DDC Pump Died?

Tech Kid With PC Pros · Dec 12, 2017

Ok. I just built my loop and I had it leak testing after removing all the bubbles by rocking the case back and forth gently to remove all the bubbles. It was working just fine but then the pump stopped and I can't seem to get it to start back. I never let it run dry, so I don't know what happened.

rubix_1011 · Dec 13, 2017

We will need more information, if possible.

How is the pump being powered? Was the pump working while the PC was powered up and running and then suddenly quit, or did it just not start at machine boot at some point?

Have you tried an alternate power source/connection for it?

Tech Kid With PC Pros · Dec 13, 2017

rubix_1011 :

I had it powered by molex and I had a single wire PWM connector on a controller so I could change the speed at will. It was running for about 30 minutes or so before it quit while the system was on. Could it be because of a lot of air bubbles or something? I heard it wasn't good to have alot of air go into your pump. Edit: It is an Alphacool DDC 310

rubix_1011 · Dec 13, 2017

Air bubbles? No.

Air without water? Yes, bad.

Have you tried it on another molex connection and without the PWM setup?

Tech Kid With PC Pros · Dec 13, 2017

rubix_1011 :

Yes I have.

rubix_1011 · Dec 13, 2017

Another question.

Have you checked inside the molex connector on the pump to make sure one of the pins hasn't pushed back and is not making contact? I've personally had this happen, which is why I ask.

Tech Kid With PC Pros · Dec 13, 2017

rubix_1011 :

Yes I have. I am very confused as to how this could happen. ALphacool is a very reliable brand and they are highly recommended by JayzTwoCents as with the Laing DDC and D5 pumps. I am thinking about RMAing it and getting a replacement from Performance PC's.

rubix_1011 · Dec 13, 2017

They are highly recommended by everyone. I personally own 2 DDC's and 1 D5 and none have been bad over the course of 15 years.

Tech Kid With PC Pros · Dec 14, 2017

rubix_1011 :

Update: I drained the entire loop and reinstalled the pump. After that, I tried to refill it. I feel the pump spin up in quick bursts, but it still does not push any water at all.

rubix_1011 · Dec 14, 2017

Is the loop closed and sealed when you do this, or is the reservoir top open?

Tech Kid With PC Pros · Dec 14, 2017

rubix_1011 :

The Res is open.

rubix_1011 · Dec 14, 2017

Can you post a pic of the loop setup? I'm curious if there is something wrong with flow or restriction.

Tech Kid With PC Pros · Dec 14, 2017

Yeah, give me a minute. My phone is dying.

Tech Kid With PC Pros · Dec 14, 2017

Tech Kid With PC Pros · Dec 14, 2017

rubix_1011 :

https://imgur.com/gallery/I03wn

Tech Kid With PC Pros · Dec 14, 2017

rubix_1011 :

see anything wrong?

rubix_1011 · Dec 15, 2017

What is your loop order?

Is that a cross flow radiator? Or does it just have ports on both sides? (Looks like there are ports on both sides?) What radiator is that?

Have you tried testing just the pump itself, disconnected from the rest of the loop?

Tech Kid With PC Pros · Dec 16, 2017

The Radiator is an XSPC Crossflow 2. My or gers goes from the res, to the rad, to the cpu block, then back to the pump and res.

1LiquidPC · Dec 16, 2017

The Molex pins all mated together properly as mentioned above? Have you tried rigging the pump to fill just the reservoir in a mini loop setup? This way the water only goes from the pump back to the res in a continuous cycle. I'm using 2 DDCs as well in my setup.

rubix_1011 · Dec 16, 2017

1LiquidPC :

This was the route I was also thinking...I feel we've tried the obvious things, but how about the simple?

Tech Kid With PC Pros · Dec 17, 2017

rubix_1011 :

https://drive.google.com/file/d/1LQxP9weKlJI5cQfwqcPoWhPtscnyAtri/view?usp=drivesdk

rubix_1011 · Dec 17, 2017

OK, watched the video. That helps a bit.

Does the pump work when the PC is connected properly with power and turned on? There are some power supplies that have circuitry that prevents shorting or jumping for periods of time and once tripped, you have to reset the PSU via the back switch. Some just don't like being jumped at all.

If you plug the 24 pin ATX back into the motherboard and start up the system, does the pump work normally, or does it continue to function as you have been stating? I'm assuming you've removed the PWM configuration and attempting to power just via Molex?

4Ryan6 · Dec 17, 2017

You could simply have gotten a bad pump, it does happen.

Before you see about getting an RMA for it pull the unit and drain it, remove the water cylinder and make sure the water intake on the top of the pump is not blocked or obstructed.

4Ryan6 · Dec 17, 2017

rubix_1011 :

I have literally lost count as to how many times that has happened!

rubix_1011 · Dec 17, 2017

So have I. Those Molex connectors are usually cheap and don't seat the pins well.

DDC Pump Died?

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