Tunze 3155 Issues

[skijumpersc]

I bought a used tank a couple days ago that came with a Tunze 3155 ATO. When I first set it up on my tank its been having trouble priming. I cleaned it with vinegar and tried turning it upside down and shaking it to get any air out, but it still had the same issue. I found if I opened the controller up and turned the pressure up I can get it to prime, but now I'm having the issue where it fills past the optical sensor and doesn't stop until it hits the float.

I have it set up in the return pump chamber of an RSM 130.


Has anyone had similar issues?

 

[GoVols]

I ran it on an ole Red Sea 130 too.

At times I needed to soak the and clean the optical sensor.

But... I ran the unit on it's lowest setting, and never had any priming issues.

 

[Fudsey]

How much head pressure is it try to push? Most of these small ATO pumps can't cope with much at all.

 

[jda]

Viktor is around on the other board and very helpful if you need him. Maybe he has a forum on here too, but I do not know.

 

[skijumpersc]

How much head pressure is it try to push? Most of these small ATO pumps can't cope with much at all.

Only about 3 feet. I'm tempted to buy a replacement pump, but if the sensor is malfunctioning as well I don't want to put more money into it

 

[5altkreep]

These days mine seems to be priming a little slower than it used to. I just make sure I never run my top off container dry, and avoid the issue altogether. If I wait too long usually a quick swirl gets it going.

I'd go ahead and buy the replacement pump. They're only 20-25 bucks, and if you ever need it you'll be glad to have it on hand.

Make sure the optical sensor is nice and clean, and that it's in a calm area of the sump with no bubbles hitting it. Sorry
It's not much help, that's about all I got.

 

[skijumpersc]

I wonder if its losing power. when I turn the pressure all the way up it primes and will pump up to the tank, but if i dial it back as its pumping it tends to die right about when i get to the default setting

 

[Fudsey]

At 3' that could be the issue especially seeing as it was used. I'd try raising the ATO container to test it before I would get another pump, but that might be the answer too.