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
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