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solar pane controller

  • 01-07-2012 8:07pm
    #1
    horatio1
    Registered Users, Registered Users 2 Posts: 10 ✭


    Hi, went to turn on the emersion and noticed that the lcd display was flashing a warning sign(!) and that the temp in the top of the tank was 110c. We have had no sun today and heating hasn't been on. Anyone any ideas ?

    Thanks


Comments

  • #2
    quentingargan
    Registered Users, Registered Users 2 Posts: 1,627 ✭✭✭quentingargan


    horatio1 wrote: »
    Hi, went to turn on the emersion and noticed that the lcd display was flashing a warning sign(!) and that the temp in the top of the tank was 110c. We have had no sun today and heating hasn't been on. Anyone any ideas ?

    Thanks
    Was the top of the cylinder actually 110 degrees? I hope not - on an open vented system, it would boil at 100 and on an unvented system, the relief valve should have been discharging the cylinder.

    So that would leave it down to the probe, or the controller being wrong. Has it changed since?

    If you can read the resistance on the probe and post it here, along with more info on the controller, there should be someone who can let you know if that tallies or not.


  • #3
    horatio1
    Registered Users, Registered Users 2 Posts: 10 ✭horatio1


    Hi Quentin, not a D.I.Y bone in my body .How would i find the probe and check the resistance? It is still reading the same but the tank is definitely not 110 degrees we have no hot water. the model is an sr868c8 , plumber got it from heat merchants. Put it into google and it came up as the maker being sunpeak usa.I can find the users manual on line but dont really know what im looking for.


  • #4
    quentingargan
    Registered Users, Registered Users 2 Posts: 1,627 ✭✭✭quentingargan


    Afraid you might be looking for an electrician or a good DIY enthusiast.

    The controller measures temperature by measuring the resistance of probes with a resistor that varies with temperature. I would try swapping the wires from the two tank probes to see if it changes to reading the bottom of the cylinder at 110. If it does, then the fault is in the probe, if not it may be in the controller.

    This controller uses an unusual set of probes - the ones in the cylinder may be different to the one used for the panel. The controller is supposed to detect a faulty probe by giving a symbol, but it is interesting that it is showing 110 degrees, as that is the maximum temperature.


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