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Trouble with one of two XSPC Photon D5 pump/res loops

post #1 of 2
Thread Starter 
Greetings OCN, long time listener first time caller. o/

I have a roughly 3 day old dual loop system that I've still been tinkering with, and I can't seem to resolve a bit of noise I'm getting from one of the D5 pumps.

The loop this pump is on contains also a CPU waterblock, chipset waterblock, a double 120mm radiator, and it's all connected with 1/2 by 3/4 so I'm doubting it's a restriction or blockage issue in the loop. (I'm not a novice to water, but there is still a libraries worth to learn!)

So far I have gutted the other loop from the system for ease of access. I have verified no blockage in the waterblocks (acrylic tops, no debris). No leaks present, and the large 270 res is full with about 1 1/2 inch left at the top. I've even given the rad/pump combo a gentle shake to try and free any air in the pump housing.

The noise I'm getting is what I'd describe as the impeller chopping the air in the liquid, and there are in fact a small amount of bubbles being pushed through the outlet. The noise/bubbles do not occur with the D5 on speed 1 or 2. 3 produces a minor sound, while 4 and 5 produces a noticeable air chopping sound with a fair amount of bubbles being ejected into the outlet tube. I'm feeling like I'm going to have to pull this loop and disassemble the res, but I feel wary of taking apart a D5 Photon. I've read that they are factory sealed and taking them apart voids warranty. (I believe that is right. Operating on little sleep this weekend. biggrin.gif )

TL;DR: Pump makes a noise that sounds like it is chopping air when on higher speeds. Can't seem to shake this mystery air out of the pump housing.

Video of problem. My mobile is a paper weight and doesn't record well. The sound in the video is very exaggerated compared to what I hear in person.
Any ideas before I disassemble this thing to check for impeller damage and/or RMA it?
post #2 of 2
I don't see why you would have to take the res apart. Drain the loop, take the pump out and make sure the impeller is not hitting or rubbing on anything. Reassemble, fill the loop, and try to to work out the air bubbles if they are still there.
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