CS ONE | USER MANUAL | 9© CTEK SWEDEN AB WWW.CTEK.COM
EN
TROUBLESHOOTING & FAQ
QUESTION ANSWER ACTION
What does it mean when all LED
segments are pulsing slowly with a
white colour?
This means the battery is fully charged and the CS ONE has gone into
maintenance 'CARE' mode.
The battery can now be used.
In 'CARE' mode the battery is safe to be left on charge for long term storage on or off the vehicle.
The CTEK APP cannot nd the CS
ONE, the status is shown as being
ofine, why?
Connection between the CS ONE and the mobile device is faulty.
Check that Bluetooth® is active on the mobile device.
Check that the mobile device and the CS ONE are within the receiving range of the Bluetooth®.
Trying to 'WAKE UP' the CS ONE via
the CTEK app, but the battery doesn't
start, why?.
This indicates that there is either a faulty connection to the battery or the
battery being charged is faulty.
Disconnect the battery from the vehicle or from the load → run wake up procedure again.
If it still does not work, the battery might be broken or has closed down (LiFePO4).
CTEK recommend to get the battery tested - it may need replacing.
Cannot choose the 'WAKE UP'
function on the app, why is it missing?
'WAKE UP' is only available when the CS ONE cannot nd the battery.
Open the app and start the CS ONE - but doesn't connect the charger to the battery (or to recommended
charge points) it will show up on the app directly.
How does the 'SUPPLY' function work
in the CTEK APP?
In 'SUPPLY' the CS ONE works as a supply unit, giving out a constant
voltage of 13,6 volt and as much current as required (max 8 ampere).
There is also an output power limit of 100 watt.
No action required.
I have used the 'SUPPLY' function
from the CTEK APP but it will not go
back to charging, why?
The charging mode will need to be changed via the CTEK APP.
After using the 'SUPPLY' function from the CTEK APP, choose the operation 'RESET TO 'APTO' to make the
battery charge again.
How does the 'RECOND' function
work in the CTEK APP?
The 'RECOND' function should only be used on wet lead acid batteries
(Not Lithium LiFePO4, GEL or AGM batteries).
In 'RECOND' the CS ONE will rstly go through all of the charging steps
until the battery is fully charged. The voltage is then raised in a controlled
way to prevent acid stratication and prolong battery life.
'RECOND' should only be used 1-2 times per year.
No action required
What type of batteries can CS ONE charge? The CS ONE charges all types of 12 V batteries from 3Ah up to 180Ah. See 'TECHNICAL SPECIFICATION' for further information.
Does the CS ONE work with other CTEK Accessories?
The optional CS CONNECT ADAPTER CABLE will be required to make
the CS ONE compatible with the CTEK accessories.
See 'ACCESSORIES: CS ONE' for further information.
Do I need to register my charger to have the 5 year warranty
time?
No.
Should any issues arise, please contact you supplier. If the supplier is unable to help, please contact CTEK
directly.