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XD3 Pump - Slow or No Startup


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Hello, looks like I might be having an issue with my XD3 pump either being slow to start, or not starting at all upon resuming from an off power state. Has anyone else been having any issues?

 

I came home one day to find a warning from HWINFO that said my cpu temp was at 85 degrees and I was a bit confused. When I opened up the program and looked at my temps I noticed my GPU was also hot and then when I looked at my water pump rpm's it was at zero. So I shut down the system opened up the covers and sure enough the system was hot! I pulled the spare power supply from my cabinet and plugged the XD3 pump into it to test and see if it died and it fired right up. I let the pump run for a bit and let the system cool down. I then hooked up the pump back to the power supply in the system (EVGA 850 p2) and fired the system up and well, everything is working. I setup HWINFO to monitor the pumps rpm as the tach lead is plugged into my cpu fan header (it's set at a 40% constant speed in the bios) so that in the case it's at zero for so many read cycles to give me an alert and if's it's unattended for so long with reading zero rpms I have HWINFO shut my system down so I don't have another run away hot system. I've contacted EVGA thinking it could be a power issue and they suggested to plug the molex harness into an empty SATA connector on the power supply and see if the issues goes away. Well this morning when I woke my system up, I noticed the the pump rpms were sitting at zero when my desktop loaded (I have rain meter setup with a skin to monitor system information). After about a minute I then noticed the rpm's start to come up before my panic started to set in that it was not working again. I'm now wondering if it's the pump and not the power supply. My next step is to wire in a 12v led to the pump's power harness so I can make sure that the power supply is in factg supplying voltage to the pump to rule out if either the power supply is causing the issue, or if the pump is just not starting up all the time.

 

Are other people having or seeing any issues with these pumps?

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This is the first issue of this type I have seen. Most people with troubles have lost PWM control or have obvious motor issues. This appears to be something else.

 

Make sure the control header is set to PWM mode in the bios or “4 pin” in the Commander Pro settings. Most cpu fan headers are automatically PWM but an auto-detect feature could misidentify the DDC motor signal. It’s possible it sends the full 12v needed for start up on normal power on, but fails to do so on wake. As a PWM motor it needs 12v all the time.

 

You need to be careful if using a molex to SATA adapter. 12v is usually less of an issue than 3.3 or 5v, but sometimes there is a problem on the rails. If the lighting is off too, that would be an additional indicator this is a problem. However, if this problem only occurs when waking from sleep vs normal power on or reboot, I think we are looking at PSU cause and this would seem to be the area.

 

I would contact Corsair Support now and if it gets resolved — great. But better to get things in motion if the issue is more serious.

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I woke my system up this morning and when I arrived at the desktop my monitoring display showed me a zero rpm for about maybe 30 seconds or so. Be reminded on me having to wake the system, wait for the login screen, enter my password and wait the desktop to load. The monitoring software was functioning because I was watching all the other things such as temps and my other fan plugged into the aux port on the mobo was being updated but the pump rpms was sitting at zero. The pump did spin up before it triggered to shut the system down for no pump speed, and I could watch it on the monitoring software, it was late to the startup party.

 

I checked my bios settings (MSI Z270I Pro Carbon mobo) and it is set to pwm, locked at 45% and the system reports back 2400 rpm speed, they stay consistent. I did however change the step up/down time to .1 from .7, maybe that will help?

 

EVGA had me plug their molex harness from the "perf" port to the "sata" port stating that the harness would work with out any changes because the sata and perf ports are wired internally the same inside the power supply, so by swapping their molex harness to the other port no damage would occur and still receive the 12v needed. I guess that is their easy way to test and see if it's the port or not.

 

I don't have the leds on the pump even plugged in, so they are not in use at all.

Edited by ifly2high
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I got parts in today and made a 12v molex to led adapter that I have plugged into the next connecter after the pump, and ran the led to the front of the case so I can see it's glow near my radiator. Now we wait and see, if I see a green light and no pump rpm running then it's the pump or if not, the power supply is not suppling voltage. Crossing fingers this issue just goes away....
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Looks like it's the pump that is slow to startup. Everytime the system wakes up the power led I hooked into the harness turns instantly on, so it's not a late power delivery issues it seems. Only other thing I can think of would be the motherboard not sending a pwm signal to the pump right away, and I can swap the pumps pwm plug over to the motherboard aux port and see if the pump starts right away or see if it acts the same. It has started regardless (knock on wood) but sometimes right away like this morning, and others I'm sitting there wondering if it will start but does eventually come on.
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if the pump doesn't receive a PWM signal, it will default to full speed. and if it receives a ridiculously low signal like 1 or 2%, it also defaults to its minimum which is like 30%.

if power is good, the only thing i see faulty would be the pump controller itself > RMA.

That's why i hope you took C's advice to create a ticket already. If it's indeed the pump and it dies you'll be without computer until you get the replacement shipped :/

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  • 4 weeks later...
Well after many weeks with no issues, today, just now actually, the pump failed to startup, and my monitoring software shut down my system for me. Upon powering the system back up, the pump is functioning again. The led I have tied into the 12volt plug it's connected into was lite, so power delivery was there. The only other thing I can do is to swap the pwm connection to the aux connector and the fan I have in it to the cpu connector on the motherboard and see if the pump behaves the same way. I can swap the monitoring software to look at that port and let it behave the same way so my system would still shut itself down in the case of a prolonged zero rpm reading.
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  • 2 weeks later...

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