XD5 Pump will not work - Next steps?

[vidkid]

I am on the home stretch to finalize my first full custom loop. The XD5 pump worked for ~4 hours, then stopped for no obvious reason.

 

 

I have:

-all Corsair products bought new direct from Corsair website

-read many articles, and watched many videos to familiarize myself

-read ahead and closely followed directions in Corsair manuals

-successfully filled the loop (I rocked the case to get air pockets out)

-4 hours of leak testing completed (all good so far)

 

Where I am at:

-CPU overheats in ~1 minute (original H115 now installed)

-XD5 pump no longer works after 4 hours

-used second PSU to power XD5, still nothing

-used 3 different Molex cables, and Molex->SATA power adapter

-updated iCue, used the Hydro-X setup guide, still no action

-updated everything in MS Store, drivers, and Windows

 

Added details:

-using two powered Commander Pro units -> same internal USB hub -> mobo (zero issues with either unit in this setup, second unit only 1 month old)

 

 

I am starting to think this brand new pump will need to be RMA'd. Am I missing any important step?

Edited May 29, 2021 by vidkid
adding a picture

[Aalb75]

How does the pump behave if you disconnects the USB cable? Normal function is 100% bump speed.

Is the USB cable connected to one of the Commander Pro´s or to the USB hub?

[LeDoyen]

the pump doesn't have any USB cable ..

MOLEX, PWM control, and RGB.

if you unplug the PWM cable, it should default to full speed.

You could try plugging the PWM cable to a motherboard fan header and try to change its speed there, just to test.

Alternatively you could create a custom fan curve on iCUE instead of using the hydroX setup, and see if the pump responds to different speeds.

 

The pump is normally unable to spin at less than 800rpm. if it reads 0 and the pump is powered, then yep, it's definitely faulty.

If when you disconnect the PWM cable it doesn't go to full speed, it's faulty too.

[DevBiker]

If the XD5 is connected to a PWM header (even if it is unpowered), it'll default to 60%.

If it is not connected to any PWM header, it'll go to 100%.

 

There is a minimum as well but I'm not sure what it is.

[vidkid]

the pump doesn't have any USB cable ..

MOLEX, PWM control, and RGB.

if you unplug the PWM cable, it should default to full speed.

You could try plugging the PWM cable to a motherboard fan header and try to change its speed there, just to test.

Alternatively you could create a custom fan curve on iCUE instead of using the hydroX setup, and see if the pump responds to different speeds.

 

The pump is normally unable to spin at less than 800rpm. if it reads 0 and the pump is powered, then yep, it's definitely faulty.

If when you disconnect the PWM cable it doesn't go to full speed, it's faulty too.

 

 

I have tried fan curves, fixed RPM, fixed %... no luck

 

You understand my situation perfectly. Nothing happens when I unplug the PWM, dead silent. When the PMW is plugged into the motherboard, nothing as well. It all points to a faulty pump... I'm sure Corsair will warranty it. I will be happy when I'm finally done this project!

[vidkid]

If the XD5 is connected to a PWM header (even if it is unpowered), it'll default to 60%.

If it is not connected to any PWM header, it'll go to 100%.

 

There is a minimum as well but I'm not sure what it is.

 

The pump is dead silent when I try those things. It must be a faulty pump. Now I get to figure out how to drain this loop.... I was almost there!

Edited May 30, 2021 by vidkid
Change response

[vidkid]

UPDATE:

 

-started service ticket with Corsair Customer Service

 

-XD5 worked for ~3 hours, then stopped working minutes ago (I changed nothing from yesterday, I just turned my PC on)

 

-my PSU is the HX850i, purchased new locally (it has worked flawlessly thus far)

Edited May 30, 2021 by vidkid
spacing

[Graymin]

Pump should be connected to Fan 6 port but they are right if you disconnect it from the command pro it should go to 100% speed, with the Molex connected Edited June 25, 2021 by Graymin

[LeDoyen]

Port 6 is mandatory only if you want to use the HydroX profiles, which are total garbage for custom loop. Any PWM header will do if you use your own PWM curves.

[rifer]

This is a sorry situation…how is one supposed to install iCue w/o first installing WIN, and how is one to install windows when the cpu shuts down due to heat before windows can complete install? IF there is answer, why is it not in the manual?!!?

[DevBiker]

1 hour ago, rifer said:

This is a sorry situation…how is one supposed to install iCue w/o first installing WIN, and how is one to install windows when the cpu shuts down due to heat before windows can complete install? IF there is answer, why is it not in the manual?!!?

The pump has a minimum flow rate. If it's not connected to a PWM header at all, it'll go 100%. If it is, but there's no signal, it's 60%. There's also a minimum pump speed.
I had no problems - at all - with heat installing Windows and then iCUE before I could tweak my curves. None. Zero. Zilcho. Nada. And that's on a ThreadRipper.