View Full Version : Osmolator pump

09/06/2017, 02:18 PM
Hi Roger - Problem with my osmolator. The pump runs for approximately one minute then slows to a stop. If I unplug it for a couple minutes, it fires up again for about a minute then slows to a stop. The control unit is well over 10 years old. I replaced the power supply with a generic one years ago and I have replaced the pump a few times. Is it time for a new pump?


09/06/2017, 02:28 PM
This is a somewhat complicated problem so the answer is not very simple.

An Osmolator made before 2009 used an 800mA PTC as a sort of circuit breaker for the pump, since 2009 it is 1200mA as in late 2008 we requested the pump manufacturer customize the Osmolator pump with a double o ring seal to increase the durability, the added drag needs more mA of power to run the pump. What you are seeing is more than 800mA is required and as a result the PTC is breaking contact. The key to solving this is to get the draw below 800mA, this means clean wiring, no corrosion, a 9V power supply, the original was switchable 9-12V and 9V will reduce the mA consumption, of course the pump also runs slower and a good working pump, the higher the head pressure the less mA draw as well. If all these are in order it should work, long term if ignored a transistor will overheat and damage the controller irreparably. If it was me, I would strongly consider just replacing it when the big black friday sales roll around as with the age, more issues are probable in time.

09/06/2017, 03:01 PM
Thanks for the quick reply. I certainly got my moneys worth with this one and will take your advice for for a new one.