Customer support

FAQ

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We are here to help and in this section you will find FAQs, troubleshooting, warranty information and video tutorials. If you can’t find what you are looking for, please contact us. For fastest response please write to us in English.

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Top 10 FAQ

  • D250SA: Can I use D250SA for lithium batteries?
    See answer

    No, it works only with lead acid batteries.

  • D250SE: Can I use D250SE for lithium batteries?
    See answer

    Yes it works both with lead-acid and lithium (12V LiFePO₄) batteries.

  • M25, MXS 7000, M100, M300, MXS 25EC, ZAFIR 100, M200, M15, MXS 7.0: is lit for 4 hours and then turns into error mode
    See answer

    If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased in the way it should have done.

    Explanation 1: The battery is too large in relation to the capacity of the charger.
    Test: Make sure that the battery/batteries size is not larger than the recommendations.
    Test: Try to restart the charger because the charger might need more time to charge the battery.

    Explanation 2: Larger loads are connected to the battery.
    Test: Disconnect the battery and try to charge it without the loads.
    Test: Try to restart the charger because the charger might need more time to charge the battery.

    Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely due to a defective cell in the battery.
    Test: Change the battery.

  • D250SE, D250SA: Do I need an external regulator for the solar panel?
    See answer

    No

  • D250SA: How do I connect D250SA?
    See answer

    Please refer to manual or web page for fitting instructions. https://www.ctek.com/customersupport/dc-dc-support

  • D250SE, D250SA: Which is the recommended size for solar panels?
    See answer

    The recommended size of panel is 50-300W.

  • D250SA: Where would I use the D250SA?
    See answer

    Any application involving a secondary battery or solar panel- please refer to manual or web page for fitting instructions.

  • D250SA: How do I activate the AGM setting?
    See answer

    The D250SA has a wiring harness with a black and a red wire, the black wire must be earthed / grounded to change the charging voltage for AGM.

  • MXS 25, MXT 14, MXS 25EC: Temperature LED is flashing
    See answer

    Explanation: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.

  • CONNECT CIG PLUG: Can I use your CONNECT CIG PLUG to charge the battery through the cigarette socket in my car?
    See answer

    Yes, but you should check that you have voltage to the socket even if the vehicle is switched off. If, for example, you can charge a mobile phone or get a GPS to work when the car ignition is switched off, you can also charge the car battery this way.