Customer support

FAQ

Welcome to CTEK and thank you for being a valued customer.

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.

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Top 10 FAQ

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

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

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

    No, it works only with lead acid batteries.

  • CT5 START/STOP: What do the three stages on the charger mean?
    See answer

    Check mode means that the charger is checking the battery’s state of health and preparing to charge. If the battery is in good condition, the Check stage doesn't take more than a few moments.
    The Charge mode LED shows while the charger is filling the battery, and Care shows when the battery is fully charged and the charger has automatically switched over to maintenance charging.

  • Batteries: Can I charge Lithium batteries with a regular CTEK charger and vice versa?
    See answer

    No. Lithium batteries needs a different charge than lead/acid batteries. Due to severe risks if overcharging, we do not recommend using a CTEK charger that is developed for lead/acid batteries, for that purpose.
    Charging lead/acid batteries with a Lithium charger does not give the best result and cannot be recommended.

  • PRO BATTERY TESTER: What does the PRO BATTERY TESTER tester do?
    See answer

    It measures State of health of the battery, and can also test starter motor and alternator function.

  • PRO BATTERY TESTER: What batteries can be tested with a PRO BATTERY TESTER?
    See answer

    You can test 12V lead/acid starter batteries between 100 and 900 CCA.

  • PRO60: Are the clamps better on this one than the 70/50?
    See answer

    The clamps are the same as the 70/50.

  • PRO60: Why does it have different charging modes available when it has adaptive charging?
    See answer

    The PRO60 can assess the battery size not the technology.

  • CTX BATTERY SENSE: Why doesn't the panel with a figure disappear from the Battery Sense icon?
    See answer

    The panel (iPhone) shows how many senders have yellow or red status or haven't been updated in the last seven days. The panel will disappear when the app has updated and/or the state of charge has changed to green.

  • CTX BATTERY SENSE: Why can't I find the app on App Store? I have an iPhone
    See answer

    If you have an iPhone that doesn't support iOS 7 or higher, the app won't be shown on App Store.

  • MXS 3.6, M45, MXS 3600: and is lit (flashing rapidly) simultaneously

    Explanation 1: Bad connection.
    Test: Move the clamps and make sure there is no loose connection in the quick connector, CONNECT.

    Explanation 2: The charger is working in the desulphation phase.
    Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in a very poor condition.

  • XS 800, XC 0.8: and is lit (flashing rapidly) simultaneously and there is a ticking sound

    Explanation 1: Bad connection.
    Test: Move the clamps and make sure there is no loose connection in the quick connector, CONNECT.

    Explanation 2: The charger is working in the desulphation phase.
    Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in very poor condition.

  • XC 0.8: switches to after the charge has been stopped

    Explanation: When the charger restarts the battery voltage is monitored. If the battery voltage is above 6,5V, the charging will not commence. When the battery is between 6,5V and 7,2V it is considered as fully charged. The charging will automatically start again when the battery voltage drops below 6,5V.

  • MXS 3.6, M45, XS 800: switches to after the charge has been stopped

    Explanation: When the charger restarts the battery voltage is monitored. If the battery voltage is above 12,9V, the charging will not commence. When the battery is between 12,9V and 14,4V it is considered as fully charged. The charging will automatically start again when the battery voltage drops below 12,9V.

  • MXS 5.0 CHECK, XS 0.8, MXS 5.0, MXS 5.0 POLAR, MXS 10EC, MXS 10, MXS 5.0 TEST&CHARGE: is lit

    Explanation 1: Reverse polarity.
    Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

    Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
    Test: Turn off or disconnect the loads when charging.

    Explanation 3: The charger is not connected to a 12V battery.
    Test: Test with a fresh 12V battery.

    Explanation 4: The charge cycle is interrupted in step 1.
    Test: Test to restart the charge cycle, if it still fails in step 1 the battery is sulphated and needs to be replaced.

    Explanation 5: The charge cycle is interrupted in step 4.
    Test: Test to restart the charge cycle, if it still fails in step 4 the battery is can’t be charged and needs to be replaced.

  • MXTS 70/50: is lit

    This indication always has an explanation in the Ah & info display.

    E01: Reverse polarity.
    Test: Make sure that the + cable/clamp is connected to the + terminal and the - cable/clamp is connected to the - terminal.

    E02: Over voltage. The battery connected has a higher voltage than the selected charge program.
    Test: Make sure that the battery and the selected charge program corresponds to each other.

    E03: Time out step 1: Desulphation. The battery is sulphated and can´t be charged correct.
    Test: Try to restart the charge cycle, if it still fails in step 1 the battery is sulphated and needs to be replaced.

    E04: Time out step 2. Soft start. The battery can´t be charged correct.
    Test: Try to restart the charge cycle, if it still fails in step 1 the battery is sulphated and needs to be replaced.

    E05: Analyze. The charger can´t keep the charge.
    Test: Remove all parallel loads on the battery and restart the charge cycle. If the analyze fails again the battery needs to be replaced.

    E06: battery overheated. The charger has detected a too warm battery, over + 60 °C. Push Pause/Start to resume charging when temperature is below.
    Test: Make sure that it is not the ambient that is too warm. If that is not the case the battery need to be replaced.

    E07: Low battery voltage in supply program. The battery connected has too low voltage to continue. The battery connected is either a 12V and the charger is in 24V mode or the parallel loads are too high.
    Test: If a 12V battery is connected check if the unit is in 24V mode. Try to remove all parallel loads.

    E08: Over current in supply. The charger has switched off the output due to too high current.
    Test: Make sure that the clamps not are shortened. Also check if there are massive parallel loads on the battery.

    E99: Over voltage protection. If battery voltage is below 17V the ERROR LED is lit when 24V mode has been selected.
    Press the START/STOP button to proceed with in 12V mode. To change to 24V mode press INCREASE or DECREASE.

  • MXS 25, M25, PRO25S, PRO25SE, MXT 14, MXS 7000, PRO15S, M100, M300, MXS 25EC, ZAFIR 100, M200, M15, MXS 7.0: is lit and then turns into error mode

    The analysis phase is testing if the battery can retain the charger given.

    Explanation 1: Large loads are connected to the battery and are draining the voltage.
    Test: Disconnect the battery and try charging again.

    Explanation 2: The battery cannot retain the charge given.
    Test: The battery needs replacing.

  • MXT 4.0: is lit and then turns into error mode

    The analysis phase is testing if the battery can retain the charger given.

    Explanation 1: Large loads are connected to the battery and draining the voltage.
    Test: Disconnect the battery and try charging again.

    Explanation 2: The battery cannot retain the charger given.
    Test: The battery needs replacing.

  • MXS 7000, M100, ZAFIR 100, MXS 7.0: is flashing for 4 hours, then turns into error mode

    Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.

  • MXT 4.0, MXT 14: is flashing, then turns

    Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.