run speedwave 2640 without controller?

[mike31154]

Originally Posted by roblarss

As far as im aware you still need to use the controller supplied or a similar device. The replacement power supply will only supply voltage to the pump. The 3rd wire will tell the pump how fast to run.

A spare power supply will though tell you if the controller is really at fault or if its an issue of the power supply, which is fairly common.

If you check out the link I provided earlier on wire colour coding, green/yellow is most likely a safety ground. Seems like a pretty universally accepted convention. That would make the red & blue positive & negative DC supply wires & the pump should run with the appropriate voltage applied there, sans controller.

It's unlikely that a pump in this price range is going to have much sophistication housed within the pump itself, like control circuit feedback wiring. It simply reacts to varying voltage provided by the controller. Will run at a constant speed if presented with a constant voltage. I believe it's also a submersible pump, so a safety ground wire (green/yellow) is probably a very good idea.

And yes, any spare power supply will help determine which component is not working as advertised, even if you don't hook it directly to the pump.