Thank you for reading.
I searched related topics here and found nothing related, so here goes . . .
I have a standard Halcyon booster pump for Polaris cleaner. The pump and pool had been inactive for about a year. I cleaned and restored the pool. The entire rest of the system is circulating and running well with an Intelliflow main pump.
I initially powered up the Halcyon pump and it just hummed loudly for a moment and I promptly shut it off before it could trip the internal temp switch. I figured it was jammed from sitting still for a year and removed the impeller cover. Sure enough, the impeller was stuck but I turned it by hand with just a little effort to unstick it and when I restored power to the pump with the impeller exposed, it spun at high speed. I then replaced the gasket and cover and tightened the band on the cover. I restarted it and it moved water as expected from the auxiliary outlet.
Later that day, when I tried turning it on again, it hummed and did not spin. I again removed the impeller cover and the impeller was very free spinning. I powered the pump up but it just hummed and the impeller did not spin even when I manually and easily turned it. The temp protection clicked as expected and after cooling, it did the same thing again.
So I need to troubleshoot.
1) The spindle is free turning and is not bound
2) The motor gets power and hums when powered on
3) But the spindle does not turn at all
Electrically, it sounds and acts the way the motor would act if the impeller was jammed, but it is not jammed.
Regards . . .