DEFA WorkShopCharger Mode D'emploi page 4

DEFA WorkShopCharger 25A is based on modern switch-mode technology and galvanized divisions. This charger represent the latest
technology within battery charging and will give the batteries optimum life. It is well suited to battery sizes up to approx. 500Ah and
can maintenance charge the battery for an unlimited time. The charging voltage is temperature compensated with external sensor.
See Picture on page 2. The Picture shows the charge process in a graph with Voltage (V) and Current (I) over time (t)
The charger checks if the battery is correctly connected. The battery's charge level (V) and total capacity (Ah) is measured to
determine the correct settings for charging.
Battery Voltage
>12.65V
12.55V–12.65V
12.45V–12.55V
12.35V–12.45V
5.0V–12.35V
The charger starts charging the battery with constant current up to 14,4V/14,7V (at 25°C). The charge voltage is then held constant
at 14,4V/14,7V and the charging current is reduced until it is below a defined level. The charge voltage then drops to 13.6V, before
the long-term charging phase starts. During charging, battery charge is shown by the number of LEDs illuminated. The blinking
segment above these LEDs indicates active charging. Once full battery charge is reached, all 5 LED segments remain illuminated.
If the measured battery voltage is below 2V, the charger will enter Error Mode.
The charger analyses the battery again after the charging phase. If the charger detects an error in the battery, the warning triangle
will flash. Post analysis can detect batteries with a short circuit in individual cells. This cannot be detected in the pre analysis.
If the battery voltage drops below 12.0V within 2min, the charger will go into error mode. The charging sequence will be stopped.
After the battery is fully charged , the charger will deliver 13,6V@25°C with a maximum of 25A.
This is indicated by all battery LEDs slowly pulsating.
The charger automatically adjusts the charging voltage to the correct level according to the ambient temperature. The default
ambient temperature is 25°C. Voltage is reduced for higher ambient temperatures and increased for lower ambient temperatures.
The correct amount is ±0.03V/°C. Max temperature compensate charging voltage is 15.3 V.
Some batteries require a higher charging voltage than other batteries. If the 14.7V button is activated the initial charging voltage will
be 0.3V higher than the standard level. Before activating this button, the 14.7V charge voltage requirement should be confirmed.
If a battery requires this higher charge voltage, it will be described on the battery.
When the charger is turned off the button can be pressed until the LED shines one by one in a regular bottom to the top cycle.
The charger will be in power supply mode regardless of the battery voltage after it has been turned on, so it can be used to change
the battery of the car without loosing car settings/data. In this mode, the charger supply 13.7V and max 25 Amp. If the output short
circuit in this mode, the charger will go into error mode. You should press the power button to turn off the charger, correct the problem,
then restart the charger (go to charger or power supply mode).
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ABOUT THE CHARGER
CHARGE PROCESS
PREANALYSIS
Battery Status
95–100%
80%
60%
40%
0-20%
CHARGING
POST ANALYSIS
LONG-TERM CHARGING
TEMPERATURE BASED VOLTAGE COMPENSATION
14.7V BUTTON
POWER SUPPLY MODE
LED Indication
All segments on
4 segments on
3 segments on
2 segments on
1 segment on