CTEK PRO25S User manual

EN • 5
MANUAL
CONGRATULATIONS
on the purchase of your new professional switch mode battery charger. This charger is
included in a series of professional chargers from CTEK SWEDEN AB and represents the
latest technology in battery charging.
MODE
RECONDSUPPLYNORMAL LITHIUM
PRO25S
LITHIUM
PROGRAM
ERROR
LAMP
RECOND
PROGRAM
SUPPLY
PROGRAM
NORMAL
BATTERY
PROGRAM
HOW TO CHARGE
1. Connect the charger to the battery.
2. Connect the charger to the wall socket. The power lamp will indicate that the mains
cable is connected to the wall socket. The error lamp will indicate if the battery clamps
are incorrectly connected. The reverse polarity protection will ensure that the battery or
charger will not be damaged.
3. Press the MODE-button to select charging program.
4. Follow the indication lamps through the charging process.
The battery is ready to start the engine when is lit.
The battery is fully charged when is lit.
5. Stop charging at any time by disconnecting the mains cable from the wall socket.
MODE-
BUTTON
POWER
LAMP
For batteries mounted inside a vehicle
1. Connect the charger according to the
vehicles manual.
2. Connect the charger to the wall socket.
3. Disconnect the charger from the wall socket
before disconnecting the battery.
4. Disconnect the black clamp before the red
clamp.
1 2
Read safety instruction
READY TO USE
EMPTY
CHARGING
FULLY CHARGED
+
–
Temperature sensor
The temperature sensor works automatically
and will adjust the voltage to the ambient
temperature. Place the temperature sensor
in the positive clamp or as the close to the
battery as possible.

6 • EN
CHARGING PROGRAMS
Settings are made by pressing the MODE-button. After about two seconds the charger
activates the selected program. The selected program will be restarted next time the
charger is connected.
The table explains the different Charging Programs:
Program Explanation
NORMAL Normal battery program 14.4V/25A. Only for lead-acid
batteries.
RECOND
Recond program 15.8V/1.5A
Use Recond to return energy to empty WET and Ca/Ca batteries.
Recond your battery once per year and after deep dischare to maximise
lifetime and capacity. The Recond program adds the Recond step to the
normal battery program. Only for lead-acid batteries.
SUPPLY
Supply program 13.6V/25A
Use as a 12V power supply or use for float maintenance charging when
100% capacity of the battery is required. The Supply program activates
the Float step without time or voltage limitation. The spark protection
on the battery charger is disabled during the SUPPLY program.
BATTERY SIZE (Ah) TIME TO 80% CHARGED
40Ah 1.5h
100Ah 3h
200Ah 6h
300Ah 16h
READY TO USE
The table shows the estimated time to charge a battery from empty to 80%
ERROR LAMP
If the error lamp is lit, check the following:
MODE
RECONDSUPPLYNORMAL LITHIUM
PRO25S
1. Is the chargers red clamp connected to the battery's
positive pole? Connect the charger according to the
vehicles manual.
2. Is the charger connected to a 12V battery?
3. Are the clamps short circuited?
4. Has charging been interrupted in or ?
Restart the charger by pressing the MODE-button. If charging is still
being interrupted, the battery...
...is seriosly sulphated and may need to be replaced.
...can not accept charge and may need to be replaced.
...can not keep charge and may need to be replaced.
POWER LAMP
If the power lamp is lit with a:
MODE
RECONDSUPPLYNORMAL LITHIUM
PRO25S
1. STEADY LIGHT
The mains cable is connected to the wall socket.
2. FLASHING LIGHT:
The charger has entered the energy save mode. This happens if the
charger isn´t connected to the battery within 2 minutes or the battery
voltage is below 2V.
LEAD-ACID

EN • 7
STEP 1 DESULPHATION
Detects sulphated batteries. Pulsing current and voltage, removes sulphate from the lead plates
of the battery restoring the battery capacity.
STEP 2 SOFT START
Tests if the battery can accept charge. This step prevents that charging proceeds with a defect
battery.
STEP 3 BULK
Charging with maximum current until approximately 80% battery capacity.
STEP 4 ABSORPTION
Charging with declining current to maximize up to 100% battery capacity.
STEP 5 ANALYSE
Tests if the battery can hold charge. Batteries that can not hold charge may need to be
replaced.
STEP 6 RECOND
Choose the Recond program to add the Recond step to the charging process. During the
Recond step voltage increases to create controlled gassing in the battery. Gassing mixes the
battery acid and gives back energy to the battery.
STEP 7 FLOAT
Maintaining the battery voltage at maximum level by providing a constant voltage charge.
STEP 8 PULSE
Maintaining the battery at 95–100% capacity. The charger monitors the battery voltage and
gives a pulse when necessary to keep the battery fully charged.
LEAD-ACID
12345678
NORMAL 15.8V Max 25A until 12.6V Increasing voltage to
14.4V, max 25A Declining current 14.4V Checks if voltage drops to 12V 13.6V
max 25A 12.9V–14.4V
20–1.2A
RECOND 15.8V Max 25A until 12.6V Increasing voltage to
14.4V, max 25A Declining current 14.4V Checks if voltage drops to 12V Max 15.8V Max 1.5A 13.6V
max 25A 12.9V–14.4V
20–1.2A
Time limit: 8h 20h 16h 3 minutes 2h or 6h 10days charge cycle restarts if
voltage drops
Charge cycle restarts
if voltage drops

8 • EN
CHARGING PROGRAMS
Settings are made by pressing the MODE-button. After about two seconds the charger
activates the selected program. The selected program will be restarted next time the
charger is connected.
The table explains the different Charging Programs:
Program Explanation Temp range
LITHIUM Lithium program 13.8V/25A
Only for Lithium batteries
(Li-FePO4, Li-Fe, Li-iron, LFP).
0°C–+40°C
(32ºF–104ºF)
Read the battery manual
for charging outside this
temperature range.
SUPPLY
Supply program 13.6V/25A
Use as a 12V power supply or use for float maintenance charging when
100% capacity of the battery is required. The Supply program activates
the Float step without time or voltage limitation. The spark protection
on the battery charger is disabled during the SUPPLY program.
ERROR LAMP
If the error lamp is lit, check the following:
MODE
RECONDSUPPLYNORMAL LITHIUM
PRO25S
1. Is the chargers red clamp connected to the battery's
positive pole? Connect the charger according to the
vehicles manual.
2. Is the charger connected to a 12V battery?
3. Are the clamps short circuited?
4. Has charging been interrupted in or ?
Restart the charger by pressing the MODE-button. If charging is still
being interrupted, the battery...
...can not accept charge or paralell loads may be connected to
the battery. Remove the paralell loads and restart the charging by
pressing the MODE-button.
...restart the charger maximum 3 times. If the charger doesn´t
continue to Bulk after that, the battery may need to be replaced.
...can not keep charge and may need to be replaced.
POWER LAMP
If the power lamp is lit with a:
MODE
RECONDSUPPLYNORMAL LITHIUM
PRO25S
1. STEADY LIGHT
The mains cable is connected to the wall socket.
2. FLASHING LIGHT:
The charger has entered the energy save mode. This happens if the
charger isn´t connected to the battery within 2 minutes.
LITHIUM
BATTERIES WITH "UNDER VOLTAGE PROTECTION"
Some Lithium batteries have an on-board UVP (under voltage protection) that
disconnects the battery to avoid it becoming too deeply discharged. This prohibits the
charger from detecting that there’s a battery connected. To bypass this, the battery
charger needs to open the UVP. There are two options available to “wake up” the
battery - automatic and manual.
During the automatic “wake up” period the LED will flash until the charge program
is started and LED is lit with a steady light. Automatic "wake up" will be active for
maximum 5 minutes.
If the charger is in Standby mode after 10 minutes ( power led is flashing) the
automatic wake up did not succeed. Try the manual wake up.
To use the manual “wake up”, press the Mode button for approximately 10 seconds
to bypass the UVP. During the “wake up” period the LED will flash until the charge
program is started and the LED is lit with a steady light. If the manual wake up is
unsuccessful the power LED will start to flash after latest 10 minutes. Disconnect any
parallel loads from the battery and try again. If the charging does not start after that, the
battery may need to be replaced.

EN • 9
LITHIUM
Wake up 12345678
LITHIUM 13.0V Max 25A Max 25A until 13.8V Declining current
13.8V Checks if voltage drops to 12.0V Max 3A 14.4V 13.3V Max 25A 13.0V–13.8V 25A–3.0A
Time limit: Max 10 minutes Max 30h Max 4h 3 minutes If start charge voltage less than 13.9V
then max 2h
10days
Charge cycle
restarts if voltage
drops
Max 1h pulse
Auto pulse
10 days
STEP 1 ACCEPT
Tests if the battery can accept charge. This step prevents that charging proceeds with a
defect battery.
STEP 2 BULK
Charging with maximum current until approximately 90% battery capacity.
STEP 3 ABSORPTION
Charging with declining current to maximize up to 95% battery capacity.
STEP 4 ANALYSE
Tests if the battery can hold charge. Batteries that can not hold charge may need to be
replaced.
STEP 5 COMPLETION
Final charge with reduced current.
STEP 6 MAXIMIZATION
Final charge with maximum voltage up to 100% battery capacity.
STEP 7 FLOAT
Maintaining the battery voltage at maximum level by providing a constant voltage charge.
STEP 8 PULSE
Maintaining the battery at 95–100% capacity. The charger monitors the battery voltage and
gives a pulse when necessary to keep the battery fully charged.
BATTERY SIZE (Ah) TIME TO 80% CHARGED
40Ah 1.5h
100Ah 3h
200Ah 6h
300Ah 16h
READY TO USE
The table shows the estimated time to charge a battery from empty to 80%

10 • EN
TECHNICAL SPECIFICATIONS
Model number 1093
INPUT 220–240VAC, 50–60Hz, max 2.9A
OUTPUT 25A, 12V
Start voltage 2.0V Lead Acid batteries
8.0V Lithium batteries
Back current drain* Less than 2.3Ah/month
Ripple** Less than 4%
Ambient
temperature -20°C to +50°C (-4°F to +122°F)
Battery types All types of 12V Lead Acid batteries (WET, EFB, Ca/Ca, AGM
and GEL). 12V (4cells) Lithium batteries (Li-FePO4, Li-Fe, Li-iron,
LFP)
Battery capacity 40–500Ah, Lead Acid battery types
30–450Ah, Lithium battery types
Insulation class IP44
Warranty 2 years
*) Back current drain is the current that drains the battery if the charger is not connected
to the mains. CTEK chargers have a very low back current.
**) The quality of the charging voltage and charging current is very important. A high
current ripple heats up the battery which has an aging effect on the positive electrode.
High voltage ripple could harm other equipment that is connected to the battery. CTEK
battery chargers produce very clean voltage and current with low ripple.
LIMITED WARRANTY
CTEK, issues this limited warranty to the original purchaser of this product. This limited
warranty is not transferable. The warranty applies to manufacturing faults and material
defects. The customer must return the product together with the receipt of purchase to
the point of purchase. This warranty is void if the product has been opened, handled
carelessly or repaired by anyone other than CTEK or its authorised representatives. One
of the screw holes in the bottom of the product may be sealed. Removing or damaging
the seal will void the warranty. CTEK makes no warranty other than this limited
warranty and is not liable for any other costs other than those mentioned above, i.e. no
consequential damages. Moreover, CTEK is not obligated to any other warranty other
than this warranty.
SUPPORT
For support, FAQ, latest revised manual and more information about CTEK products:
www.ctek.com.
50017836B