CTEK XS 0.8 User manual

Trouble Shooting Guide 1
XS 0.8
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the
charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
• 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 the top row on is indicating charging status.
Explanation: The battery voltage could be under 2±0.5V.
Test: Test the charger on a fresh battery.
• is flashing
If no battery or if the battery voltage is too low the led will start to flash to
indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
• 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.

Trouble Shooting Guide 2
XC 0.8
• 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.
• No LED is lit when the charger is connected only to the power outlet
Explanation: The charger has to be connected to battery for the LED’s to light
up.
• No LED is lit when the charger is connected to both the power outlet and the
battery
Explanation: The battery voltage could be under 4V.
Test: Test against another battery that is fresh.
• The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.
Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging is
completed. If the voltage is under 7V the battery is probably faulty.
Test: Try the charger on another fresh battery.
• 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, Comfort 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.
• 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.
• The error LED is lit

Trouble Shooting Guide 3
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the
– cable/clamp is connected to the – terminal.
XS 800
• 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.
• No LED is lit when the charger is connected only to the power outlet
Explanation: The charger has to be connected to battery for the LED’s to light
up.
• No LED is lit when the charger is connected to both the power outlet and the
battery
Explanation: The battery voltage could be under 6V.
Test: Test against another battery that is fresh.
• The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.
Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging should
be finished. If the voltage is under 7V the battery is most likely faulty.
Test: Try the charger on another fresh battery.
• 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, Comfort 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.
• 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.
• The error LED is lit

Trouble Shooting Guide 4
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the
– cable/clamp is connected to the – terminal.
MXS 3.6, MULTI XS 3600, Zafir 45, M45
• No LED is lit when the charger is connected only to the battery
Explanation: The charger requires voltage from the battery for the Standby
LED to be lit.
Test: Connect the charger to a fresh battery.
• 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.
Test: Make sure that there is power from the power outlet.
• No LED is lit when the charger is connected to both the power outlet and the
battery
Explanation: The battery voltage could be under 2±0.5V.
Test: Test against another battery that is fresh.
• The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.
Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging should
be completed. If the voltage is under 14,1V the battery is most likely faulty.
Test: Try the charger on another fresh battery.
• 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, Comfort 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.
• switches to after the charge has been stopped
Explanation: When the charger restarts the battery voltage is monitored. If the
voltage is above 12,9V, the charging will not commence. When the battery is
between 12,9V and 14,4V it is seen as fully charged. The charging will
automatically start again when the battery voltage drops below 12,9V.

Trouble Shooting Guide 5
• The charger goes into Standby mode after the power is cut and the charging
does not start again
Explanation: The charger will turn into Standby if the voltage in the battery is
below 6V when the power is back on.
Test: Start the charging again by pressing on the mode button.
• The error LED is lit
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the
– cable/clamp is connected to the – terminal.

Trouble Shooting Guide 6
MXS 5.0, MXS 5.0 CHECK, MXS 5.0 Polar, MXS 4003
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the
charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
• 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 the top row on is indicating charging status.
Explanation: The battery voltage could be under 2±0.5V.
Test: Test the charger on a fresh battery.
• is flashing
If no battery or if the battery voltage is too low the led will start to flash to
indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
• 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 with the mode button, 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 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step
2 the battery is can’t be charged and needs to be replaced.

Trouble Shooting Guide 7
Explanation 6: The charge cycle is interrupted in step 5.
Explanation 6.1: Large loads are connected to the battery and drain the
voltage.
Test: Disconnect the loads and try charging again.
Explanation 6.2: The battery cannot retain the charge provided.

Trouble Shooting Guide 8
MXS 7.0, MULTI XS 7000, Zafir 100, M100
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• 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.
Test: Make sure that there is power from the power outlet.
• 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 lowest row are lit and you can change charging mode. None
of the LED’s the top row on is indicating charging status.
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.
• is lit for 4 hours and then turns into error mode
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 for Multi XS 7000 (225Ah).
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.
• 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.
• is lit and then turns into error mode

Trouble Shooting Guide 9
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.
• The error LED 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: The clamps are short circuited.
Explanation 3: For chargers of the older type the error mode is flashing when
only the plug is connected.

Trouble Shooting Guide 10
MXT 4.0, MULTI XT 4000
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• 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.
Test: Make sure that there is power from the power outlet.
• 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 lowest row are lit and you can change charging mode. None
of the LED’s the top row on is indicating charging status.
Explanation: The battery voltage could be under 2±0.5V.
Test: Test the charger on a fresh battery.
• is lit for 4 hours and then turns into error mode
If the battery voltage is not above 25,5V after 4h the charger will turn into error
mode, because the voltage has not increased the way it should have done.
Explanation 1: The battery is too large in relation to the charger capacity.
Test: Make sure that the battery/batteries are not larger than the
recommendations for Multi XT 4000 (100Ah).
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 charging, 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 a defective cell in the battery.
Test: Change the battery.
• is flashing, then turns
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.
Explanation 1: Large loads are connected to the battery and draining the

Trouble Shooting Guide 11
voltage.
Test: Disconnect the battery and try charging again.
Explanation 2: The battery cannot retain the charger given.
Test: The battery needs replacing.
• The error LED 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: The clamps are short circuited.
Explanation 3: Loads are connected to the battery which requires more power
than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Trouble Shooting Guide 12
MXS 10
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the
charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
• 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 the top row on is indicating charging status.
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.
• is flashing
If no battery or if the battery voltage is too low the led will start to flash to
indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
• 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 with the mode button, if it still fails in step
1 the battery is sulphated and needs to be replaced.

Trouble Shooting Guide 13
Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step
2 the battery is can’t be charged and needs to be replaced.
Explanation 6: The charge cycle is interrupted in step 5.
Explanation 6.1: Large loads are connected to the battery and drain the
voltage.
Test: Disconnect the loads and try charging again.
Explanation 6.2: The battery cannot retain the charge provided.
• Temperature LED is lit
Explanation: This led is turned on automatically when the temp sensor is
connected.
• Temperature LED is not lit
Explanation: The temperature sensor is disconnected or has been damaged.
The charger will assume room temperature and charge without temperature
compensation.
• Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The current is reduced until
the temperature has dropped below + 65 °C. The charger reverts to normal
charging current when the temperature drops below + 65 °C.

Trouble Shooting Guide 14
MXS 25, MULTI XS 25000
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• 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.
Test: Make sure that there is power from the power outlet.
• 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. If the
LED’s in the top row are not lit, the charging status is not being indicated.
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.
• is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error
mode, because the voltage has not increased the way it should have done.
Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the
recommendations for MXS 25 and Multi XS 25000 (500Ah).
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 charging, 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 a faulty cell in the battery.
Test: Change the battery.
• 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

Trouble Shooting Guide 15
The analysis phase is testing if the battery can retain the charge given.
Explanation 1: Large loads are connected to the battery and drain 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 error LED 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 clamps are short circuited in Supply mode.
Test: Separate the clamps.
• Temperature LED is lit
Explanation Multi XS 25000: DC interruption or short circuit in the cable.
Explanation MXS 25: This is normal, the LED is on indicating that the
temperature sensor is activated. If the LED is turned off here is a DC
interruption or short circuit in the cable.
• Temperature LED is flashing
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.

Trouble Shooting Guide 16
M200, M300
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• 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.
Test: Make sure that there is power from the power outlet.
• 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 on is indicating charging status.
Explanation: The battery voltage could be under 2±0.5V.
Test: Test the charger on a fresh battery.
• is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error
mode, because the voltage has not increased the way it should have done.
Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the
recommendations for M200 and M300 (500Ah).
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 charging, 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 a faulty cell in the battery.
Test: Change the battery.
• 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 charge given.
Explanation 1: Large loads are connected to the battery and drain the voltage.

Trouble Shooting Guide 17
Test: Disconnect the battery and try charging again.
Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
• The error LED 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 clamps are short circuited in Supply mode.
Test: Separate the clamps.
• Temperature LED is lit
Please note that the function of temperature sensor has changed for
M200 and M300. The charger will indicate differently depending on when
it was purchased.
Explanation M200 and M300 purchased before 2011: DC interruption or
short circuit in the cable.
Explanation M200 and M300 purchased from 2012 and later: This is normal,
the LED is on indicating that the temperature sensor is activated. If the LED is
turned off here is a DC interruption or short circuit in the cable.
• Temperature LED is flashing
Explanation M200 and M300 purchased from 2012 and later: 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.

Trouble Shooting Guide 18
MXT 14, MULTI XT 14000
• No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
• No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the
charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
• 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 the top row on is indicating charging status.
Explanation: The battery voltage could be under 7V.
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.
• is lit for 4 hours and then turns into error mode
If the battery voltage is not above 25,5V after 4h the charger will go into error
mode, because the voltage has not increased the way it should have done.
Explanation 1: The battery is too large in relation to the capacity of the
chargers.
Test: Make sure that the battery/batteries are not larger than the
recommendations for XT 14000 / Multi XT 14000 (500Ah).
Test: Try to restart the charger because the charger might need some 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 charging, 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 a defective cell in the battery.
Test: Change the battery.
• is flashing, then turns
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

Trouble Shooting Guide 19
The analysis phase is testing if the battery can retain the charge given.
Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.
Explanation 2: The battery cannot retain the charge provided.
• The error LED 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.
• Temperature LED is lit
Explanation Multi XT 14000: DC interruption or short circuit in the cable.
Explanation MXT 14: This is normal, the LED is on indicating that the
temperature sensor is activated. If the LED is turned off here is a DC
interruption or short circuit in the cable.
• Temperature LED is flashing
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.

Trouble Shooting Guide 20
MXTS 70
• No LED or display is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s and the displays to
be lit.
• No LED or display is lit when the charger is connected only to the power outlet
Explanation: The displays and LED’s should light up when the charger is
connected to the power outlet. The fans should also turn on.
Test: Make sure that there is power from the power outlet.
• Is lit
Explanation: This led is lit when the charger has been set to a current less
than the maximum.
• Is lit
Explanation: This led is lit when the charging has been stopped or not started.
Press the START/PAUSE button to start or resume.
• 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.