D. Normal Multi-Stage (IUoU) Charging Operation
The 7-stage IU0U charge algorithm ensures fast, complete and at the same time gentle charging of the lead acid battery.
Charging Profile
Stage 1.
DESULPHATION charge - The pulse charging
If the initial battery voltage is less than 9V, the charger will start Desulphation mode with pulse charge profile. The
desulphation curve (DES) will display with slow flashing.
Stage 2.
SOFT START - The constant current charging
If at the initial bulk charging, the battery voltage is still less than 11V due to deep discharge, the charger will go with soft
charge. The soft start curve (SST) will display with slow flashing. The bulk charging current is reduced to half of the
maximum current until battery voltage rises over the set limit 11V at which point the charger switches to Bulk charge.
In case the battery voltage cannot pass the voltage limit within 2 hours, the charger switches to fault mode and
discontinues the charging.
Stage 3.
BULK CHARGE - The constant current charging
Normally the battery is charged at constant maximum current until it rises to the selected Absorption voltage level.
The charging voltage changes with the battery voltage. The Bulk curve (BUL) will display with slow flashing.
If the charger cannot go to Absorption mode within 20 hours, the charger will automatically goes to Float mode so to
prevent over charge the battery. This is call safety timer
Stage 4.
ABSORPTION CHARGE - The constant voltage charging
Battery Type Selection: Wet: 14.4V, AGM: 14.3V, Gel: 14.1V, Calcium: 15.1V
When the battery voltage rises to the selected Absorption voltage level, the charging will switch to Constant voltage
charging. The Absorption curve (ABS) will display with slow flashing. Absorption charging current will decrease gradually
to a set value at which the charger automatically switches to Float Stage.
The max. absorption time is also controlled by the time in Bulk charge and battery type selected.
Remark: There is no charging at the end of Absorption charge.
This is normal as the battery you connected is under analysis.
Stage 5.
RECONDITION CHARGE - The constant voltage charging
Only for WET battery and manual select, please refer to section E.
Stage 6.
FLOAT CHARGE - The constant voltage charging
In this stage, the battery is full and only takes in the amount of current necessary for maintaining the capacity. The float
voltage is preset by factory according to the type of battery. The Float curve (FLO) will display with slow flashing.
In case of the charger keeps at this mode with charging current less than 20% of bulk current for over 60 hours. The
charger will go into the Standby mode.
