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.
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.
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.