Jump to content
Corsair Community

Issue with Aquacomputer D5 PWM Pump attached to Commander Mini


profanum429

Recommended Posts

I'm trying to use the Commander Mini to control my D5 PWM pump + some fans and I'm running into a little trouble and was wondering if anyone else has seen the issue I'm hitting.

 

I can set the PWM percentage to 100% for the D5 pump but it will only run at ~3800 RPM (it's max is 4800 RPM) and it definitely is not running full speed since if I pull the connector from the Mini the pump ramps up noticeably in speed. I see this behavior with both Corsair Link and SIV so I don't think it's a software issue. I was wondering if anyone else is using the Mini to control a D5, and if so, do you get the full RPM range? Thanks!

Link to comment
Share on other sites

Looking at http://www.aquatuning.co.uk/water-cooling/pumps/d5-series/d5-pumps/19181/aquacomputer-d5-pumpenmechanik-mit-pwm-eingang-und-tachosignal then the pump needs 23 watts which is right on the limit of the 2 amps that the CL Mini is specified to supply. The image of the pump has MAX 37 W on it which is over 3 amps :eek:! Given you also have some fans I am also wondering if you are also exceeding the 4 amp overall limit.

 

I would be inclined to power the pump directly from the PSU with only pins 3 + 4 being connected to the CL mini. I would also check the mode to make sure the CL Mini detected it as 4-pin PWM.

 

attachment.php?attachmentid=26114&stc=1&d=1470465836

1722629231_LinkFansmode.thumb.png.5688746baaefdb87483d7160d74d02a7.png

Link to comment
Share on other sites

Ahh, oops, I forgot to mention the pump is running off of a molex, the only pins going to the Commander Mini are 3 and 4 for the RPM signal and the PWM signal :) So it shouldn't be coming anywhere close to the power limit of the Mini, hopefully, haha.
Link to comment
Share on other sites

Just did this morning; it's showing mode 03. Here is a screenshot of it :)

 

The mode should be 83 and it being 03 means the CL Mini has failed to detect the pump. I have no idea what effect this will have on the firmware.

 

If you press [Link Fans] is the mode still 03? I plugged a 2-pin fan into a CL Mini and it also failed to detect it, so I suspect it's the RPM it uses to decide a fan is there.

Link to comment
Share on other sites

The mode should be 83 and it being 03 means the CL Mini has failed to detect the pump. I have no idea what effect this will have on the firmware.

 

If you press [Link Fans] is the mode still 03? I plugged a 2-pin fan into a CL Mini and it also failed to detect it, so I suspect it's the RPM it uses to decide a fan is there.

 

There it goes, when I press 'Link Fans' the mode changes to 83, but I don't get any more ability to go above about 3800 rpm at a PWM value of 255. I can definitely drop it down but I'm still missing the top 1000 RPM from the pump :(

pump_screen2.thumb.png.f73bda9c802c094cda5496ff095b676f.png

Link to comment
Share on other sites

There it goes, when I press 'Link Fans' the mode changes to 83, but I don't get any more ability to go above about 3800 rpm at a PWM value of 255. I can definitely drop it down but I'm still missing the top 1000 RPM from the pump :(

 

When you got the extra 1000 RPM was that using the same 12 volt supply of a different supply?

 

When connected to a different CL Mini port what happens?

 

The only other thing I can think to check is the PWM waveform, but I suspect you don't have an oscilloscope so can't. It's only 25 KHz, so I suspect http://www.ebay.com/itm/300992154516 would be fine.

 

BTW the screen shots are 3456 x 648 pixels which is silly and you should crop them.

Link to comment
Share on other sites

Woops, sorry about the image sizes, didn't notice Paint had a huge canvas when I was pasting! Fixed them now, they are a more reasonable size :)

 

Yep, same PSU. If I disconnect the PWM header from the CL Mini it'll automatically bump up to 100% duty cycle since no PWM signal is detected by the pump. I can hear the change and also see a noticeable difference in the reservoir where the water is returning.

 

I've tried all 6 of the ports on the CL Mini and see the same behavior on all of them :(

 

I can probably borrow an oscope from work but that'll have to wait until Monday rolls around unfortunately. Thanks for the troubleshooting help! :)

Link to comment
Share on other sites

I can probably borrow an oscope from work but that'll have to wait until Monday rolls around unfortunately.

 

That's handy :biggrin:, you may find http://www.formfactors.org/developer%5Cspecs%5C4_Wire_PWM_Spec.pdf useful.

 

It just occurred to me that you could connect the pump pin-4 to +5 volts and this should set 100% PWM. What is the pump speed when you do this?

Link to comment
Share on other sites

It would be worth checking the sample counts on cooling status to confirm that the pump is reporting it's RPM 100% of the time.

 

attachment.php?attachmentid=26124&stc=1&d=1470504619

 

Note the 1,999s are expected as those fans are multiplexed and the DIMM temperature reading is deferred.

1349855189_CoolingStatus.png.bceac525126260280a20c462c490274c.png

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...