Osmolator problem

mr9iron

15& Over Club
Premium Member
Roger, a fellow reefer posed this question to me in another forum and I don't have an answer for him so I decided to post it here for some help.


mr9iron: I have a problem with my new TUnze Osmolator. Can you assist please...I bought the new 2010 version of this top up with the new magnet attachmens. Anyway, the problem is tha because the unit runs for a minimum of 10 seconds to prevent too frequent topping up etc, it cause the water to reach the safety sensor and hence alarms. I then situated the two sensors on different magnets so that the operating sensor is located far below the safety sensor. Even then sometimes the water continous to pump and the operating sensor gets completely submerged.

Also, if i turn the power off and on, the controller decides to top off for 10 seconds each time regardless of the fact that the operating sensor should tell the controller the water level is ok!

What the heck is going on? :mixed: Can you help and let me know how you have yours setup please. Its doing my head in.

Maybe I got a fault unit?
 
If this is on a very small tank, like less than 30 gallons with no sump, then he probably needs to just add a small valve to the hose, drip irrigation valves are ideal, but a small plastic air valve will also work. This way he can reduce the flow so the 10 second run will not be of any consequence. He should also check though the sensor isn't attracting air bubbles. If it is working properly and it is just the 10 second delay, for the duration of the delay the yellow and green LED's on the controller will be lit at the same time.
 
If this is on a very small tank, like less than 30 gallons with no sump, then he probably needs to just add a small valve to the hose, drip irrigation valves are ideal, but a small plastic air valve will also work. This way he can reduce the flow so the 10 second run will not be of any consequence. He should also check though the sensor isn't attracting air bubbles. If it is working properly and it is just the 10 second delay, for the duration of the delay the yellow and green LED's on the controller will be lit at the same time.

Thanks Roger, I will post this for him. :thumbsup:
 
Hi Roger,

It was me mr9iron is helping.

I have the 28G JBJ nanocube tank.

I didnt quite understand the drip irrigation valve. Essentially do I restrict flow so that the rate of water flow is reduced hence the 10 second action is a non issue? Would this damage the pump?

Also, another issue I have is that if I turn the power off and turn it back on, each time this happens the unit pumps water into the tank for 10 seconds regardless of the fact that the water level is fine. Whilst my electricity cutting out many times over a day is rare, such an occurance would mean the tank may overflow or at least salinity is greatly reduced. Is this built into the design or is my unit faulty in this way?

Many thanks for your help. I am going on holiday soon, hence why I bought the unit, but need it working 100%. Regards.
 
Yes, you are just restricting the flow of the pump, it will not harm the pump to do this.

What you describe is normal, it is due to a capacitor charging up which runs the optic sensor, it shouldn't take the full 10 seconds, but likely 2 or 3. It is a distinct function from the 10 second delay in that it isn't part of the programming of the unit, it just happens because the optic sensor doesn't have enough power to "see" for the first couple seconds when power is applied. If it takes longer than about 3 seconds this could mean the capacitor or optic sensor is faulty.
 
Hi Roger, I timed the off/on cycle this morning. ie when I switched it on, the pump ran for 19 seconds 1st try, 2nd try: 4 seconds, 3rd try 18.6 seconds exactly before the pump was switched off. During this time, the yellow pump light was on, and the green light was on.

This cannot be a normal function of the unit? I think the sensor mus be faulty, because even though I have cleaned it and no bubbles are present, when it tops up, sometimes water is topped up way above the tip of the optical sensor leading to it being completely submerged, it then stop sometimes before it water hits the safety sensor, but sometimes the safety sensor is triggered off.
 
I switch it off and on for a 4th time after the above post and it ran for 19.8 seconds. I am timing with a stop watch, not by counting.

In the event of a power failure etc, this will definately cause the unit to dump way too much water into my tank!
 
Yes, I would agree. Something has to be wrong with the controller. It can take 10-20 seconds for the pump to shut off when registering full, but not when the power is first applied, this should take 0-5 seconds at most. I would contact Tunze UK.
 
Hello again Roger. I had the faulty controller/sensor replaced by a new controller/sensor. The new one does not exhibit the problem I mentioned above, in fact if I power it off and then turn it back on, it doesnt make the pump run for 19 seconds like the faulty unit did.

The only issue I had with the new controller is that the first time I turned it on the empty red led at the bottom and the red led at the top came on together. The description on the booklet said that if these two red leds light up and there is also an alarm sound (which there was), this means the controller has water in it and needs to be sent in for repair etc.

Well, I know full well I didnt drop it in water etc. So I just turned the power off and switched it on a few mins later. It just worked fine from then on. I checked everthing this morning and its been working fine.

I also switched it off and then on and the controller didnt exhibit any problem.

My question to you is could these red leds coming on been a fluke of the unit being turned on the first time?

I am going away next week and dont want to leave things to this top up if you feel it may become faulty. I will just arrange someone to look after the tank.

But because it has been working fine after the second time it was switched on I feel its going to be ok. But just wanted your opinion on this as well for reassurance sake.

Many thanks.
 
It is always best to have someone stop by and check on things, the Osmolator isn't intended to be left unattended for long periods of time. Water damage is only one of the possible causes, a magnetic field near the controller can also cause this (switching in the relay which is a magnetic switch) as can a high float switch with the optic sensor being out of water (conflicting signal of too high and too low). My guess would be it was one of these two that happened during set up.
 
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