No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.
The error LED is lit
Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
Explanation 1: Reverse polarity.
Can you charge a lead acid battery with the Lithium mode?
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.
Explanation 2: The clamps are short circuited.
Explanation 3: For chargers of the older type the error mode is flashing when only the plug is connected.
We would not recommend that you do. Our ‘Lithium’ mode has been specially developed to work with lithium (LFP / LiFePO4) battery chemistries – this mode will not fully charge a lead acid battery.
I have charged my lead acid battery with lithium have I ruined the battery.
The battery will not be ruined but it will not be fully charged.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Can I use lithium for lead acid and vice versa?
Test: Make sure that there is power from the power outlet.
No - CTEK recommend the correct charge mode be used at all times.
The charger has gone into maintenance mode but cannot see that the recond is completed?
The Recond program starts with the normal charging program but has a recondition phase inserted after the charging, automatically followed by the maintenance mode. The Recond light “R” on the upper row may be tricky to see, as it will be lit after the third charging lamp, and turns off after the recondition is done, (lasts 0,5h – 4h) and after that the 4th, green maintenance light will be lit.
is flashing, 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.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charger given.
Is there a temp sensor? How does it act?
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.
The temp sensor is within the charger and automatically adjusts charge voltage for optimum charge in any condition.
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED to be lit.