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Posted by on April 1, 2007, 9:48 am
wrote:
> On 31 Mar 2007 20:48:40 -0700, davidl...@pacbell.net wrote:
>
>
>
>
>
> >Hi All,
>
> >Bought a brand new 3/4 hp hayward pool sweep pump from ebay. Well
> >guess what. The pump runs but the motor housing gets so hot you can't
> >touch it. Motor's pulling around 9.5A on 220V which seems too high.
> >Any ideas what might be wrong with the "new in box" pump deal from
> >ebay? I'm going to try to call hayward tech support on Monday and see
> >if I can get a warranty replacement. Seems odd though that a new motor
> >would have problems. Here's what I've checked so far:
>
> >1. Measured 240 volts right at motor terminals.
> >2. Centrifical starting switch seems to be opening when motor comes up
> >to speed.
> >3. Motor makes a grrring noise and has a slight vibration.
> >4. Double checked the wiring.
> >5. Current is ~9.5A.
>
> >Over temp switch doesn't shut off though. Although I haven't run it
> >more than 30mins in fear of something melting down. Here are my
> >guesses of what might be wrong:
>
> >1. Shorted or open field winding?
> >2. Rotor defective?
> >3. Starting cap defective? (seems to start fine though and come up to
> >speed)
>
> >Anybody have ideas on what might be wrong? Isn't 4 to 5 amps about
> >right for a 3/4 hp motor running on 220V?
>
> >Thanks in advance
>
> >Dave
>
> Are you sure there are no restrictions? Does the flow seem right?
> Might you have a plugged screen or filter? It sounds like there is
> too much back pressure. You're right, current is too high for 3/4
> horse.
>
> One more thought...are you sure it's wired for 220? often they are
> dual voltage.
>
> HTH,
>
> Paul- Hide quoted text -
>
> - Show quoted text -
Back pressure was something I questioned as well but even running with
the pump discharge port open to the air, get the same results. Also,
when connected up to the pool cleaner line, which has a valve in it, I
closed the valve and the current when down about .5 amps.
I checked and double checked the wiring an it's wired according to the
name plate.
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