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Thread: Low Flow alarm on pool pilot - what can be done?

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    Join Date
    Jul 2011
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    Low Flow alarm on pool pilot - what can be done?

    I am having problems with low flow alarm on my chlorinator. The pump is a vari speed and am having to run it at near full speed to stop the low flow alarm kicking in on Chlorinator.

    I have full return flow going into chlorinator, I have back washed sand filter, checked all filter baskets ( all clean), checked the inline mesh filter to pool pilot but if I run the pump at anything less than 90% the low flow indicator comes on. In the past I was able to run at much slower speeds without issue.

    Can anyone help suggest what might be wrong? Could the pump actually be loosing pumping ability? It's only 3 seasons old. Might the sensor on the pool pilot be broken? Any suggestions greatly received.
    SWG - Exterior
    12x5M
    90,000 Ltrs /24,000US gallons
    Pool Pilot Digital
    Hayward Max Flo VS
    Polaris 280
    Vinyl liner
    Sand Filter

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    mas985's Avatar
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    May 2007
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    Pleasanton, CA
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    Re: Help with chlorinator flow alarm

    What is the filter pressure?

    Is there any way that water might be bypassing the SWG?

    Are you getting good flow out of the returns?
    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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    Re: Low Flow alarm on pool pilot - what can be done?

    filter pressure is now in the green - not sure on the PSI but have done a backwash etc to see if that would help. Returns both flowing out normally (as in no discernible pressure drop when i put my hand in front of them from any other time)...

    the only way for it to bypass SWG would be for either one of the valves - a bypass valve - no longer closing fully, or the pressure bypass of the pool pilot but this would show water running through, which it doesn't.

    It's a mystery!!
    SWG - Exterior
    12x5M
    90,000 Ltrs /24,000US gallons
    Pool Pilot Digital
    Hayward Max Flo VS
    Polaris 280
    Vinyl liner
    Sand Filter

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    mas985's Avatar
    Join Date
    May 2007
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    Pleasanton, CA
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    Re: Low Flow alarm on pool pilot - what can be done?

    a bypass valve - no longer closing fully
    So why isn't this the issue then?
    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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    Join Date
    Jul 2011
    Location
    SW France
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    104

    Re: Low Flow alarm on pool pilot - what can be done?

    Because it does close fully...

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    mas985's Avatar
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    Re: Low Flow alarm on pool pilot - what can be done?

    Quote Originally Posted by Richard_S View Post
    Because it does close fully...
    And it is fully closed while you have this problem?
    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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