osmolator dc output?

[mc-cro]

I have a 3155, been running it for about 6months.
the other day my top off pump quit working.(its in a fresh water resovoir). I figure its only 6months old, it shouldnt have burnt out already just running ro/di water through it.

start checking voltages, and my power supply is putting out a little over 12vdc when on the 9v setting, and close to 16vdc on
the 12v setting- this is straigh out of the p.supply.
If I take a reading at the output to the pump connector, it drops slightly, down to about 11.5vdc, and about 14vdc. is this too much voltage? did this cause my pump to burn out? I also checked the power supply on several different circuits in the house to make sure that particular plug
wasnt giving out too much juice and had the same readings.

before I go and buy a new pump I want to make sure Im not gonna burn another one.

 

[rvitko]

I can send you a new pump, they generally last about 18 months so they are definitely something that should be considered a consumable. They are cheap, they work on DC power and are safe and capable of the high head delivery, not alot of options in that regard so that is why we use this pump but reliability could be better. The transformer is rated at 115V, here I get between 122 and 127 from the mains so that acounts for most of the difference in output, the 12V setting puts out a lot of juice and can further reduce pump life but the 11.5V going to the pump shouldn't be an issue.

 

[mc-cro]

great, I just wanted to make sure I was within spec. I do kinda consider the pump a consumable. 18months is very acceptable, 6 months ...well.