify the user of the issue. They charge a bloody mint for their products. ~$300 for their LED CPU blocks and ~$150-$200 for their LED display controllers. And the controllers are bare minimum products that hit you in your wallet for adding the bells and whistles to a unit thats retail is $150-$200. A lot of people may blow me off on this since I don't own an Aquaro, but that's their right. They can say whatever they want.
I apologize for simply not going back to the post where you said what model. My bad. But I will continue to rely on asking questions to get to the facts.
Fact one. No way EK ER fans should peak oout ABOVE their rated power consumption. That simply should never happen. If it does then the end user needs to contact their tech support and notify them immediately and take the issue from there. Especially an End User such as yourself that apparently has had the ability to test the product from the very beginning. My apologies for ruffled feathers, but a little of this issue is on you. Had you checked for accuracy at the beginning of the issue, your AQ6Pro may not have started tapping out. And as you said in your last response to me you DO have a FLUKE tester and you do this for a living maybe? So if you feel like a venomous response needs to head my direction, how about taking a deep breath and think about this from my side of things. I don't know ANYTHING about you. What I believe I have proven is that the math doesn't bear out for the fans or for you. I am not trying to flog you while you're down. I am simply trying to understand what the ENTIRE issue is and not simply little bits and pieces of the issue.
I think those ER fans you have, have the incorrect pcbs in them and the windings are correct. Which would explain a surge at boot. This issue will now have me checking all of my(9) ERs' for accuracy using my voltage meter to make absolutely certain I will not be overloading my fan hubs. I have two DeepCool 4 socket PWM hubs and an XSPC PWM fan hub that those will connect to.
Again, my apologies for the frustrations. Never intended to frustrate you and hope we can move forward instead of continuing this in a heated experience. I can read just fine btw.
You sir can continue to hot swap you fans. For me? I was taught not to take chances where electricity is involved. My maternal Grandfather was a Master Electrician and he raised me to always be cautious with electrical components. His motto was "Just cause it doesn't happen now, doesn't mean that it won't ever happen". I take that very seriously. Even with fans.
So AC does
have an OCv device per channel...
Originally Posted by vvv850
Just a quick correction. Aquaero will power off the header (0 V) in case it detects an overcurrent trip.
So then, WHY did it fail. It stepped down instead. That should NOT have occurred. Going from 10 to 8 to 6 fans instead? So again maybe the AQ6Pro was defective to begin with? That OCv trip should have given you a big fat 0 the moment those fans spooled up. It didn't.