I've been using my Tunze Osmolator for 3 months now and love it. It works great except I have the same problem every time I do a water change.
When doing a water change, I power the unit off. When I'm ready to power back on, I flip the power switch on, and the tunze powers up as usual. But no matter where the water level is after the water change (high or low), the tunze automatically starts pumping. And it doesn't stop. Even if the water is an inch higher than it should be in my sump, the tunze pumps water and keeps pumping. I've found a temporary fix, but its a pain. Every time the water starts pumping, I pull up on the manual float switch (which sounds the alarm and stops the pumping). As soon as I let go of the float switch, the tunze starts pumping again. I have to repeat this process between 5 and 8 times, and for whatever reason it always returns to normal. The pump shuts off and doesn't come on again til the water level gets below the optical sensor.
I know its not a siphon problem because I had that happen once with a larger container. My top off container is lower than my sump. Not sure why it goes into this mode, but its a bit of a pain. I have always had luck returning it to normal operation, but I'd like to be able to turn the unit off/on without having to go through this procedure to get the unit to operate correctly.
One other thing to note, is that when I first power the unit up after a water change; all 4 lights go on, and then the pump kicks on and the "too low" light kicks on. This happens every time, no matter what the water level is at. I always top off the system with an extra half inch of water in the return chamber, so that the tunze doesn't have to pump in any water immediately. However, it always says the water level is too low. I've even tried cleaning the optical sensor, over and over again. And I know its not that because it works flawlessly all the time.
Any help is much appreciated!
Thank you!
When doing a water change, I power the unit off. When I'm ready to power back on, I flip the power switch on, and the tunze powers up as usual. But no matter where the water level is after the water change (high or low), the tunze automatically starts pumping. And it doesn't stop. Even if the water is an inch higher than it should be in my sump, the tunze pumps water and keeps pumping. I've found a temporary fix, but its a pain. Every time the water starts pumping, I pull up on the manual float switch (which sounds the alarm and stops the pumping). As soon as I let go of the float switch, the tunze starts pumping again. I have to repeat this process between 5 and 8 times, and for whatever reason it always returns to normal. The pump shuts off and doesn't come on again til the water level gets below the optical sensor.
I know its not a siphon problem because I had that happen once with a larger container. My top off container is lower than my sump. Not sure why it goes into this mode, but its a bit of a pain. I have always had luck returning it to normal operation, but I'd like to be able to turn the unit off/on without having to go through this procedure to get the unit to operate correctly.
One other thing to note, is that when I first power the unit up after a water change; all 4 lights go on, and then the pump kicks on and the "too low" light kicks on. This happens every time, no matter what the water level is at. I always top off the system with an extra half inch of water in the return chamber, so that the tunze doesn't have to pump in any water immediately. However, it always says the water level is too low. I've even tried cleaning the optical sensor, over and over again. And I know its not that because it works flawlessly all the time.
Any help is much appreciated!
Thank you!
