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Thread: Not sure if it's the cell or control unit?

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    Join Date
    Jan 2008
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    Geelong Australia
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    Not sure if it's the cell or control unit?

    Hi there
    I have a Questachlor Xtra salt chlorinator (30 grams/hr) and apart from a brand new cell about 31/2 years ago I've had absolutely no trouble with it. The unit has reverse polarity and the frequency is set to about every 10 days. Red light/green light indicates which cycle it's on.
    Cell is clean and I use a pool shop cell cleaner when the calcium build up occurs but this is infrequently.
    I've noticed the last couple of weeks that the needle on the green cycle falls to the middle of the low salt indicator, so I checked the salt level with a proprietary strip and the salt level is sitting at 5500ppm which I believe according to my pool shop test sheets is just right for my pool. When the cycle changes to the red indicator the needle sits at the high end of the winter range (gauge indicates low salt, winter, summer and overload) and the chlorine output is noticeably stronger. There is chlorine output on the other cycle but its much less.

    Chlorine levels in the pool at this stage being the midst of winter and the water is freezing are fine according to test strips.

    So, I'm wondering is there a problem with the cell or the control unit?? Or no problem at all?
    Cheers
    IG Fibreglass 24,000 litres
    Questa Jetstream Hi-Flow Sand Filter
    Questa Questachlor-Xtra self cleaning Salt Chlorinator
    Questa Supa Jetflow 1.0hp pump
    Solar heating
    Questa Hydrosweep automatic pool cleaner

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    Mod Squad Bama Rambler's Avatar
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    Re: Not sure if it's the cell or control unit?

    It appears that the coating on the cell is worn down in direction. It happens as the cell gets older. It's time to start saving up for a new cell.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp 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: Not sure if it's the cell or control unit?

    You can also try increasing the salt level to the upper level of the recommended range and see if that improves the status. If so, then your cell is on it's way out.
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
    AutoPilot Salt Chlorine Generators www.autopilot.com

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    Jan 2008
    Location
    Geelong Australia
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    Re: Not sure if it's the cell or control unit?

    Hi there
    Thanks for the replies.

    In answer to the last post: that's exactly what I did: I added a 25Kg bag of salt to see if it made any difference. Obviously, it raised the ppm salt level but the needle stayed in the low salt region on the "green" cycle.

    I suspected the cell but couldn't be 100% sure. So, is it ok to leave it working well on one cycle and not the other, till it starts to perform a lot worse?

    And would anyone have a ballpark on time or is that like asking how long's a piece of string?

    Cheers
    IG Fibreglass 24,000 litres
    Questa Jetstream Hi-Flow Sand Filter
    Questa Questachlor-Xtra self cleaning Salt Chlorinator
    Questa Supa Jetflow 1.0hp pump
    Solar heating
    Questa Hydrosweep automatic pool cleaner

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    Mod Squad Bama Rambler's Avatar
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    Re: Not sure if it's the cell or control unit?

    It's hard to say how long it will continue to keep the pool chlorinated. I'd go ahead and replace it as soon as I could.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  6. Back To Top    #6

    Join Date
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    Location
    Geelong Australia
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    Re: Not sure if it's the cell or control unit?

    Quote Originally Posted by Bama Rambler
    It's hard to say how long it will continue to keep the pool chlorinated. I'd go ahead and replace it as soon as I could.
    Hi there

    Yes, thanks for the reply. I'll keep an eye on the chlorine output visually and keep checking levels with test strips and as soon as it starts to diminish any further I'll oreder another cell. In my OP I said the cell was about 3 years or so old but I was wrong! Looked up the original receipt and it's coming up 5 years, so no complaints here!

    Cheers
    IG Fibreglass 24,000 litres
    Questa Jetstream Hi-Flow Sand Filter
    Questa Questachlor-Xtra self cleaning Salt Chlorinator
    Questa Supa Jetflow 1.0hp pump
    Solar heating
    Questa Hydrosweep automatic pool cleaner

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