CTEK M 45 User Manual

M45

Battery charger

For lead-acid batteries 1,2-120Ah

User’s Manual and a guide

to professional battery charging

For Starter/Deep Cycle batteries

INTRODUCTION

Congratulations on your purchase of your new professional M45 Switch Mode Charger with
Pulse Maintenance. M45 is a member of a family of professional chargers from CTEK Sweden
AB. It represents the state-of-the-art technology for battery charging. A M45 will prolong the
lifetime of your battery. Read this user manual and follow the instructions carefully before using
the charger.

SAFETY

• The charger is designed for lead-acid batteries from 1,2-120Ah. Do not use the charger for
any other purpose.

• Use safety glasses and turn your head away when connecting or disconnecting a battery.

• Battery acid is corosive. Rinse immediately with water if acid comes into contact with skin or
eyes. Seek medical advice.

• Make sure that the cable is not being pinched or in contact with warm surfaces or sharp
edges.

• While charging, a battery can emit explosive gases, so it is important to avoid sparks in the
immediate area.

• Always provide for proper ventilation during charging.

• Avoid covering the charger.

• Make sure that the electrical cable does not come into contact with water.

• Never charge a frozen battery.

• Never charge a damaged battery.

• Do not place the charger on the battery while charging.

• The electrical connection must fulfil the national heavy current requirements.

• Check the cabling in the charger before use. Make sure there are no cracks in the cabling or
in the protective covering. A charger with damaged cables may not be used.

• Always check that the charger has gone over to maintenance charging mode before leaving
the charger unattended and connected for long periods. If the charger had not gone over
to maintenance charging within 3 days, this is an indication of a problem. In this case the
charger must be disconnected manually.

• All batteries fail sooner or later. A battery that fails during charging is normally taken care of
by the chargers advanced control, but certain uncommon errors in the battery can still arise.
Don’t leave the battery charger unattended for a longer period of time.

• Only mount the charger on a flat surface.

• This equipment may not be used by children or by those who can not read and understand
the manual if they are not supervised by a responsible person who can guarantee that the
battery charger is being used in a safe manner. Store and use the battery charger out of the
reach of children. Make sure that children do not play with the battery charger.

BATTERY TYPES AND SETTINGS

M45 can easily be configured to charge many different types of 12V lead-acid batteries; wet
batteries, MF, AGM och for most GEL-batteries.
The following recommendations should, however, only be seen as guidelines. When in doubt,
always consult the battery manufacturer for further instructions.
Settings are made by pressing the “MODE-button” and stepping forward by pressing the button
one step at a time, releasing the button when the required mode is reached.

Mode 14.4V/0.8A

This mode is normally used for <14Ah batteries.

Mode 14.4V/3.6A

Normal setting for wet batteries, MF and for most GEL batteries.

Mode 14.7V/3.6A

This setting is recommended for batteries at temperatures
below 5°C. It is also recommended for many AGM batteries.
This setting is not recommended for maintenance charging
when the temperature at times exceeds +5°C. In this case, the

14.4V/3.6A mode is recommended.

CHARGING

Charging batteries mounted in a vehicle:

1. The power cord should be disconnected before connecting or disconnecting the battery
leads.

2. Identify the pole that is grounded (attached to the chassis). Ground is normally connected to
the negative terminal.

3. Charging a negatively grounded battery. Connect the red wire to the positive pole of the
battery and the black cable to the vehicle’s chassis. Be careful not to connect the black cable in
the vicinity of a fuel pipe or the battery.

4. Charging a positively grounded battery. Connect the black wire to the negative pole of the
battery and the red cable to the vehicle's chassis. Be careful not to connect the red cable in the
vicinity of a fuel pipe or the battery.

Charging of a battery not connected to a vehicle:

1. The power cord should be disconnected before connecting or disconnecting the battery
leads.

2. Connect the red wire to the positive pole of the battery and the black cable to the negative
pole.

Connecting the provided cables with eyelet terminals:

Make sure that the cable is not being pinched or in contact with warm surfaces or sharp edges.
When the cable is mounted on the battery, it should not be connected to the charger. Connect
the eyelet terminals to the battery's poles - the red cable to the positive pole and the black cable
to the negative pole. After this, the quick contact can be connected.

Reverse Polarity Protection

If the battery cables are connected incorrectly, the reverse polarity protection will make sure that
the charger and the battery are not damaged. In this case, the red warning lamp (0) will be lit.

Start charging

1. Set the proper charging mode for the battery by pushing the Mode button until the correct
setting is lit. Choosing settings for your battery is described under ”BATTERY TYPES AND
SETTINGS”.

2. When you are sure the battery leads are correctly placed, connect the power cord to the
power outlet to begin charging. If the battery leads are wrongly connected, the pole-changing
switch will ensure the battery and charger are not damaged. The fault indicator
which case start from the beginning again.

3. The charging lamp
that the battery is fully charged. If the voltage drops the charger sends a pulse to the battery.
The length of the pulse depends on how much the voltage has dropped. The charger can be
connected for months.

4. If nothing happens: If the voltage indicator is lit but no other lamp is lit there could be a bad
connection to the battery or chassis or the battery could be faulty. Check the wall power outlet.
If you experience problems: start with the sensitive connection between the battery clamps and
the charger.

5. Charging can be stopped at any time by disconnecting the supply cord or by setting the
charger on Standby. Always remove the power cord from the power outlet before disconnecting
the battery leads from a battery in a vehicle. When you stop charging a battery in a vehicle,
remove the cable from the chassis before removing the other cable.

6. If the charger lamp and the maintenance-charger lamp are ashing alternately, the reason
for this is due to:

• An interruption during charging, due to a loose connection or because the battery has
ceased to work.

• The battery has become sulphated. If the lamps ash for more than 30 minutes, this indica­tes that the battery is dead and needs to be replaced.

• If there is an interval of more than 10 seconds between the ashes, this indicates that the
battery has a high self-discharge rate and may need to be replaced.

will now indicate charging or the maintenance lamp will indicate

will light. In

CHARGING PHASES

M45 operates in a four step fully automatic cycle. It begins charging with an almost constant
current (0.8A or 3.6A) until maximum voltage (14.4V or 14.7V) is reached. The charger changes
mode at this point. It locks the voltage at maximum level and allows the current to drop. The
M45 switches automatically to pulse maintenance charging when the current drops to 0.4A.
The charging cycle restarts if the battery voltage drops to 12.9V.

Desulphation - Desulphation with pulsing for sulphated batteries.
Bulk - Charging where 80% of the energy is returned. The charger delivers an almost constant

current until the battery voltage reaches maximum level.
Absorption - Charging up to almost 100%. The charge current falls and the voltage is kept
constant at the maximum level.
Pulse - Maintenance phase, where the charger delivers a pulse if the battery voltage drops.
Charging varies between 95% and 100%. The battery receives a pulse when the voltage
reduces. Keep the battery in good condition when not in use. The charger can be connected
for months.

TEMPERATURE PROTECTION

M45 is protected from being overheated. The power will be reduced if the ambient temperature
is raised.

MAINTENANCE

The charger is maintenance free. Note that disassembly of the charger is not permitted and
will void the warranty. If the power cord is damaged, the charger must be left to the reseller for
maintenance. The case can be cleaned with a soft damp cloth and mild cleanser. The charger
should be disconnected from the power while cleaning.

EQUIPMENT

M45 is delivered with a set of battery leads with battery pole clamps and a set of battery leads
with eyelet terminals.

WARRANTY

CTEK SWEDEN AB, Rostugnsvägen 3, 776 70 VIKMANSHYTTAN, SWEDEN provides a lim­ited warranty to the original purchaser of this product. This limited warranty is not transferable.
The unit is warranted against defective workmanship or materials for 5 years from the date of
purchase. The customer must return the product together with the original purchase receipt to
the place of purchase. This warranty is void if the unit is handled carelessly, opened or repaired
by anyone other than CTEK SWEDEN AB or its authorized representative. CTEK SWEDEN
AB makes no warranty other than this limited warranty and expressly excludes any implied
warranty including any warranty for consequential damages. This is the only expressed limited
warranty and CTEK SWEDEN AB neither assumes nor authorizes anyone to assume or make
any other obligation towards the product other than his limited warranty.

TECHNICAL SPECIFICATION

Model MULTI XS 3600
Voltage AC 220-240VAC, 50-60Hz
Back current drain* < 1mA
Voltage Charging Voltage Nominal: 12V

14.4V; 14.7V
Ripple** Max 50mV rms, max 0.13A
Current 0,8A; 3,6A
Ambient Temperature - 20°C to + 50°C, power is reduced automatically at increased

Cooling Natural convection.
Charging cycle M45 is a multistage fully automatic charger
Type of batteries All types of 12V lead-acid batteries (Wet, MF, VRLA, AGM and

Battery Capacity 1.2–120Ah
Dimensions 165x61x38mm (L x W x H)
Insulation IP65
Weight 0.5 kg

*) Back Current Drain is what the charger uses to drain the battery if the power cord is discon­nected.
**) Quality of the current and voltage are very important. High current ripple heats up the
battery and makes the positive electrode age prematurely. High voltage ripple could harm other
equipment connected to the battery. M45 produces a high quality current and voltage with very
low ripple.

ambient temperature.

GEL).

MANUFACTURER’S DECLARATION

CTEK SWEDEN AB, Rostugnsvägen 3, 776 70 VIKMANSHYTTAN, SWEDEN. Declares
under sole responsibility that the battery charger M45, to which this declaration relates is in
conformity with the following LVD standards: EN60335-1, EN60335-2-29 according to the terms
of directive 2006/95/EC. This product also is in agreement with the following EMC standards:
EN55011, EN 61000-3-3, EN 61000-3-2, EN55014-1 and EN55014-2 according to the terms of
directive 2004/108/EC.

VIKMANSHYTTAN, SWEDEN 2008-12-12
Börje Maleus, VD
CTEK SWEDEN AB,
Rostugnsvägen 3
776 70 VIKMANSHYTTAN, SWEDEN
Fax: [phone]
www.ctek.com

BULK CHARGING TIME

The table shows the length of time for bulk charging.

Battery size (Ah) Mode Time (h)

2

8 8

14

20 5

60 15

100 25

120 27

2

3

EN

20013254A

20013254A M45 Manual EU, Print 001.indd 1 2011-06-20 09:36:59