DDC problem

Bigfoot · 03-02-2005, 02:44 PM

Hello everyone I am looking for some help as I'm having problems with my DDC pump.

It is not modified and at first I used Koolance coolant when I notice it would sometimes not start. It seems to be ok when running just fails to start up.
I switched to regular tap water in order to see if it would present a fix and it did not. It is not making any funny noise and works fine once started.

I purchased this pump because a friend recommend it to me and now his is doing the same thing. We do not have the signal lines hooked up will that make a difference?

If this is the wrong spot to ask for help I will move the topic.

BillA · 03-02-2005, 03:12 PM

contact your vendor, RMA the pump(s)

Bigfoot · 03-02-2005, 06:04 PM

Yes but what did I or we do to cause this problem?
Kevin tells me he read somewhere in this forum the pumps are good for 5 years.
Been more like 5 weeks for him and a few weeks for me.

What did we do wrong?

Makes no sense to make the same mistake twice

Senater_Cache · 03-02-2005, 07:38 PM

well, the one thing you ddi that was not very smart, was to run tap-water in your loop.
Not that that was the cause of th epumps problem, but its not a good idea....follow printed instructions?

Marci · 03-03-2005, 07:06 AM

Ensure you have enough ampage and wattage spar on the 12v rail of your PSU for the pump to start. If PSU is too weak, pump may not be able to start.

Bigfoot · 03-03-2005, 07:59 AM

I only used tap water as a fix test.

I will test the voltage on the power supply.

My friend Kevin has recieved email for our RMA and the vendor does not offer any suggestions and our problem is not news to him.

We will try agian if the power supply is OK

Thanks for the help

allnighter · 03-03-2005, 12:52 PM

It's somewhat strange that both of you have exactly the same problem but than again, if purchased at the same time they may come from the same batch and have same kind of defect, if defective. Voltage is the usual culprit in cases like this but if it turns out not to be the case, simply get your pumps replaced. These are quality pumps but even the best have some that are simply broken. Good luck troubleshooting.

Tempus · 03-03-2005, 12:58 PM

What PSU are you using?

Remote Man · 03-04-2005, 03:14 AM

I Have a similar problem that fixes with a PSU change, but I would be interested to know some batch/serial numbers.

lolito_fr · 03-04-2005, 06:27 AM

http://www.cooling-masters.com/forum...ic=1446&st=650

Bigfoot · 03-04-2005, 09:35 AM

The PSU seems fine at 12.8 V on my system

I can not read french but can tell alot of people are having this problem from the above link.

Looks like this "unregistered" guy that has been telling everyone that these units are bulletproof has some explaining to do.

Going to plug my Koolance pump back in for now
Again thanks for all the help everyone.

BillA · 03-04-2005, 10:16 AM

if you translate that page things are even less clear
http://translate.google.com/translat...language_tools
explaining for sure, I have no problem with candor
but before I speak I like to have a grip on what is happening, this is still unfolding
that letter from Ralf/Laing is verbatim what I have been saying, but more should be known shortly

when something can be said, with confidence, it will be

allnighter · 03-04-2005, 12:43 PM

Kepp us up to date Bill. I have no problems with my pumps but sure am curious about all this.

tinker77 · 03-04-2005, 02:23 PM

Interesting! I think I'll hold off buying and DDC(mpc350) for now.... :shrug:

lolito_fr · 03-04-2005, 02:52 PM

According to Ralph (see link above, doesn't need translating, lol) only the first 200 pumps had a problem.
I'm sure Laing have it all sorted by now don't you think!?

BillA · 03-04-2005, 02:55 PM

see post #2 and post #12
listen to whom you wish (use the past as a predictor ?)

Remote Man · 03-04-2005, 08:17 PM

I still don't see any batch/serial numbers.
As I would like to know if it's my pump or power supply that has a problem.

JWFokker · 03-04-2005, 08:48 PM

Maybe his PSU doesn't have sufficient amperage on the 12V line for consistent startup? Just because the line is at 12.8V when it's up and running doesn't mean anything. Everything requires more juice to get going than it does to keep going. I would try swapping PSUs if at all possible first. Not all PSUs are created equal, despite being rated for the same wattage.

Jam · 03-05-2005, 04:52 PM

I'm going to watch this thread as well.

I bought three of these pumps recently {from three different sources} and only now just fired up the first two in a rig I am building. The third will sit in a box for a couple of months.

All three pumps have been modified for 1/2" ID inlet - and I added the RPM sensor wire, so if any of the three fail, I don't expect an RMA. Still, we "modders" need to be prepared to replace the pump with a good one, if they do fail.

I had communications with Laing a couple weeks ago {Michael Solso, Greg leaverton} and I was told the pumps have been coming into the country {from Hungary, where they are made} for about a year - and that Laing has a six-figure USD inventory.} Sounds like, if there is a problem, they'll get it sorted.

While I did not measure the startup current, I highly doubt that any standard computer switching supply will fail to deliver enough current to start and run these little pumps.

Cheers,

Joe

surge · 03-05-2005, 06:03 PM

Quote:

Originally Posted by Jam

I'm going to watch this thread as well.

I bought three of these pumps recently {from three different sources} and only now just fired up the first two in a rig I am building. The third will sit in a box for a couple of months.

All three pumps have been modified for 1/2" ID inlet - and I added the RPM sensor wire, so if any of the three fail, I don't expect an RMA. Still, we "modders" need to be prepared to replace the pump with a good one, if they do fail.

I had communications with Laing a couple weeks ago {Michael Solso, Greg leaverton} and I was told the pumps have been coming into the country {from Hungary, where they are made} for about a year - and that Laing has a six-figure USD inventory.} Sounds like, if there is a problem, they'll get it sorted.

While I did not measure the startup current, I highly doubt that any standard computer switching supply will fail to deliver enough current to start and run these little pumps.

Cheers,

Joe

I got mine to start of a pair of 6 volt batteries in series when I was testing it, even though the voltage drooped to 10 volts

JWFokker · 03-05-2005, 11:22 PM

Quote:

Originally Posted by Jam

While I did not measure the startup current, I highly doubt that any standard computer switching supply will fail to deliver enough current to start and run these little pumps.

Cheers,

Joe

But he's not just starting the pump. He's starting everything else in his system at the same time. It's entirely possible his PSU just doesn't have enough juice. Not likely, but possible.

surge · 03-06-2005, 06:33 AM

Quote:

Originally Posted by JWFokker

But he's not just starting the pump. He's starting everything else in his system at the same time. It's entirely possible his PSU just doesn't have enough juice. Not likely, but possible.

Just measured the start-up current. Its 1.5 amps. I'd of thought any PSU would do that!

nightic · 03-06-2005, 08:20 AM

Quote:

Originally Posted by Bigfoot

The PSU seems fine at 12.8 V on my system

Could be the problem right there.
Have found anything above 13.2-13.3V (measured) and the pump won't start (although if the voltage is increased while the pump is already running then it's fine).
Your 12.8V (assuming you're reading that from BIOS/software) could easily translate to over 13.3V measured (or you could have a pump whose tolerance for start-up voltage is tighter than mine).

JWFokker · 03-06-2005, 10:53 PM

Quote:

Originally Posted by surge

Just measured the start-up current. Its 1.5 amps. I'd of thought any PSU would do that!

Well then. I stand corrected. Who knew it used so little power? Obviously not me.

eander315 · 03-08-2005, 01:32 PM

Any update on this issue yet? There have been at least a couple of people here and over at SPCR who have had problems with non-starting Laing DDC pumps. Still a relatively low failure rate, I'd say, given the number of people who have pumps that work fine, but any info would still be appreciated.

03-03-2005, 07:06 AM	#5
Marci Cooling Savant Join Date: May 2003 Location: Wakefield, West Yorkshire, UK Posts: 486	Ensure you have enough ampage and wattage spar on the 12v rail of your PSU for the pump to start. If PSU is too weak, pump may not be able to start. __________________ www.minimotosidecars.org / www.thermochill.com / www.themusiccollective.co.uk

03-03-2005, 12:58 PM	#8
Tempus Cooling Savant Join Date: Jul 2003 Location: Michigan, USA Posts: 456	What PSU are you using? __________________ Thou art God.

03-02-2005, 02:44 PM	#1
Bigfoot Cooling Neophyte Join Date: Mar 2005 Location: USA Posts: 5	DDC problem Hello everyone I am looking for some help as I'm having problems with my DDC pump. It is not modified and at first I used Koolance coolant when I notice it would sometimes not start. It seems to be ok when running just fails to start up. I switched to regular tap water in order to see if it would present a fix and it did not. It is not making any funny noise and works fine once started. I purchased this pump because a friend recommend it to me and now his is doing the same thing. We do not have the signal lines hooked up will that make a difference? If this is the wrong spot to ask for help I will move the topic.

03-02-2005, 03:12 PM	#2
BillA CoolingWorks Tech Guy Formerly "Unregistered" Join Date: Dec 2000 Location: Posts: 2,371.493,106 Posts: 4,440	contact your vendor, RMA the pump(s)

03-02-2005, 06:04 PM	#3
Bigfoot Cooling Neophyte Join Date: Mar 2005 Location: USA Posts: 5	Yes but what did I or we do to cause this problem? Kevin tells me he read somewhere in this forum the pumps are good for 5 years. Been more like 5 weeks for him and a few weeks for me. What did we do wrong? Makes no sense to make the same mistake twice

03-02-2005, 07:38 PM	#4
Senater_Cache Cooling Savant Join Date: Jul 2004 Location: F L Posts: 125	well, the one thing you ddi that was not very smart, was to run tap-water in your loop. Not that that was the cause of th epumps problem, but its not a good idea....follow printed instructions?

03-03-2005, 07:59 AM	#6
Bigfoot Cooling Neophyte Join Date: Mar 2005 Location: USA Posts: 5	I only used tap water as a fix test. I will test the voltage on the power supply. My friend Kevin has recieved email for our RMA and the vendor does not offer any suggestions and our problem is not news to him. We will try agian if the power supply is OK Thanks for the help

03-03-2005, 12:52 PM	#7
allnighter Cooling Neophyte Join Date: Sep 2004 Location: somewhere in the middle Posts: 61	It's somewhat strange that both of you have exactly the same problem but than again, if purchased at the same time they may come from the same batch and have same kind of defect, if defective. Voltage is the usual culprit in cases like this but if it turns out not to be the case, simply get your pumps replaced. These are quality pumps but even the best have some that are simply broken. Good luck troubleshooting.

03-04-2005, 03:14 AM	#9
Remote Man Cooling Neophyte Join Date: Sep 2004 Location: Austraila Posts: 8	I Have a similar problem that fixes with a PSU change, but I would be interested to know some batch/serial numbers.

03-04-2005, 06:27 AM	#10
lolito_fr Cooling Savant Join Date: Dec 2003 Location: France Posts: 291	http://www.cooling-masters.com/forum...ic=1446&st=650

03-04-2005, 09:35 AM	#11
Bigfoot Cooling Neophyte Join Date: Mar 2005 Location: USA Posts: 5	The PSU seems fine at 12.8 V on my system I can not read french but can tell alot of people are having this problem from the above link. Looks like this "unregistered" guy that has been telling everyone that these units are bulletproof has some explaining to do. Going to plug my Koolance pump back in for now Again thanks for all the help everyone.

03-04-2005, 10:16 AM	#12
BillA CoolingWorks Tech Guy Formerly "Unregistered" Join Date: Dec 2000 Location: Posts: 2,371.493,106 Posts: 4,440	if you translate that page things are even less clear http://translate.google.com/translat...language_tools explaining for sure, I have no problem with candor but before I speak I like to have a grip on what is happening, this is still unfolding that letter from Ralf/Laing is verbatim what I have been saying, but more should be known shortly when something can be said, with confidence, it will be

03-04-2005, 12:43 PM	#13
allnighter Cooling Neophyte Join Date: Sep 2004 Location: somewhere in the middle Posts: 61	Kepp us up to date Bill. I have no problems with my pumps but sure am curious about all this.

03-04-2005, 02:23 PM	#14
tinker77 Cooling Neophyte Join Date: Jan 2005 Location: California Posts: 4	Interesting! I think I'll hold off buying and DDC(mpc350) for now.... :shrug:

03-04-2005, 02:52 PM	#15
lolito_fr Cooling Savant Join Date: Dec 2003 Location: France Posts: 291	According to Ralph (see link above, doesn't need translating, lol) only the first 200 pumps had a problem. I'm sure Laing have it all sorted by now don't you think!?

03-04-2005, 02:55 PM	#16
BillA CoolingWorks Tech Guy Formerly "Unregistered" Join Date: Dec 2000 Location: Posts: 2,371.493,106 Posts: 4,440	see post #2 and post #12 listen to whom you wish (use the past as a predictor ?)

03-04-2005, 08:17 PM	#17
Remote Man Cooling Neophyte Join Date: Sep 2004 Location: Austraila Posts: 8	I still don't see any batch/serial numbers. As I would like to know if it's my pump or power supply that has a problem.

03-04-2005, 08:48 PM	#18
JWFokker Cooling Savant Join Date: May 2004 Location: Kingston, NY Posts: 269	Maybe his PSU doesn't have sufficient amperage on the 12V line for consistent startup? Just because the line is at 12.8V when it's up and running doesn't mean anything. Everything requires more juice to get going than it does to keep going. I would try swapping PSUs if at all possible first. Not all PSUs are created equal, despite being rated for the same wattage.

03-05-2005, 04:52 PM	#19
Jam Cooling Neophyte Join Date: Feb 2005 Location: Staten Island, New York Posts: 16	I'm going to watch this thread as well. I bought three of these pumps recently {from three different sources} and only now just fired up the first two in a rig I am building. The third will sit in a box for a couple of months. All three pumps have been modified for 1/2" ID inlet - and I added the RPM sensor wire, so if any of the three fail, I don't expect an RMA. Still, we "modders" need to be prepared to replace the pump with a good one, if they do fail. I had communications with Laing a couple weeks ago {Michael Solso, Greg leaverton} and I was told the pumps have been coming into the country {from Hungary, where they are made} for about a year - and that Laing has a six-figure USD inventory.} Sounds like, if there is a problem, they'll get it sorted. While I did not measure the startup current, I highly doubt that any standard computer switching supply will fail to deliver enough current to start and run these little pumps. Cheers, Joe

03-08-2005, 01:32 PM	#25
eander315 Cooling Neophyte Join Date: Jan 2005 Location: Houston Posts: 34	Any update on this issue yet? There have been at least a couple of people here and over at SPCR who have had problems with non-starting Laing DDC pumps. Still a relatively low failure rate, I'd say, given the number of people who have pumps that work fine, but any info would still be appreciated.

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