Tunze Osmolator Universal 3155

[nly04]

I have had my ATO for around 6 month and never had a problem till 2 days ago. All the LED are flashing and alarm go off even though the water level may be level, or actually too low.

I open it, soak it up in vinegar with warm water for 15m and clean it. I put everything back together and it work normally, I also test the float sensor and the pump stop pump water water when I move the float vale up.

The issue is after 30 min or so the alarm go off and all the LED are on. The power and the level flashing green but the low and high are flashing red.

I notice if I unplug and plug it back with work right away. It pump water in and stop at the right water level that I set but alarm go off again in around 30 min or so. Please help.

 

[rvitko]

This is a power cycle, you probably notice it does the same flash and beep every time you plug it in, something is causing it to turn on and off.

1) Weak power connection, the most common cause is that at some point the DC power tip landed in saltwater and they then corrode instantly from the combination of DC current and salt, the plating basically reverses, the outer shell will look fine but the inner or + will be corroded and no longer have the nickel plate. In some cases cleaning will get the connection back to par, otherwise the power supply will need to be replaced.

2) Weak power supply, if you have a voltmeter confirm the output is 10-12V DC.

3) Bad pump or bad pump connection, if the pump is faulty or the pump connectors are wet or corroded, it will overload the power and cause the same cycling.

 

[nly04]

I will check those wire and power supply and the pump later today. I dont think the pump is bad because it pump fine every time i unplug and plug back the power. I will let you know tomorrow. Thank you rvitko,

 

[nly04]

I took everything out last night and inspected every inch of wire from pump to controller, from sensor to controller, from controller to power adapter and everything look good, no crack, no broken. I plug it back and still have the same issue after around 30min.

Then I disconnect the pump to the controller by remove the two tripped wire, switch the wire from one connector to the other and put it back. For some reason, it work for more than 12 hrs without problem. The wire polarity should not be an issue. Weird, I will update in a couple days if It still running. Thanks.

 

[rvitko]

The polarity should make no difference, if it acts up again I suspect this was just coincidence and it is the pump or a loose connection.

 

[nly04]

By the way, what is the warranty for this bro rvitko?

 

[James77]

2 years from purchase

 

[nly04]

It just went off again with the same issue as state above. It so annoying I have to unplug the power. Is there a way to reset or to test individual part to find out which part is wrong?

 

[rvitko]

You could test the power supply with a voltmeter, it is 11V but anything between 9-13V is OK. You could try the controller with no pump, if the display is consistent and normal and the power supply check out with a voltmeter we can safely assume it is the pump.

 

[nly04]

I will try again later today and will keep update. Thank you for the tip.

 

[nly04]

I don't know what happen but seem like it work fine again. crazy huh. Thank you for your help Vitko.