Comments for Aquabot not pumping, motor replaced, Still not pumping.

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Apr 26, 2009
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starstarstarstarstar 		Valuable Aquabot Lesson
by: Curt

...for anybody that may have a similar problem with their Aquabot.
Thanks for the update.
Apr 26, 2009
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starstarstarstarstar 		Problem solved
by: Matt

Curt, first, thank you for your prompt assistance and ideas... the new pump is good, and the problem ended up being the impeller binding against the plastic "outlet bottom" due to over-tightening the mounting screws (the plastic bent outward slightly, preventing the impeller from turning). All fixed!
Apr 25, 2009
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starstarstarstarstar 		Maybe a bad pump?
by: Curt

The voltage Generated by a Turbo transformer is about 35 volts A/C. Is possible the contact at the terminals may not be good and is also possible you got a pump with a bad capacitor.
2 things...power up the robot and give the impeller a push with your finger. If it runs normally then return the pump.
The other is to connect the pump directly to the cable wires bypassing the motor terminals. If the pump still won't run with no help then I think the test shows conclusively the pump is defective.
Apr 25, 2009
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starstarstarstarstar 		Capacitors?
by: Anonymous

I just realized you said the capacitors are inside the pump. But I ordered and replaced the entire pump assembly with no change in the condition. The only other major unit as I can tell is the drive motor, which goes for around $300. Do you know what voltage should be going to the pump at the terminals? Maybe the voltage isn't adequate anymore?
Apr 25, 2009
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starstarstarstarstar 		Aquabot Capacitor replacement
by: Anonymous

The capacitors are set in resin inside the pump. They are not easy to replace as the job involves rewiring the pump and changing the shaft oil seals. Check with Aqua Quality Pools and Spas for a replacement.
Apr 25, 2009
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starstarstarstarstar 		Bad capacitor
by: Matt

Thanks for the information, Curt. That actually makes a lot of sense. Are the capacitors on the circuit board within the drive motor housing and replaceable (I can solder, if need be)? It looks like it is possible to get to the circuit board following your "Auquabot Motor Autopsy"... Or should I just bite the bullet and get a new drive motor unit for around $300?
Apr 25, 2009
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starstarstarstarstar 		Sounds like bad capacitor.
by: Curt

Hi Matt,
Usually the humming noise is caused by a bad capacitor, these pumps have 4 of them. The capacitor provides a "kick" start to turn the motor.

One way to check, if the motor starts working when you move the impeller, it is a capacitor problem. Take it back for a new one.

Let me know if you need any further help.

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