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Thread: Pump motor diagnostics...

  1. Back To Top    #1

    Join Date
    Apr 2013
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    Fayetteville, GA
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    Pump motor diagnostics...

    Less then 2 years and it appears this motor has failed.
    When power is applied it just makes a thud/click noise and does not turn. Is there a way to check the capacitor?

    NOTE- I control 2 speed ops through my Autopilot SWG controller so I have electrically by-passed the controller on the motor.



    The shaft turns freely.
    18 x 36' Liner ~26,000g, 1 Skimmer (Supply)- 2 & 1 1/2" pipe, 3 Returns (jets), HEAD- ?, FILTER- Hayward 12002, 230v, SWG- AUTOPILOT DIG-220, PUMP- Challenger 346204 w/ USA MOTOR (rebuilt) SF 1.25/,02, CLEANER- Polaris 280- AO Smith 3/4hp., FEATURE- Hayward 1.5 HP Super Pump.

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    mas985's Avatar
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    Re: Pump motor diagnostics...

    Given the picture, I assume you checked to see if the shaft turned easily?

    If you have a multi-meter, you can do this:

    To test the capacitor with a multimeter, set the meter to read in the high ohms range, somewhere above 10k and 1m ohms. Touch the meter leads to the corresponding leads on the capacitor, red to positive and black to negative. The meter should start at zero and then moving slowly toward infinity. This means that the capacitor is in working condition. If the meter stays at zero, the capacitor is not charging through the battery of the meter, meaning it is not working.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  3. Back To Top    #3

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    Re: Pump motor diagnostics...

    I just tried applying power and manually spinning shaft....did not start.

    If I pull the Cap is there any shock danger?
    18 x 36' Liner ~26,000g, 1 Skimmer (Supply)- 2 & 1 1/2" pipe, 3 Returns (jets), HEAD- ?, FILTER- Hayward 12002, 230v, SWG- AUTOPILOT DIG-220, PUMP- Challenger 346204 w/ USA MOTOR (rebuilt) SF 1.25/,02, CLEANER- Polaris 280- AO Smith 3/4hp., FEATURE- Hayward 1.5 HP Super Pump.

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    mas985's Avatar
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    Re: Pump motor diagnostics...

    In an AC circuit and as a start capacitor, it should not hold much if any charge. But you can just short the terminals with a screw driver to make sure.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  5. Back To Top    #5

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    Re: Pump motor diagnostics...

    I think this is a good test...bad motor.


    18 x 36' Liner ~26,000g, 1 Skimmer (Supply)- 2 & 1 1/2" pipe, 3 Returns (jets), HEAD- ?, FILTER- Hayward 12002, 230v, SWG- AUTOPILOT DIG-220, PUMP- Challenger 346204 w/ USA MOTOR (rebuilt) SF 1.25/,02, CLEANER- Polaris 280- AO Smith 3/4hp., FEATURE- Hayward 1.5 HP Super Pump.

  6. Back To Top    #6
    mas985's Avatar
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    Re: Pump motor diagnostics...

    Could be a bad thermal limiter too. You did say that the relays are out of the circuit? You might just want to do a continue check to make sure the line voltage is reaching the motor.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    In the Industry

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    Re: Pump motor diagnostics...

    Looking at that shaft for 2 years it's not supose to be rusty with that back cover on it. Hard to tell but it looks like bottom nut at motor that connects to seal plate is oxidized. My guess is you had a pump seal leak and let it go. When you have

    a pump seal leak it spits chlorinated water down the shaft into the motor causing the ball bearings to rust out. Time for a new motor, unless that pump is older 10 years old then best to replace the whole pump.
    '
    40k Gallon Grecian true L Gunite Pool/Spa. Clean clear plus 520 cartridge. IntelliFlow VS-3050. Polaris booster pump w/ Polaris 360 cleaner. Silencer 1 1/2 hp Blower. Aqualink RS8 w/ Iaqualink 2.0 upgrade kit.

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    Re: Pump motor diagnostics...

    The motor was pretty inexpensive. It was a re-built motor.

    False economy.

    Probably going to go top o line now.
    18 x 36' Liner ~26,000g, 1 Skimmer (Supply)- 2 & 1 1/2" pipe, 3 Returns (jets), HEAD- ?, FILTER- Hayward 12002, 230v, SWG- AUTOPILOT DIG-220, PUMP- Challenger 346204 w/ USA MOTOR (rebuilt) SF 1.25/,02, CLEANER- Polaris 280- AO Smith 3/4hp., FEATURE- Hayward 1.5 HP Super Pump.

  9. Back To Top    #9

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    Re: Pump motor diagnostics...

    Looks like it would be a good time to replace the motor with a 2 speed. You would save a lot in electricity costs.
    38000 Gal, IG, Plaster, 20' x 40' x 10', Attached Raised Spa, Intelliflo VS 3 HP (011018), Pentair Quad DE 60 Filter, Raypak (Rheem) 400,000 BTU (407a low Nox), Easy Touch 8 upgrade, Screenlogic 2 with wireless, IS-4 Spa Side Remote, Stenner 45MPHP10 w/15 gal tank, Intellibrite 5g (3), Dolphin Triton Plus robot with PRO remote, Water Tech Catfish handheld vacuum for spa, TF100 with SpeedStir.

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