DDC-2 Dies

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02-13-2007, 07:10 PM
Hassan

I have one DDC 10w with my own modded top, and 2 18w with petras top, all ok, all with neoprene or gel underneath, but i rest mine on their sides... maybe that helps dispell some of that heat you guys are referring to...
02-13-2007, 07:19 PM
SiGfever

Quote:

Originally Posted by Hassan

I have one DDC 10w with my own modded top, and 2 18w with petras top, all ok, all with neoprene or gel underneath, but i rest mine on their sides... maybe that helps dispell some of that heat you guys are referring to...

This is how I had mine mounted and there is a 120mm Yate D12SL-12 blowing directly on the sinks.

http://img176.imageshack.us/img176/5...04largeir9.jpg
02-13-2007, 07:26 PM
Hassan

yeah, I've seen that pic a few times and always wondered it that helped :stick:
guess it didn't with the first... hopefully better luck with the second one :)
02-13-2007, 07:30 PM
SiGfever

Quote:

Originally Posted by Hassan

yeah, I've seen that pic a few times and always wondered it that helped :stick:
guess it didn't with the first... hopefully better luck with the second one :)

Well it wasn't running hot that's for darn sure.
02-14-2007, 01:17 AM
septim

well at least you have a new production batch pump. hopefully good long run.
02-14-2007, 02:10 AM
hopper

is there anyway to mod the pumps so we can monitor the motor speed like 3rd wire fan speed,, know what im sayn
02-14-2007, 02:14 AM
Pete

There is an rpm feed off it, the blue wire! I'm looking at water cooling the base of mine, i got 6/7 of them to do so i think it;s a must need to do job!
02-14-2007, 02:17 AM
hopper

i have a d5...
02-14-2007, 08:33 AM
voigts

Now that is the way to do customer service. More companies would be smart to treat people the same way as DD did you.
02-14-2007, 09:04 AM
_G_

Quote:

Originally Posted by SiGfever

Update:

When I got home tonight a package was waiting for me from Danger Den. I looked at it wondering if DD had sent my locking-up pump back because they couldn't duplicate the problem or did they step up to the plate and send me a new pump to replace mine?

Well as has been my experience dealing with DD they are a stand-up company and provide excellent customer support. I have dealt with Kathi on several occasions and she has always been very pleasant. So I opened the box and found a BRAND NEW 01/07 manufacture DDC-2TPMP sitting in the box!

My hat goes off to them for showing that they are willing to back their products and must have gone the extra distance to test my pump under a restriction to simulate real world conditions until it failed. :toast: :clap: :clap:

good to hear:toast: maybe they where folowing the thread lol
02-14-2007, 03:59 PM
SiGfever

Quote:

Originally Posted by septim

well at least you have a new production batch pump. hopefully good long run.

Thanks septim,

The labeling on the 01/07 production pump is very different then my previous model. It does not have as much information printed on the label.
02-14-2007, 05:35 PM
ShaneS

Quote:

Originally Posted by SiGfever

Thanks septim,

The labeling on the 01/07 production pump is very different then my previous model. It does not have as much information printed on the label.

How can you tell which production you have?
02-14-2007, 05:49 PM
Graystar

Quote:

Originally Posted by SiGfever

So I opened the box and found a BRAND NEW 01/07 manufacture DDC-2TPMP sitting in the box!

Take a picture of the impeller and post it.
02-14-2007, 05:51 PM
thunderstruck!

There will be those who have no problem with their DDC-2 and those whose have died. Honestly, there's no reason to throw away your pump. Some are just unlucky to have had theirs failed. There have been many D5s that have failed as well. I've had my DDC-2 running fine for over 8 months, with an aftermarket top. Does it mean there isn't a problem? Maybe not, but likewise, just because a few pumps have died (Maybe 1% or less), doesn't mean there is a problem. The fact is, the DDC-2 is the best DC powered pump to date. Imo, these failed pumps are just lemons, and doesn't mean all pumps will fail in a matter of days/months.
02-14-2007, 06:03 PM
SiGfever

Quote:

Originally Posted by Graystar

Take a picture of the impeller and post it.

http://img120.imageshack.us/img120/5...26largedb2.jpg

http://img175.imageshack.us/img175/4...27largedd2.jpg
02-14-2007, 07:33 PM
Graystar

Thanks!

Now, isn't that the impeller that everyone thought was the old style? Weren't the new pumps supposed to have an impeller with a smaller hole?

(Actually, it's my personal opinion that the small hole impeller was an old design...but I'm just speculating.)
02-14-2007, 07:52 PM
Shpoon

I put a PetraTech BabySink Large on the bottom of mine, seems to be working much better, it still gets warm, but not hot as in bubbling the gel...(The heatsink is tiny though).
02-19-2007, 02:54 PM
celerity

My DDC with Petra's top failed as well. I was filling my system with water and after perhaps 3 minutes the pump stops and I hear some strange noise. I could smell burned plastic, I believe some electronics may have failed. I did not run the pump dry. Also, when I checked it it still showed 12V although the resistance was too low (U=RI).

I sent my pump back to PTS and I hope I will recieve my new pump soon. Many thanks to Quoc and Alex :).

IM
02-19-2007, 02:59 PM
Petra

Quote:

Originally Posted by Graystar

Thanks!

Now, isn't that the impeller that everyone thought was the old style? Weren't the new pumps supposed to have an impeller with a smaller hole?

(Actually, it's my personal opinion that the small hole impeller was an old design...but I'm just speculating.)

As I mentioned previously, Laing's US branch is going to be doing a silent transition over to the new blue impellered pumps once they're out of the red/orange impellered DDC-2's (though there could be a period of mixed shipments).
02-19-2007, 03:05 PM
SiGfever

Quote:

Originally Posted by Petra

As I mentioned previously, Laing's US branch is going to be doing a silent transition over to the new blue impellered pumps once they're out of the red/orange impellered DDC-2's (though there could be a period of mixed shipments).

Alex,

Is the blue impeller an improved model and if yes how so?
02-19-2007, 03:11 PM
Graystar

Quote:

Originally Posted by Petra

As I mentioned previously, Laing's US branch is going to be doing a silent transition over to the new blue impellered pumps once they're out of the red/orange impellered DDC-2's (though there could be a period of mixed shipments).

Oh sorry...missed that somehow.

Now, a smaller impeller inlet would boost head but drop flow...does Laing have new specs for pumps with these impellers?
02-19-2007, 03:23 PM
Petra

Quote:

Originally Posted by SiGfever

Is the blue impeller an improved model?

As far as reliability goes, only time will tell (though, the ~5% failure rate that's been observed with the current ones have practically all been DOA/dead within 48 hours... so the long-term reliability seems to be good). There may be a small performance increase but, again, they haven't sent me one yet so I can't say for sure (working on that, though).

*edit* The only "official" specs that I've seen for the new pumps has been for experimental/prototype/modified versions but I'll ask for stock numbers.
02-19-2007, 03:25 PM
vinylkid

I had a DDC-2 (orange impeller) experience periodic start-up failure (jarring the pump would start it most of the time) around 90 days ago and I went out and bought a replacement DDC-2 so that my loop could run while I RMA'd the original pump. The replacement was the same batch and impeller version as the first and ran flawless up till this past weekend. I never did get around to RMA'ing the pump for one reason or the other, so it sat on my desk.

This past weekend, I noticed that the 2nd pump would experience occasional "squeaking" for short durations. I couldn't have that so I drained my loop and opened up the pump for some debugging. I found a very small amount of metal shavings stuck to the impeller (the bottom metal part) and cleaned those off. While I did this I also cleaned out the 1st pump (that experienced start-up failure) and noticed a very small plastic fragment in the impeller housing. Cleaned everything up, but instead of putting them back together like normal, I swapped impellers between the 2 units and used the original DDC-2. (I did it for !@#%%-n-giggles more then scientific method)

As of yesterday, I have experienced no startup failure. So there are a couple of changed variables here but to I would suggest anyone experiencing startup failure with their DDC pumps to perhaps look at cleaning the impeller and the housing as a last ditch effort to fix the problem. Maybe debris in the housing is causing the impeller to "stick".
02-19-2007, 04:03 PM
SiGfever

Quote:

Originally Posted by Petra

As far as reliability goes, only time will tell (though, the ~5% failure rate that's been observed with the current ones have practically all been DOA/dead within 48 hours... so the long-term reliability seems to be good). There may be a small performance increase but, again, they haven't sent me one yet so I can't say for sure (working on that, though).

*edit* The only "official" specs that I've seen for the new pumps has been for experimental/prototype/modified versions but I'll ask for stock numbers.

In an email to their tech support he stated that..."The Failure rate of the DDC is less than 1/2 % ;so if you are experiencing more’ perhaps it is the application or installation".

When I asked about the new "blue" impellers this is what I got..."I have no idea what you are talking about ;blue vs orange impellers".
02-19-2007, 05:34 PM
Petra

Quote:

Originally Posted by SiGfever

In an email to their tech support he stated that..."The Failure rate of the DDC is less than 1/2 % ;so if you are experiencing more’ perhaps it is the application or installation".

The 5% figure is based on my own observations, my own observations are based on a relatively small sampling of pumps (vs. the total number produced), and, therefore, that failure rate that Laing gave you is likely a more accurate representation of the DDC product line as a whole.

Quote:

When I asked about the new "blue" impellers this is what I got..."I have no idea what you are talking about ;blue vs orange impellers".

Figures :rolleyes:

Thanks to a phone conversation that I just had, I should be receiving one of the new pumps within the next week or so.

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