Error mode
This battery charger is protected against short circuit and wrong polarity connection to the battery. In case of
short circuit the charge process will not begin. If a battery is connected to the charger with wrong polarity, the
‘ERROR’ LED (7) will light and the charge process will not be begin.
Contents supplied
1 x battery charger
1x operating instructions
Disclaimer
Information in these operating instructions can be changed without prior notice.
ANSMANN ENERGY cannot accept liability for direct, indirect, accidental or other claims or consequential
damages originated by using this charger and information given in these operating instructions.
ANSMANN AG
Industriestrasse 10
D-97959 Assamstadt / Germany
e-Mail: hotline@ansmann.de
Internet: http://www.ansmann.de
Technical details subject to change without prior notice. No liability accepted for typographical errors or
omissions. 09/2008 Rev. 1.0
Operating instructions
ALCT 12-4 Pro
The ANSMANN® ALCT12-4 PRO is a microcontroller based battery charger to charge 12V Lead Acid
rechargeable batteries. It comes with IP65 housing and so its electronics is protected against dust and
moisture.
These operating instructions will help you to use the ALCT12-4 PRO battery charger. So please read it
carefully before use.
ANSMANN AG
Safety Measures and Precautions
! Read the operating instructions carefully before use
! Charge only Lead Acid batteries. DO NOT charge primary cells, NiMh, NiCd, LiIon or LiPolymer batteries Risk of Explosion and chemical danger
! Check the battery manufacturer’s instructions. Do not charge batteries with too high charge current. - Risk
of Explosion and chemical danger
! Connect the charger to a suitable mains supply only.
! Connect the charger to the battery with correct polarity.
! Do not charge hot batteries. Batteries must be at ambient temperature before charging.
! Not recommended for use in rain or hot conditions.
! Do not leave the charger unattended during operation.
! Do not open equipment or carry out repairs. Authorized personnel may only carry out repairs.
! Do not cover equipment or obstruct ventilation, otherwise it may over-heat. Do not expose to direct sunlight.
! Keep batteries, battery charger and cables away from combustible materials.
! Avoid sparking as there maybe gases present from the batteries.
! Never place the charger inside the engine compartment. Keep leads away from moving parts.
Technical data
ALCT12-4 Pro
Input voltage: 220-240 V 50/60 Hz
Battery Type: 12V Lead Acid rechargeable batteries with capacity
Output at charge mode 1 14.4V/0.8A
Output at charge mode 2 14.4V/4A max.
Output at charge mode 3 14.7V/4A max.
Housing protection IP65, protected against dust and moisture
Output protection against short circuit and wrong polarity
Dimensions L x W x H in mm: 184 x 62 x 43,5mm
ANSMANN® part no. 9294058/xx
from 1,2Ah-120Ah
Connectors
1. Mains cable with Euro plug
To connect the charger to a 230V mains socket
2. Output plugs (crocodile clips)
Red = Positive, Black = Negative - to connect the battery
The crocodile clips can also be removed from the charge cable. With the o-ring-connectors the charge
cable can be fixed to the battery with screws as well.
4
1
3 2
LED-indicators
1. LED ‘Standby’
- lights when charger is connected to the mains and in stand by mode
- switches off during charge process
2. LED ‘<14Ah’
- charge indicator for charge mode 1 (14.4V/0.8A), lights during the charge process and stays lit after charge
end
3. LED ‘>14Ah’
- charge indicator for charge mode 2 (14.4V/4A max), lights during the charge process and stays lit after
charge end
4. LED ‘cold’
- charge indicator for charge mode 3 (14.7V/4A max), lights during the charge process and stays lit after
charge end
5. LED- ‘Charge’
- charge indicator, lights during charge process and switches off after charge end
6. LED- ‘Full’
- charge end indicator, lights when battery is fully charged
7. LED ‘ ! ’
- lights in cases of wrong polarity
5
6
7
Product Description
The ANSMANN® ALCT12-4 PRO battery charger is suitable to charge 12V rechargeable Lead Acid batteries
with a capacity of
1,2Ah - 120Ah. The output is protected against short circuit and wrong polarity.
Operation
- Please choose an appropriate area to charge the battery.
- Connect the charger to a 230V 50Hz mains socket.
- Stand by LED (1) lights
- Connect the output clips to the battery (red clip to Positive) before selecting the charge mode. If no
battery is connected the charger will remain in ‘STANDBY’ by mode.
- To select the desired charge mode, as described below, press the ‘MODE’ button several times.
The charger will begin the selected charging process immediately. The related charge mode LED
(2-4) and the ‘CHARGE’ LED (5) will illuminate.
- You can change the charge mode at any time by pressing the ‘MODE’ button again and selecting
another charge mode.
- The charge process can be stopped at any time by pressing the ‘MODE’ button several times until
the ‘STANDBY’ LED (1) is lit.
Charge mode 1 (14.4V/0.8A)
Please select this charge mode if the capacity of the battery to be charged is below 14Ah. The battery will be
charged with a maximum charge current of 800mA. During the charge process LED’s 2 and 5 will light.
Charging time depends on the battery capacity. The battery will be charged to a charge end voltage of 14.4V.
After charge end, the ‘CHARGE’ LED (5) will switch off and the ‘FULL’ LED (6) will switch on. The charger
automatically switches to a trickle charge mode and will restart charging with a max. charge current of 800mA
if the battery is discharged by a load.
Charge mode 2 (14.4V/4A max.)
Please select this charge mode if the capacity of the battery to be charged is higher than14Ah. The battery will
be charged with a maximum charge current of 4A. During the charge process LED’s 3 and 5 will light.
Charging time depends on the battery capacity. The battery will be charged to a charge end voltage of 14.4V.
After charge end the ‘CHARGE’ LED (5) will switch off and the ‘FULL’ LED (6) will switch on. The charger
automatically switches to a trickle charge mode and will restart charging with a max. charge current of 800mA
if the battery discharged by a load.
Charge mode 3 (14.7V/4A max.)
Please select this charge mode if the capacity of the battery to be charged is higher than 14Ah and if the
battery is to be charged in cold ambient conditions (below 0°C). The battery will be charged with a maximum
charge current of 4A. During the charge process LED’s 4 and 5 will light. Charging time depends on the
battery capacity. The battery will be charged to a charge end voltage of 14.7V. After charge end the
‘CHARGE’ LED (5) will switch off and the ‘FULL’ LED (6) will switch on. The charger automatically switches to
a trickle charge mode and will restart charging with a max. charge current of 800mA if the battery discharged
by a load.
Recharging of deeply discharged batteries
If a deeply discharged battery with less than 10.5V is connected to the charger, after selecting the charge
mode, the battery will be charged with a reduced and pulsed charge current. Once the battery voltage reaches
more than 10.5V the charge process continues with the normal charge process. This rescue program for dead
batteries work automatically if a dead battery is detected. There is no special LED-indication for this.
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