Checking the battery

When the charger is connected to the battery, the battery condition is checked first.
Is the battery connected correctly? (Positive to positive / minus to minus)
Does the battery have short-circuited cells?
Is the battery deeply discharged, heavily sulphated, but not damaged?
Is the battery already fully charged?

Tystor battery charger measures the battery voltage at start.
If voltage exceeds 12.8V (for a 12V battery), the battery is fully charged and the charger does not start a new recharge.
Instead, the charger goes directly to the maintenance charge to avoid stressing the fully charged battery.
Read more below the maintenance charge below.

If the battery is incorrectly connected (charger’s positive cable connected to the battery negative pole, etc.), the charger does not start.
Instead, the charger alert with a red light. Adjust the connections and restart.

If the voltage is between 0 – 10V, the charger must test the battery to determine if the battery is possible to recharge.
At very low voltages, the charger deliver a test current and waits for the battery voltage to rise above control level 1 (K1) within a specified time.

If K1 is not passed within the test time, the charger interrupts the attempts and alarms with red indication that the battery has short-circuited cells.
A battery with short-circuited cells will produce a highly explosive gas from the undamaged cells during a charging attempt. The battery is beyond rescue and should be discarded.

If K1 is passed within the time period, the next test starts with a higher charging current.
Within the prescribed time, the 10V limit must now be passed.

If the 10V limit is not exceeded within the test time, the charger interrupts the attempts and alarms as above.
The battery is beyond rescue and should be discarded.

Passing the 10V limit in time starts the main charge.