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Thread: Whisperflo cutting out randomly

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    Whisperflo cutting out randomly

    OK, I’m stumped. My 2004 Whisperflo 2.0hp filter pump motor just started cutting out randomly for less than a second at a time. System is controlled by a Jandy One-Touch RS8. It happens about every 30 seconds to 2 minutes. The motor and capacitor cover are NOT hot at all. I had this pool built in 2004 and nothing has changed. I’m estimating 20k hours on the pump/motor. Pressure runs 18-22 PSI through a Triton Commercial sand filter. Pool and spa has five 1.5” return lines and two pop-up heads near the main drain which assist the in-floor cleaner.

    I just backwashed the system a few days ago. Good suction and flow from the returns. No weird sounds. No leaks.

    Any ideas?

    Motor or Jandy control issue?

    Thanks in advance!

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    guamguy's Avatar
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    Re: Whisperflo cutting out randomly

    It sounds like a weak relay in the control system
    12,800 gallon IG plaster kidney-shaped pool, waterslide, 800 gallon spa.
    1HP 2 speed Sta-Rite pool pump, 1.5 HP Sta-Rite spa jet pump. 2 skimmers, 1 main drain
    Purex-Triton TR-60 325 lb.sand filter. 2" Plumbing, Intex SWCG, TF-100 test kit.
    Link to pics of my pool! http://www.troublefreepool.com/my-oasis-t26558.html

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    Mod Squad Bama Rambler's Avatar
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    Re: Whisperflo cutting out randomly

    Anything internally that will stop a pump motor will not allow it to start right back up. It's almost 100% a controller issue. It could be a programming issue or an intermittant circuit.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Whisperflo cutting out randomly

    I may give Pentair a call and see if there is a known issue. I am on my third dimmer control for the light. They only seem to last 2-3 years and then they go wacky so maybe there is a similar motor controller part that can be replaced?

    Also, let me clarify that the motor does not even completely stop rotating. It is like a momentary voltage drop if that makes any sense.

    Thanks

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    Re: Whisperflo cutting out randomly

    Quote Originally Posted by guamguy
    It sounds like a weak relay in the control system
    How would I check/test that?

  6. Back To Top    #6

    Join Date
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    Re: Whisperflo cutting out randomly

    not sure how to check it, without an ammeter on the electrical supply to the motor...
    But as stated, anything internal to the motor would likely kill it completely- or would give the same symptoms regularly vice randomly
    Has to be in controller...
    Do you suffer from "brown outs"?
    A drop in incoming power could cause the controller to quit, then pick up again... only an issue if your local electric supply is borderline sufficient for the neighborhood load conditions!
    24ft x 52in AGP 18000 gal
    sand filter, 200#,1.5 hp single speed pump
    Wood deck (still in progress...)

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    Re: Whisperflo cutting out randomly

    Quote Originally Posted by madwil
    not sure how to check it, without an ammeter on the electrical supply to the motor...
    But as stated, anything internal to the motor would likely kill it completely- or would give the same symptoms regularly vice randomly
    Has to be in controller...
    Do you suffer from "brown outs"?
    A drop in incoming power could cause the controller to quit, then pick up again... only an issue if your local electric supply is borderline sufficient for the neighborhood load conditions!
    OK, thanks. No brown out issues here. Development was built in 2003-2004 and has quality electrical service. Plus, the spa jets and in-floor pumps are not cutting out so it is isolated to this motor.

    Question: Do the motors have a load sensor that may cause this? I do know that my spa main drain is plugged with leaves (have not had time to take it apart and clean it out) but it has alternate safety intakes to prevent people from being stuck to the drains. Same goes for the pool main so if it were restricted it has a bypass intake. However, the extra load may be causing the pump to labor. The funny thing is though that the pump is not getting hot. Just warm from normal running.

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    JasonLion's Avatar
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    Re: Whisperflo cutting out randomly

    The pumps will turn off if they overheat, but when that happens they turn of for several minutes at least.

    I suspect a marginal relay.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    guamguy's Avatar
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    Re: Whisperflo cutting out randomly

    Quote Originally Posted by KCAZ
    Quote Originally Posted by guamguy
    It sounds like a weak relay in the control system
    How would I check/test that?
    I would see if there is another similarly rated relay that is unused in the controller and swap them (with power off to the whole system, of course).
    12,800 gallon IG plaster kidney-shaped pool, waterslide, 800 gallon spa.
    1HP 2 speed Sta-Rite pool pump, 1.5 HP Sta-Rite spa jet pump. 2 skimmers, 1 main drain
    Purex-Triton TR-60 325 lb.sand filter. 2" Plumbing, Intex SWCG, TF-100 test kit.
    Link to pics of my pool! http://www.troublefreepool.com/my-oasis-t26558.html

  10. Back To Top    #10

    Re: Whisperflo cutting out randomly

    Quote Originally Posted by guamguy
    Quote Originally Posted by KCAZ
    Quote Originally Posted by guamguy
    It sounds like a weak relay in the control system
    How would I check/test that?
    I would see if there is another similarly rated relay that is unused in the controller and swap them (with power off to the whole system, of course).
    Yes, I was thinking that. The relays are also fairly cheap. I may just pick one up and keep it as a spare if it is not the issue.

    Thanks for all the replys.

  11. Back To Top    #11

    Re: Whisperflo cutting out randomly

    BTW, after spending a little more time observing I noticed that it has a tendancy to cut out after a "cold" start up. That is, after sitting off for several hours. After the pump has run for about 30 minutes the problem seems to go away.

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    Ohm_Boy's Avatar
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    Re: Whisperflo cutting out randomly

    Boy, you gotta hate problems like this. To troubleshoot intermittant drop outs back in my industrial controls days, I used to rig up 'seal-in' circuits using some extra relays which, once energized, would keep themselves energized via a N.O. contact as long as the power stayed on. I used pushbuttons to start them, but jumpering with a meter lead will work for temporary tests. Light bulbs help too, if you're getting elaborate.

    I'd attach them to points in a control circuit so that I could tell where the power dropped and where it stayed on. In this case, I'd attach to inbound power to the controller, and to the outbound power to the motor. After a drop-out, if both were off it'd mean that the main power went down. If just the motor side was off, then it's the controller shutting it off for some reason. If they're both still on, then it's a motor problem. Or a neutral/L2 problem, depending on the way it's wired.

    The ASCII circuit looks like this in it's simplest form:
    Code:
    L1            R                     R       L2
    +------------] [-------------------( )------+
    With a 'start' pushbutton:
    Code:
    L1            PB                     R       L2
    +------+------] [--------+----------( )------+
           |                 |
           |       R         |
           +------] [--------+
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

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