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Old 09/23/2018, 12:17 PM   #1
bluecard
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Join Date: May 2018
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New Tunze 9410 dc loud grinding noise

Hi Roger,

I need some advice. I purchased a 9410 dc this week and it is making a loud grinding noise. The noise goes away if I pinch the air line from the silencer to the skimmer. It will run pretty quiet for a little while and start making the noise again. I up’d my water level from 6.5 to 7 with no difference. It is also not generating hardly any skim. I turned it up to 100 percent with no results. I realize the skim could be part of the break in period, but I read most people run around 50 percent. The foam doesn’t even get close to the top at that level. I took an audio clip of the noise and then pinched the line, so you could hear a difference. Not sure if the pump is faulty and I need to return the skimmer.
Thanks.

Jason


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Old 09/24/2018, 09:34 AM   #2
rvitko
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The motor coil is misaligned and we need to replace the pump, I can send a new pump, can you email me a copy of the receipt? In general this skimmer would be run with the pump at about 30-40% power. The coil is too high so the impeller rubs the intake and is slowed and makes noise. email is Tunze at sbcglobal dot net.


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Roger Vitko
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"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"

Current Tank Info: 210 gallon planted tank with Altum Angelfish
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Old 09/24/2018, 09:48 AM   #3
bluecard
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Thanks Roger! I sent my receipt along with a sound clip. The first 2 seconds is the noise and the last 3 seconds is after I pinched the airline. I will also mention my apex shows it pulling 15 Watts at max power, which seems low per the specs.


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Old 09/24/2018, 10:01 AM   #4
rvitko
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The specs are wrong, it should be 15W, before we started making it we found a coil winding change that dramatically reduced the power consumption.


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Roger Vitko
Tunze USA

"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"

Current Tank Info: 210 gallon planted tank with Altum Angelfish
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Old 09/24/2018, 11:31 AM   #5
bluecard
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Even better. Thank you for all your help.


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Old 10/01/2018, 07:06 AM   #6
bluecard
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Thank you Roger! Everything is working great now.


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Old 10/01/2018, 08:30 AM   #7
rvitko
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Awesome! I am happy to hear that!


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Roger Vitko
Tunze USA

"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"

Current Tank Info: 210 gallon planted tank with Altum Angelfish
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