FAQ

Top 10 FAQ
Can I leave the charger connected to the battery for a long time?
What charger is suitable for my vehicle?
Can I use a smaller / bigger charger then recommended for my battery?
My charger gets very warm, is it normal?
My charger does not start charging, is it broken?
Can I charge my vehicle through the cig-socket?
CTEK manual says: ”Connect the black clamp to the vehicle chassis remote from the fuel pipe and the battery" . In the picture beside is shown, that the black clamp is connected to the battery's negative pole. What is right?
Can I charge without removing the battery from the vehicle, or opening the caps?
Can I charge Lithium batteries with a regular CTEK charger and vice versa?
Charger never goes further from the float (first green) level?

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General

General
Can I leave the charger connected to the battery for a long time?
Yes! CTEK chargers are developed to fully charge a battery and then automatically switch over to long term maintenance.
Before leaving the charger unattended for long time, ensure that the battery is fully charged, indicated by a green light.
What charger is suitable for my vehicle?
Choose charger depending on the size of your battery. The more amps the charger can deliver, the faster you’re your battery will be recharged.
Use the SELECT CHARGER function on the home page.
http://ctek.com/gb/en/chargers

Can I use a smaller / bigger charger then recommended for my battery?
Choose charger depending on the size of your battery. Use the SELECT CHARGER function on the home page.
http://ctek.com/gb/en/chargers



Charging with a smaller charger than recommended will take longer time and will not optimally extend the battery life and performance.
Charging with a bigger charger than recommended will not result in a completely charged battery and will not optimally extend the battery life and performance.
My charger gets very warm, is it normal?
Yes, that is normal when the charger is working hard in the bulk stage. The heat is developed in certain circumstances and is depending on the receiver (battery).
The charger does not necessarily heat up while charging another battery.
My charger does not start charging, is it broken?
CTEK chargers needs some counter voltage to start providing tension/current.
If the connection is poor between the charger and the battery, the charging does not start.
If the battery is completely flat, 0V, the charging does not start.

If you think the product is faulty and within warranty:
1. Connect the product to another battery
2. Connect the product to mains
3. Check if the LEDs light up
4. Press the mode button and see if it works

If you still believe the charger is faulty, please return it with the receipt to the retailer.
How much electrical energy does it take to charge a lead-acid battery with a CTEK charger?
Here is an easy way to calculate the electrical energy expenditure when charging a lead-acid battery with CTEK chargers.

Given:
Battery voltage, Bv = 12V
Battery size, Bs = 75Ah
The battery's charge level, Bl = 50%
The battery's efficiency level = 87%
CTEK charger's efficiency level = 80%

Calculate:
Energy consumed from the mains supply to fully charge the battery (En)

First, how much energy is needed to fill the battery?
12V x 75Ah x 50% = 12x75x0.5=450Wh

How much energy does the charger need to deliver based on the battery's efficiency level?
450Wh / 87% = 450/0.87 = 517Wh

How much energy does the mains supply deliver to the charger when taking the efficiency level into consideration?
En = 517Wh / 80% =517 / 0.8 = 647Wh or 0,647kWh.

Answer:
0.647kWh is used to charge the battery based on the given data.
With today's electricity prices, the cost is about SEK 1 to charge a halv-charged 75Ah battery.

It is possible to calculate to 80% efficiency for all models of CTEK chargers.
Vary the battery sizes (Bs) and charging level (Bl) to calculate other examples.
A CTEK charger is so small. How can it charge so quickly and efficiently, when compared with ordinary chargers?
CTEK's chargers use the same type of technology that computers use to reduce dimensions, to increase power and to charge using a well controlled and 'pure' current. Also, think how big mobile telephones were 15 years ago and how small they are today, and can even so do so much more.
What aspects should I think about when choosing a charger?
Answer: You should think about 3 things when choosing a charger: 1. How large the battery you want to charge is. 2. How discharged it will be before you get a chance to recharge it. 3. How quickly you need the battery to fully recharge. If the battery is large, completely flat and must be charged quickly! Then you should choose a powerful charger such as the MXS 25 or M300. If you instead want to be sure that your motorcycle battery is charged and is kept charged no matter whether you are going to use it tomorrow or in 6 months, then time is not so important and a small charger will work well. XS 8.0 or MXS 3.6 are, for example, good choices.
I think my charger is defective. What should I do?
If the charger does not work, then you should submit a guarantee claim. • The product should be returned with the receipt to the retailer. • The retailer will distribute claim products via distributors to CTEK. • Fill in and print out the guarantee claim form and attach it to the product, to ensure quick and correct fault tracing. • The product guarantee only applies to faults which have not been caused by the user and to claims submitted within the guarantee period. 2, or 5 years depending on product and model. Products purchased before 1 January 2007 have a 2 year guarantee. Refer to the user manual. • CTEK will not repair the product under guarantee if no receipt is attached to the product. • The guarantee ceases if the product has been opened, intentionally damaged or has been modified in any other way. • CTEK does not compensate customers for any incidental or consequential damages which are caused by faulty products or which arise in association with the use of the product. • CTEK will return the product if CTEK’s investigation shows that the product is not faulty. • Faulty products will be repaired or be replaced with equivalent products. • The credited amount can be redeemed at the next purchase. • Products will be returned without being examined if the product‘s guarantee has expired and the product is not clearly faulty. Note that the quality of the product cannot be guaranteed by CTEK. • Faulty units that cannot be repaired are disposed of by CTEK. • If a guarantee claim for a faulty product is not approved, then the charger will only be returned if you specifically request this. You must however cover the postage yourself.
What is ripple and how does it affect batteries?
Ripple is a measurement of the unevenness of the current and voltage supplied by the charger. High current ripple results in the heating up and drying out of a battery and in a shortened lifetime. High voltage ripple results in imprecise charging and can damage a vehicle‘s electronics. CTEK's chargers have a very 'pure' charge current and voltage, i.e. minimal ripple.
Installation
Can I charge my vehicle through the cig-socket?
If your socket is live when the ignition is turned off.
Check the vehicle user manual, contact your vehicle retailer or test with any cig-plug device, if your vehicle supports the function.
CTEK manual says: ”Connect the black clamp to the vehicle chassis remote from the fuel pipe and the battery" . In the picture beside is shown, that the black clamp is connected to the battery's negative pole. What is right?
The text describes how to connect to a battery in a vehicle. The picture shows how to connect to a battery not connected to a vehicle.
The charger should be connected according to the vehicle user manual.
Can I connect all of my 12V batteries and maintenance charge them all at the same time?
That is possible. But remember that all batteries should be fully charged individually before they are connected in parallel. Bear in mind that the combined size of the batteries must not exceed the recommended charging range of the charger. If the batteries differ greatly in size (Ah), age and condition, this could cause great wear to the batteries that are in the best condition. A battery in good condition that is being stored for the winter might self-discharge under 90% of fully charged once or twice over the course of the winter. But, batteries in poor condition may do this once or twice a week. If the batteries are parallel connected with a charger connected, each individual battery does not get the charge it needs. It may be easier to set a Comfort Indicator on all individual batteries and move a charger between the batteries needing charging. This gives each battery the best charging based on its individual needs and no battery will become worn and require early replacement.
Does the battery have to be disconnected from the vehicle when it is being charged with a CTEK charger?
No, CTEK chargers cannot damage sensitive electronics. So, you don't have to disconnect the battery from the vehicle! However, you should take extra care when using Recond because the voltage is 15.8V. Most manufacturers consider everything to be fine as long is voltage is below 16V and CTEK is under that limit by a good margin, even during Recond. Note that the service life of some components is shortened by high voltage. A rule of thumb says that a light bulb's service life is halved by increasing voltage by 5%, but this is normally not any great danger. If you have any sensitive electronics for which the manufacturer warns against high voltage: disconnect them!
Why do you connect minus to ground and not to the battery?
You can connect a CTEK charger directly to the minus pole instead of to the chassis without any risk. CTEK recommends connecting the minus clamp to ground instead of the minus pole to eliminate the risk of sparking close to the battery. Explosive oxy-hydrogen gas could be found near the battery. However, CTEK chargers are non-sparking and with their smart charging, generate minimal oxy-hydrogen gas. There is therefore very little risk associated with connecting both clamps to the battery poles.
I want to permanently install a CTEK in my car to charge the car battery when the car's engine/passenger compartment heater is connected to the mains. How do I do this?
We don't have any description for this, but the installation is not so complicated. The charger must not be installed inside the engine compartment. In such cases, the main cable (230V) must be of an engine heater type as per Nordic regulations. The charger should instead be installed in the passenger compartment. Connect the mains cable to the passenger compartment heater socket, with a branching if so desired. Connect the battery cable to the car battery, preferably with the ring terminals supplied with the charger. If the battery is mounted in the engine compartment in the car, you can route the battery cable through the car bulkhead (the wall between the passenger compartment and the engine compartment). You should install a fuse on the plus battery cable (red), as close to the battery as possible since it is a permanent installation.
Does CTEK have a Y-cable so you can charge 2 MCs with one charger? It would be practical so I could maintenance charge 2 MCs all winter without having to switch the charger back and forth between two motorcycles.
CTEK has never supplied Y-cables because it is an unsafe solution. With a Y-cable, you connect the batteries of the two motorcycles. You could compare this to the starter cables you use to jump-start a car. If one battery is fully charged and the other is completely drained, there is an incredibly high current between the batteries. But, the difference is that the cable is much thinner than if you have starter cables between 2 cars. There are two risks. The cable could burn off – and then you'd have to pray to a higher power that the cable is the only thing burned. If the Y-cable is fuse protected and the fuse is tripped, you think you're charging even though you're not. This leads to a lot of anger and expense when spring arrives. A better method is to have one COMFORT INDICATOR on each MC. When you check on the bikes, you can then easily see if you need to switch the charger from one MC to the other. Naturally, it would be even easier to have one charger for each MC.
Can I charge a 24V system with two 12V chargers connected in series?
Yes, this is perfectly OK and is actually preferable for the batteries. Connect one charger for each battery.
Batteries
Can I charge without removing the battery from the vehicle, or opening the caps?
There is no reason to disconnect or remove the battery from the vehicle, or open the battery caps, while charging. CTEK chargers are spark proof and reverse polarity protected and electronic safe.
Can I charge Lithium batteries with a regular CTEK charger and vice versa?
No. Lithium batteries needs a different charge than lead/acid batteries. Due to severe risks if overcharging, we do not recommend using a CTEK charger that is developed for lead/acid batteries, for that purpose.
Charging lead/acid batteries with a Lithium charger does not give the best result and cannot be recommended.
Does the battery have to be disconnected from the vehicle when it is being charged with a CTEK charger?
No, CTEK chargers cannot damage sensitive electronics. So, you don't have to disconnect the battery from the vehicle! However, you should take extra care when using Recond because the voltage is 15.8V. Most manufacturers consider everything to be fine as long is voltage is below 16V and CTEK is under that limit by a good margin, even during Recond. Note that the service life of some components is shortened by high voltage. A rule of thumb says that a light bulb's life span is halved by increasing voltage by 5%, but this is normally not any great danger. If you have any sensitive electronics for which the manufacturer warns against high voltage: disconnect them!
What happens if I use the charger for batteries that are larger than you recommend?
Using a small charger makes the charging time longer. Sometimes, this is critical. In such cases, you should use a larger charger. If you only use the charger for maintenance charging, a really small charger is often sufficient.
Can I maintenance charge several batteries at the same time?
CTEK chargers are fully capable of charging or maintenance charging several batteries connected in parallel provided that the total size of the batteries (Ah) does not exceed the recommended size for the charger. Remember to completely charge each battery individually before connecting them. Otherwise, there is a risk of current surges between that batteries that can cause unnecessary wear.
Are there CTEK chargers for other battery types?
CTEK also produces the CTEK LITHIUM XS charger, which has an ideal charging programme for 4x LiFePO4 (lithium iron phosphate) with a nominal 12V terminal voltage.
The CTEK LITHIUM XS can also communicate with the battery's built-in electronics if the electronics have shut down the battery to protect it against deep discharging.
Can a frozen battery be charged?
No, the battery must be thawed first. Note that the battery was discharged first. Otherwise, it would not have frozen. Check the battery carefully for cracks or other damage. A fully-charged battery freezes at -67 degrees Celsius, while a drained battery can freeze at just a few degrees below zero. If you think your battery is or was frozen, we recommend that you have the battery tested. It has probably been damaged and may have to be replaced.
Can I charge lithium ion batteries with my CTEK charger?
Our chargers have a charging programme suited to lead-acid batteries. When you study manuals for LiFePO4 batteries with four cells connected in series (4x), you will see that using our standard chargers for lead-acid batteries is fine as long as you use NORMAL/CAR setting for charging programmes and not settings such as RECOND/BOOST/SNOWFLAKE and temperature compensation.

LiFePO4 (lithium iron phosphate) is a type of lithium battery which can be constructed to match the voltage of a lead-acid battery of 6V/12V/24V nominal voltage. However, we cannot guarantee that everything is perfect and you assume all risk and liability if you use the charger with these types of battery. Lithium is a very reactive material and battery manufacturers put great efforts into controlling and monitoring the batteries for optimum safety and performance.

To charge a 4x LiFePO4 (12V) battery perfectly, you must use a CTEK LITHIUM XS charger with the optimum charging programme for this battery type. The CTEK LITHIUM XS can also communicate with the battery's built-in electronics if the electronics have shut down the battery to protect it against deep discharging.
What do the abbreviations MF, GEL and AGM mean?
Gel, AGM, Vlies, MF, Calcium/Calcium and Hybrid are abbreviations for different types of lead-acid batteries. Thus, they can be charged with CTEK chargers. 
Can I charge GEL batteries with my CTEK charger?
GEL batteries are a type of lead/acid battery where the acid is bound in a gel. These batteries can be charged with a CTEK charger with no problems whatsoever.
How deeply discharged can a battery be and still be recharged by a CTEK charger?
A battery is considered to be discharged when the voltage is below 10.5V. It can however provide energy all the way down to 7-8 volts. Most models can handle batteries with voltages down to 2V. XS 0.8 charges from 6V while XC 0.8 charges from 3V. MXS 7, MXS 25 and MXT 14 in Supply mode can still charge from zero volts in the battery. Note that some batteries can be damaged by discharging that is too deep. CTEK chargers try to save these batteries through pulsing, to reduce sulphation or soft-start (some models). A battery which is below these levels is often in poor condition and needs to be replaced.
Charger functions
Charger never goes further from the float (first green) level?
Charger stays in float maintenance mode for 10 days, keeping the battery top charged with minimum input of current. After 10 days the program goes further to the last stage, pulse level, for long time maintenance.
What happens if I use the charger for batteries that are larger than you recommend?
Using a small charger makes the charging time longer. Sometimes, this is critical. In such cases, you should use a larger charger. If you only use the charger for maintenance charging, a really small charger is often sufficient.
Are there CTEK chargers for other battery types?
CTEK also produces the CTEK LITHIUM XS charger, which has an ideal charging programme for 4x LiFePO4 (lithium iron phosphate) with a nominal 12V terminal voltage.
The CTEK LITHIUM XS can also communicate with the battery's built-in electronics if the electronics have shut down the battery to protect it against deep discharging.
The charger quickly switches over to maintenance charging but without any battery capacity being achieved.
The charger's behaviour can be explained in two different ways, from the battery's point of view: a) Sealed batteries which have lost fluid can behave in this way. The voltage rises quickly but capacity is near zero. This is shown by the battery remaining at a relatively high voltage after having been disconnected from the charger. It can seem as though a 50Ah battery has changed into perhaps a 20Ah battery. Measure the battery voltage with the charger disconnected. If the voltage is 13V or more, then this is probably the correct explanation. The battery is dead and must be replaced. If fluid has been lost, then the upper parts of the battery's plates can be oxidised and therefore dysfunctional. b) A sulphated battery can also result in this behaviour. The sulphate layer insulates and no current flows. Voltage is also measured with the charger disconnected in this situation. But the voltage instead falls quickly to 12V or lower. The charger should, due to the voltage falling so quickly, respond to this by rapidly switching on and off. It is also unlikely of achieving any long term battery life in this case. A CTEK charger tries to 'wake' this type of battery with pulses. The battery will however soon be dead even where it can be brought back to life. Both these faults can be avoided where a CTEK battery charge is used during the out of season period.
Can you really just connect up and then forget the charger?
Always check that the charger has switched to maintenance charging mode before leaving the charger unattended and connected for long periods of time. Chargers must be disconnected from batteries where the charger does not switch to maintenance charging within three days. If the charger has switched over to maintenance charging, then everything is as it should be, the battery is probably healthy and will function for a long period of time together with your CTEK charger. If the charger has not switched over to maintenance charging (green lamp lit) within a couple of days, then this is a sign that something is wrong. Possible causes:
  • A large older type of battery, antimony batteries, behave differently.
  • Charging takes longer and the battery can be overcharged if large consumers are connected to the battery.
  • The battery is sulphated from start. Charging will then take longer, as the battery's higher inner resistance limits how much current it can receive.
  • The battery is spent and needs to be replaced.
Will a CTEK charger remember the settings if you disconnect it from the mains power?
If you disconnect both battery and mains power. The battery must have a voltage above 6V for MXS 3.6 and Zafir 45 chargers to remember settings. Avoid placing a MULTI charger too close to extremely strong electrical fields such as ignition systems, as this can result in the charger losing the settings.
Marine
Are the primary and secondary sides galvanically separated in your chargers?
Yes, all CTEK chargers are galvanically separated.
I'm thinking about installing an electric motor in my sailboat. The motor is run on 48V and I was thinking about either running on eight 6V batteries (deep cycle batteries) or four 12V batteries (type AGM).
Yes, you can use two 24V chargers in your 48V system, but you would get the best results from using four 12V chargers instead. This gives you better control so all batteries obtain the same degree of charge. For two serial-connected batteries, a 24V charger has no control over the voltage being equally distributed over the two batteries. On a wet battery, it is normal for there to be some gassing so that the battery can become fully charged. But, CTEK chargers do not overload the batteries, which prevents major gassing from occurring. If it is not possible to ventilate away the oxy-hydrogen gas, we recommend against using such batteries. Some “wet” batteries have a hose nipple that you can use to connect a hose for venting away the oxy-hydrogen gas. Even though oxy-hydrogen gas is not a problem during normal charging, problems can arise with the battery, e.g. cell fault. In such cases, gassing can be huge if the accident occurs before the charger switches off.
I have a 10-metre motorboat with two engines. I have two 115Ah starter batteries and a consumer bank of four batteries of 115Ah each. What would be your charging recommendation for my boat?
I have two possible solutions for you, depending on your charging needs. Charging during travel: In order to be out on the water for a long time with the consumer bank being discharged, you can connect a DC/DC charger, D250S DUAL, on the cable between the generator and the starter battery. This lets you charge the consumer bank up to 20A when the generator is running. You can also connect another current source, such as a solar panel. D250S DUAL has CTEK's different charging stages and temperature compensation that ensures that voltage is correct regardless of the temperature around the battery. If you want more powerful charging, you can add a SMARTPASS. This increases charging to up to 60A. Charging via land current: When you have access to 220 sockets, I recommend one charger for the starter bank and one for the consumer bank. Choose the size based on the discharged batteries themselves and how quickly you want them recharged. I would recommend an M100 for the starter batteries and an M300 for the consumer bank.
Charger settings
I have an AGM battery. Do I charge it in snowflake mode?
It depends. Optima and Hawker recommend snowflake mode. If there is no indication on the battery, use car mode for batteries over 14Ah or MC mode for batteries under 14Ah.

DC/DC

OFF ROAD 100A (D250S Dual+Smartpass+Display)
CTEK BM-1 COMPACT MONITOR
Why is the screen of my CTEK BM-1 Compact blank?
Check the wiring is correct and securely terminated. Check the fuse, and check that the battery is not completely flat.
CTEK BM-1 COMPACT MONITOR
Why does my CTEK BM-1 Compact show that the number of hours remaining is high or low when a constant discharge current is flowing?
The actual battery capacity is different from the value you have entered in Engineering. The reasons for this difference have been discussed above. Adjust the battery capacity in Engineering to match the battery.
CTEK BM-1 COMPACT MONITOR
My battery is made up of a bank of several batteries. Is that a problem?
Not as long as the combination produces a nominal 12 volts, and all the current drawn from the bank passes through the shunt.
CTEK BM-1 COMPACT MONITOR
Can the CTEK BM-1 Compact monitor my engine starting battery as well as my service battery?
No, it cannot. The service battery is in continuous use, and so needs continuous monitoring. The starter battery, however, is subject only to periodic heavy loads followed by float charging, and so does not need to be monitored.
CTEK BM-1 COMPACT MONITOR
I have another voltmeter on my vehicle which shows a different value to the CTEK BM-1 Compact indication.
The CTEK BM-1 Compact very accurately measures the voltage directly across the battery terminals. Other voltmeters may read differently owing to volt drops in the wiring.
CTEK BM-1 COMPACT MONITOR
Why does my CTEK BM-1 Compact show a higher capacity immediately after charging than it does after a few minutes discharging?
This is an unavoidable feature of battery chemistry, which varies from battery to battery, and the charging system used.
CTEK BM-1 COMPACT MONITOR
Do I need to disconnect my CTEK BM-1 Compact when I leave the vehicle for long periods?
No. The CTEK BM-1 Compact is designed to be permanently connected to the battery. It is independently fused, and draws only 1.5mA from the battery. At such a low current, it would take several years to discharge a typical fully-charged service battery.
CTEK BM-1 COMPACT MONITOR
Why does my battery seem to have less capacity than it says on its label?
The value on the manufacturer's label is seldom the value achieved in service, because of the deterioration of the cells' plates and many other factors. If it seems to have much lower than its expected capacity, it may need replacement, or you may feel that changing the nominal capacity from the Engineering mode will suffice to let you know well enough the percentage charge remaining.
CTEK BM-1 COMPACT MONITOR
When on heavy load, the time to run is lower than I expect. Is this correct?
YES. When heavily loaded, a lead-acid battery delivers less energy than expected owing to electrolyte exhaustion and stagnation. When the battery is delivering heavy currents the CTEK BM-1 Compact uses Peukert's equation to allow for these effects and so show a better estimate for the time to run.
CTEK BM-1 COMPACT MONITOR
I have a 500W appliance. How do I know what current it will draw?
Divide the power rating by the nominal supply voltage to find the current. So, for example, your 500W appliance will draw 500W/12V Amps from a nominal 12V battery: i.e. about 42Amps
CTEK BM-1 COMPACT MONITOR
What happens with the CTEK BM-1 if I connect it to a battery with over 600Ah? Will it damage my monitor?
It will not damage the monitor. The voltage readings displayed by the CTEK BM1 will however not be accurate. If the battery is over 600Ah the monitor will show fully charged prematurely.

Background
The CTEK BM 1 monitors capacity of batteries / battery banks from 5Ah up to 600Ah, which enables it to monitor most battery solutions.
The technology used within the CTEK OFF ROAD 100A package means that it has the capacity to power battery banks up to 800 Ah. Whilst we have chosen to retain this higher capacity, for maximum flexibility, we know that this type of power requirement is uncommon for boats, caravans and motorhomes. The monitor has therefore been developed to communicate with systems up to 600Ah.
There is no risk to the monitor, the CTEK Off Road 100A unit or the vehicle if the CTEK BM1 is attached to a battery bank larger than 600Ah. The only result will be that voltage readings displayed by the CTEK BM1 will not be accurate. If the battery is over 600Ah the monitor will show fully charged prematurely. It will not damage the monitor.
What do the led lamps mean?


Error lamp
Power lamp
1. Service battery charging lamp
2. Alternator battery consumption
3. Alternator battery charging lamp
4. Service battery consumption lamp
is lit, what has happened?
The SMARTPASS has detected a problem. The LED flashes with other LEDs to indicate what the problem is.


Led 1 flashing: A problem is detected with the service battery. The current to the battery is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try five times to start charging the battery. If all five attempts fail, the SMARTPASS has to be disconnected from both batteries before it can be restarted. In this situation, check the cables for short circuit. If the SMARTPASS is overheated charging will automatically restart when the temperature has dropped again.

Led 2 flashing: A problem is detected with the consumer output connected to the starter battery input. The current to the consumer output is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try to start charging the battery five times. If all five attempts fail the SMARTPASS needs to be disconnected from both batteries before it can restart. If this is the case check the cables for short circuit, there could also be too many consumers connected. If the SMARTPASS is overheated output will automatically turn on when the temperature has dropped again.

Led 3 flashing: A problem is detected with the starter battery while maintenance charging. The current to the battery is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try to start charging the battery five times. If all five attempts fail the SMARTPASS needs to be disconnected from both batteries before it can restart. If this is the case check the cables for short circuit. If the SMARTPASS is overheated output will automatically turn on when the temperature has dropped again.

Led 4 flashing: A problem is detected with the consumer output connected to the service battery. The current to the output is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try to start charging the battery five times. If all five attempts fail the SMARTPASS needs to be disconnected from both batteries before it can restart. If this is the case check the cables for short circuit, there could also be too many consumers connected. If the SMARTPASS is overheated output will automatically turn on when the temperature has dropped. It could also mean that the battery voltage on the consumer battery is too low.

Led 1, 3 and 4 flashing: The temperature on the service battery is too high. The SMARTPASS will not charge the battery if the temperature is above 65 °C, as soon as the temperature is lower, the charging will automatically restart.
Why is the POWER-led flashing rapidly?
SMARTPASS has gone into power save mode due to low voltage in the starter battery. There is no charger or alternator turned on for the starter battery.
Why is the POWER-led glowing faintly?
SMARTPASS has gone into power save mode due to low voltage in the starter battery. There is no charger or alternator turned on for the starter battery.
Why does the SMARTPASS not start charging?
Check the connections, including the ground. In order to start functioning, SMARTPASS needs over 13,1V from the starter battery. The voltage on the service battery needs to be above 5V.

Measure the voltage and verify that they are within the levels specified above.
Why does the SMARTPASS not stop charging the service battery even though the alternator or charger on the starter battery has been turned off?
When the engine is turned off, SMARTPASS will continue charging as long as the voltage of the starter battery is above 12.8V. Due to this, the end of charging will be briefly delayed.

NOTE: It will NOT drain the starter battery. If there is power to the SMARTPASS from the solar panel, it will charge/maintain the service battery.
Why does the SMARTPASS not supply the consumers connected to the service battery?
The SMARTPASS will turn off the consumer output if the service battery drops to 11.5V. This will prevent the battery from being damaged due to being drained too much. To turn on the consumer output again the service battery needs to be charged.
Can I use a SMARTPASS without a D250S DUAL?
Yes you can. If you do not need a charging function to the service battery, SMARTPASS can be a good solution to provide the service battery with current, especially if you use the service battery while charging (fridge, microwave oven etc.).
D250S DUAL
Why is the POWER- led lamp not lit?
There can be various reasons.

Make sure the system is properly connected and the ground terminal firmly tightened.

Check that the voltage on the service battery is higher than 9 V (the POWER- led lamp lights up when 9V)
D250S DUAL
Why is the POWER- led lamp flashing rapidly?
The charger has gone into power save mode due to low voltage from the starter battery.
D250S DUAL
Why is the POWER- led lamp glowing faintly?
The charger has gone into power save mode due to low voltage from the starter battery.
D250S DUAL
Why does the D250S DUAL not start charging?
In order to start charging the supply voltage from the D250S DUAL needs to be above 13.1V at the service battery input, or above 11.5V from the solar input on the D250S DUAL. In addition the voltage on the service battery has to be above 5V.

Measure the voltage of the batteries, and verify that they are within the levels specified above.
D250S DUAL
Why does the D250S DUAL not stop charging the service battery even though the alternator or charger on the starter battery has been turned off?
When the engine is turned off, D250S DUAL will continue charging as long as the voltage of the starter battery is above 12.8V. Due to this, the end of charging will be briefly delayed.

NOTE: It will NOT drain the starter battery. If there is power to the D250S DUAL from the solar panel, it will charge/maintain the service battery.
D250S DUAL
What does the led lamps mean?


D250S DUAL
Why is the error lamp flashing?
The charger has detected a problem. Note what/which led lamps are also flashing and what problem has occurred. See table below:

C250S DUAL
Power LED is not lit
Explanation: The target battery voltage must be above 9V.
C250S DUAL
The Power LEDs are flashing rapidly or glowing faint
Explanation: The charger has entered power save mode due to low voltage.
C250S DUAL
The charger does not start charging
Explanation: In order to start charging the supply voltage needs to be above 13.1V on the supply battery input or above 11.5V on the solar input. The voltage on the target battery also needs to above 5V. The solar voltage also needs to be higher than the alternator input voltage.
Test: Test Use a voltmeter to verify that the voltages are within the levels specified above.
C250S DUAL
The charger does not stop charging the target battery even though the alternator or charger on the supply battery has been turned off
When charging of the supply battery is turned off the voltage will drop. The output power of the charger is dependent on the input voltage. With lower input voltage the output power is lower. Due to this it may take some time until the charger stops. It will however not drain the supply battery, the charger will turn off when the voltage has dropped below 12.8V. If there is power on the solar panel, this will be used to charge the target battery.
C250S DUAL
is flashing
Explanation: The charger has detected a problem. This LED is always flashing with some other LEDs lit to tell what the problem is.

If only the power on lamp is lit then the temperature at the target battery is too high. The charger will not charge the battery if the temperature is above 65 °C, as soon as the temperature is lower, the charging will automatically restart.

If the alternator or solar LED or both are lit when the error led is flashing a connection problem is detected with the target battery, check the connections.
SMARTPASS
The Power LED is flashing rapidly or glowing faint
Explanation: The charger has entered power save mode due to low voltage. There is no charger or alternator turned on for the supply battery.
The SMARTPASS does not start charging
Explanation: In order to start charging the supply voltage needs to be above 13.1V. The voltage on the target battery also needs to above 5V.
Test: Test Use a voltmeter to verify that the voltages are within the levels specified above.
The SMARTPASS does not stop charging the target battery even though the alternator or charger on the supply battery has been turned off
When charging of the supply battery is turned off the voltage will drop. The SMARTPASS will turn off when the voltage has dropped below 12.8V, if there are no parallel loads this will take some time.
The SMARTPASS does not supply the consumers from the consumer battery
The SMARTPASS will turn off the consumer output if the consumer battery reaches 11.5V. This will prevent the battery from being damaged due to being drained too much. To turn on the consumer output again the consumer battery needs to be charged.
OFF GRID 20A (D250S Dual+Display)
CTEK BM-1 COMPACT MONITOR
Why is the screen of my CTEK BM-1 Compact blank?
Check the wiring is correct and securely terminated. Check the fuse, and check that the battery is not completely flat.
CTEK BM-1 COMPACT MONITOR
Why does my CTEK BM-1 Compact show that the number of hours remaining is high or low when a constant discharge current is flowing?
The actual battery capacity is different from the value you have entered in Engineering. The reasons for this difference have been discussed above. Adjust the battery capacity in Engineering to match the battery.
CTEK BM-1 COMPACT MONITOR
My battery is made up of a bank of several batteries. Is that a problem?
Not as long as the combination produces a nominal 12 volts, and all the current drawn from the bank passes through the shunt.
CTEK BM-1 COMPACT MONITOR
Can the CTEK BM-1 Compact monitor my engine starting battery as well as my service battery?
No, it cannot. The service battery is in continuous use, and so needs continuous monitoring. The starter battery, however, is subject only to periodic heavy loads followed by float charging, and so does not need to be monitored.
CTEK BM-1 COMPACT MONITOR
I have another voltmeter on my vehicle which shows a different value to the CTEK BM-1 Compact indication.
The CTEK BM-1 Compact very accurately measures the voltage directly across the battery terminals. Other voltmeters may read differently owing to volt drops in the wiring.
CTEK BM-1 COMPACT MONITOR
Why does my CTEK BM-1 Compact show a higher capacity immediately after charging than it does after a few minutes discharging?
This is an unavoidable feature of battery chemistry, which varies from battery to battery, and the charging system used.
CTEK BM-1 COMPACT MONITOR
Do I need to disconnect my CTEK BM-1 Compact when I leave the vehicle for long periods?
No. The CTEK BM-1 Compact is designed to be permanently connected to the battery. It is independently fused, and draws only 1.5mA from the battery. At such a low current, it would take several years to discharge a typical fully-charged service battery.
CTEK BM-1 COMPACT MONITOR
Why does my battery seem to have less capacity than it says on its label?
The value on the manufacturer's label is seldom the value achieved in service, because of the deterioration of the cells' plates and many other factors. If it seems to have much lower than its expected capacity, it may need replacement, or you may feel that changing the nominal capacity from the Engineering mode will suffice to let you know well enough the percentage charge remaining.
CTEK BM-1 COMPACT MONITOR
When on heavy load, the time to run is lower than I expect. Is this correct?
YES. When heavily loaded, a lead-acid battery delivers less energy than expected owing to electrolyte exhaustion and stagnation. When the battery is delivering heavy currents the CTEK BM-1 Compact uses Peukert's equation to allow for these effects and so show a better estimate for the time to run.
CTEK BM-1 COMPACT MONITOR
I have a 500W appliance. How do I know what current it will draw?
Divide the power rating by the nominal supply voltage to find the current. So, for example, your 500W appliance will draw 500W/12V Amps from a nominal 12V battery: i.e. about 42Amps
D250S DUAL
Why is the POWER- led lamp not lit?
There can be various reasons.

Make sure the system is properly connected and the ground terminal firmly tightened.

Check that the voltage on the service battery is higher than 9 V (the POWER- led lamp lights up when 9V)
D250S DUAL
Why is the POWER- led lamp flashing rapidly?
The charger has gone into power save mode due to low voltage from the starter battery.
D250S DUAL
Why is the POWER- led lamp glowing faintly?
The charger has gone into power save mode due to low voltage from the starter battery.
D250S DUAL
Why does the D250S DUAL not start charging?
In order to start charging the supply voltage from the D250S DUAL needs to be above 13.1V at the service battery input, or above 11.5V from the solar input on the D250S DUAL. In addition the voltage on the service battery has to be above 5V.

Measure the voltage of the batteries, and verify that they are within the levels specified above.
D250S DUAL
Why does the D250S DUAL not stop charging the service battery even though the alternator or charger on the starter battery has been turned off?
When the engine is turned off, D250S DUAL will continue charging as long as the voltage of the starter battery is above 12.8V. Due to this, the end of charging will be briefly delayed.

NOTE: It will NOT drain the starter battery. If there is power to the D250S DUAL from the solar panel, it will charge/maintain the service battery.
D250S DUAL
What does the led lamps mean?


D250S DUAL
Why is the error lamp flashing?
The charger has detected a problem. Note what/which led lamps are also flashing and what problem has occurred. See table below:

C250S DUAL
Power LED is not lit
Explanation: The target battery voltage must be above 9V.
C250S DUAL
The Power LEDs are flashing rapidly or glowing faint
Explanation: The charger has entered power save mode due to low voltage.
C250S DUAL
The charger does not start charging
Explanation: In order to start charging the supply voltage needs to be above 13.1V on the supply battery input or above 11.5V on the solar input. The voltage on the target battery also needs to above 5V. The solar voltage also needs to be higher than the alternator input voltage.
Test: Test Use a voltmeter to verify that the voltages are within the levels specified above.
C250S DUAL
The charger does not stop charging the target battery even though the alternator or charger on the supply battery has been turned off
When charging of the supply battery is turned off the voltage will drop. The output power of the charger is dependent on the input voltage. With lower input voltage the output power is lower. Due to this it may take some time until the charger stops. It will however not drain the supply battery, the charger will turn off when the voltage has dropped below 12.8V. If there is power on the solar panel, this will be used to charge the target battery.
C250S DUAL
is flashing
Explanation: The charger has detected a problem. This LED is always flashing with some other LEDs lit to tell what the problem is.

If only the power on lamp is lit then the temperature at the target battery is too high. The charger will not charge the battery if the temperature is above 65 °C, as soon as the temperature is lower, the charging will automatically restart.

If the alternator or solar LED or both are lit when the error led is flashing a connection problem is detected with the target battery, check the connections.
SMARTPASS
What do the led lamps mean?


Error lamp
Power lamp
1. Service battery charging lamp
2. Alternator battery consumption
3. Alternator battery charging lamp
4. Service battery consumption lamp
is lit, what has happened?
The SMARTPASS has detected a problem. The LED flashes with other LEDs to indicate what the problem is.


Led 1 flashing: A problem is detected with the service battery. The current to the battery is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try five times to start charging the battery. If all five attempts fail, the SMARTPASS has to be disconnected from both batteries before it can be restarted. In this situation, check the cables for short circuit. If the SMARTPASS is overheated charging will automatically restart when the temperature has dropped again.

Led 2 flashing: A problem is detected with the consumer output connected to the starter battery input. The current to the consumer output is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try to start charging the battery five times. If all five attempts fail the SMARTPASS needs to be disconnected from both batteries before it can restart. If this is the case check the cables for short circuit, there could also be too many consumers connected. If the SMARTPASS is overheated output will automatically turn on when the temperature has dropped again.

Led 3 flashing: A problem is detected with the starter battery while maintenance charging. The current to the battery is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try to start charging the battery five times. If all five attempts fail the SMARTPASS needs to be disconnected from both batteries before it can restart. If this is the case check the cables for short circuit. If the SMARTPASS is overheated output will automatically turn on when the temperature has dropped again.

Led 4 flashing: A problem is detected with the consumer output connected to the service battery. The current to the output is too high or the SMARTPASS is overheated. If the current is too high the SMARTPASS will try to start charging the battery five times. If all five attempts fail the SMARTPASS needs to be disconnected from both batteries before it can restart. If this is the case check the cables for short circuit, there could also be too many consumers connected. If the SMARTPASS is overheated output will automatically turn on when the temperature has dropped. It could also mean that the battery voltage on the consumer battery is too low.

Led 1, 3 and 4 flashing: The temperature on the service battery is too high. The SMARTPASS will not charge the battery if the temperature is above 65 °C, as soon as the temperature is lower, the charging will automatically restart.
Why is the POWER-led flashing rapidly?
SMARTPASS has gone into power save mode due to low voltage in the starter battery. There is no charger or alternator turned on for the starter battery.
Why is the POWER-led glowing faintly?
SMARTPASS has gone into power save mode due to low voltage in the starter battery. There is no charger or alternator turned on for the starter battery.
Why does the SMARTPASS not start charging?
Check the connections, including the ground. In order to start functioning, SMARTPASS needs over 13,1V from the starter battery. The voltage on the service battery needs to be above 5V.

Measure the voltage and verify that they are within the levels specified above.
Why does the SMARTPASS not stop charging the service battery even though the alternator or charger on the starter battery has been turned off?
When the engine is turned off, SMARTPASS will continue charging as long as the voltage of the starter battery is above 12.8V. Due to this, the end of charging will be briefly delayed.

NOTE: It will NOT drain the starter battery. If there is power to the SMARTPASS from the solar panel, it will charge/maintain the service battery.
Why does the SMARTPASS not supply the consumers connected to the service battery?
The SMARTPASS will turn off the consumer output if the service battery drops to 11.5V. This will prevent the battery from being damaged due to being drained too much. To turn on the consumer output again the service battery needs to be charged.
Can I use a SMARTPASS without a D250S DUAL?
Yes you can. If you do not need a charging function to the service battery, SMARTPASS can be a good solution to provide the service battery with current, especially if you use the service battery while charging (fridge, microwave oven etc.).
The Power LED is flashing rapidly or glowing faint
Explanation: The charger has entered power save mode due to low voltage. There is no charger or alternator turned on for the supply battery.
The SMARTPASS does not start charging
Explanation: In order to start charging the supply voltage needs to be above 13.1V. The voltage on the target battery also needs to above 5V.
Test: Test Use a voltmeter to verify that the voltages are within the levels specified above.
The SMARTPASS does not stop charging the target battery even though the alternator or charger on the supply battery has been turned off
When charging of the supply battery is turned off the voltage will drop. The SMARTPASS will turn off when the voltage has dropped below 12.8V, if there are no parallel loads this will take some time.
The SMARTPASS does not supply the consumers from the consumer battery
The SMARTPASS will turn off the consumer output if the consumer battery reaches 11.5V. This will prevent the battery from being damaged due to being drained too much. To turn on the consumer output again the consumer battery needs to be charged.
D250S DUAL
Why is the POWER- led lamp not lit?
There can be various reasons.

Make sure the system is properly connected and the ground terminal firmly tightened.

Check that the voltage on the service battery is higher than 9 V (the POWER- led lamp lights up when 9V)
Why is the POWER- led lamp flashing rapidly?
The charger has gone into power save mode due to low voltage from the starter battery.
Why is the POWER- led lamp glowing faintly?
The charger has gone into power save mode due to low voltage from the starter battery.
Why does the D250S DUAL not start charging?
In order to start charging the supply voltage from the D250S DUAL needs to be above 13.1V at the service battery input, or above 11.5V from the solar input on the D250S DUAL. In addition the voltage on the service battery has to be above 5V.

Measure the voltage of the batteries, and verify that they are within the levels specified above.
Why does the D250S DUAL not stop charging the service battery even though the alternator or charger on the starter battery has been turned off?
When the engine is turned off, D250S DUAL will continue charging as long as the voltage of the starter battery is above 12.8V. Due to this, the end of charging will be briefly delayed.

NOTE: It will NOT drain the starter battery. If there is power to the D250S DUAL from the solar panel, it will charge/maintain the service battery.
What does the led lamps mean?


Why is the error lamp flashing?
The charger has detected a problem. Note what/which led lamps are also flashing and what problem has occurred. See table below:

Power LED is not lit
Explanation: The target battery voltage must be above 9V.
The Power LEDs are flashing rapidly or glowing faint
Explanation: The charger has entered power save mode due to low voltage.
The charger does not start charging
Explanation: In order to start charging the supply voltage needs to be above 13.1V on the supply battery input or above 11.5V on the solar input. The voltage on the target battery also needs to above 5V. The solar voltage also needs to be higher than the alternator input voltage.
Test: Test Use a voltmeter to verify that the voltages are within the levels specified above.
The charger does not stop charging the target battery even though the alternator or charger on the supply battery has been turned off
When charging of the supply battery is turned off the voltage will drop. The output power of the charger is dependent on the input voltage. With lower input voltage the output power is lower. Due to this it may take some time until the charger stops. It will however not drain the supply battery, the charger will turn off when the voltage has dropped below 12.8V. If there is power on the solar panel, this will be used to charge the target battery.
is flashing
Explanation: The charger has detected a problem. This LED is always flashing with some other LEDs lit to tell what the problem is.

If only the power on lamp is lit then the temperature at the target battery is too high. The charger will not charge the battery if the temperature is above 65 °C, as soon as the temperature is lower, the charging will automatically restart.

If the alternator or solar LED or both are lit when the error led is flashing a connection problem is detected with the target battery, check the connections.

Accessories

CTX BATTERY SENSE
How should I connect Battery Sense?
Connect the red positive (+) cable to the battery's positive pole, and the black negative (-) cable to an earthing point on the chassis. Check the vehicle's user manual for information about what is recommended for your vehicle.
What diameter are the eyelets on Battery Sense?
Battery Sense has M6 eyelets, i.e. 6 mm diameter.
Can I connect my charger to Battery Sense?
No, you cannot. You need a CTEK accessory – for more information see
http://ctek.com/gb/en/accessories/
How often does Battery Sense gather information from the battery?
Battery Sense measures the battery's voltage every five minutes and calculates its state of charge.
When does the information update in the app?
The information is shown in the app when your phone is within 10 metres of the sender. If you have the app open in the background, it collects data every 60 minutes if you are within 10 metres of the sender.
Can I force Battery Sense to update?
Yes, you can use the "Pull to refresh" function in the app, which gives you the latest measured values.
("Pull to refresh" = Swipe your finger downwards over the screen in list mode)
How should the negative cable be connected?
The black negative cable should be connected to an earthing point on the vehicle chassis (see your vehicle's user manual).
Does this affect the battery management system?
No.
How much battery power does it use?
It uses about 1 mA, equivalent to about 1 Ah per month. The normal rate of discharge from a battery is about 10 mA. If the vehicle is left unused for a long period we recommend that you charge the battery.
Can I place Battery Sense anywhere in the engine compartment?
You should place it so that it does not come into contact with moving, sharp, hot or otherwise unsuitable surfaces.
Which operating systems does it work on?
It works on Android OS 4.4 or higher
iPhone iOS 7 or higher, installed on iPhone 4S or later models.
How do I know whether I've got Bluetooth 4.0?
This is not generally obvious on your phone. Check with your phone retailer.
Why can't I find the app on Google Play? I have an Android phone
If you have an Android phone that doesn't support OS 4.4 or higher, the app won't be shown on Google Play.
Why can't I find the app on App Store? I have an iPhone 4
If you have an iPhone that doesn't support iOS 7 or higher, the app won't be shown on App Store.
Where can I find more information than what's shown in the manual?
For more information, see www.ctek.com
Can I connect more than one phone to Battery Sense?
Yes, you can connect up to 10 phones to the same sender.
Can I connect my phone to more than one Battery Sense?
Yes. The number of Battery Sense units you can connect to is only limited by your phone's memory.
Can I connect even if I've forgotten my serial number?
Yes – you must disconnect the sender from the battery for at least 30 seconds and then reconnect. Follow the "lost code" guide in the app.
Why doesn't Battery Sense show 100% when charging is complete?
Battery Sense measures the battery's voltage and calculates its state of charge (SOC). The calculation takes account of charging and discharging, and also makes assumptions about the battery's characteristics. Battery Sense is therefore not completely precise.
How can the battery's state of charge (SOC) increase even though I'm not charging or driving my vehicle?
Battery Sense adapts to the battery's resting voltage, which can increase when the battery is not under load.
How close to my vehicle should I be for the app to update?
The effective range may be less if there is an obstruction – for example a wall – in the way.
What does background updating involve?
Measurements are sent to your phone even when the app isn't active.
Why does background updating not work?
The app can be shut down if your phone is low on memory, for example. It's a good idea to activate the function in the app that notifies you if it hasn't been able to update during the last seven days.
Can I update manually?
Yes, you can update manually by using "Pull to refresh".
("Pull to refresh" = Swipe your finger downwards over the screen in list mode)
Can I be notified when the battery is fully charged again (green)?
No, you only get notifications when the battery's status changes as it discharges, to yellow or red.
What levels do the colour indications change at?
The status changes from green to yellow when the battery's state of charge drops below 58%, and from yellow to red when it goes below 35%.
Why doesn't the panel with a figure disappear from the Battery Sense icon?
The panel (iPhone) shows how many senders have yellow or red status or haven't been updated in the last seven days. The panel will disappear when the app has updated and/or the state of charge has changed to green.
Why doesn't Battery Sense work on older phones?
Bluetooth Low Energy is a relatively new technology which is not available on older phones. For iOS you need an iPhone 4S or newer and iOS 7 or later. For Android you need version 4.4 (KitKat).
Does Battery Sense work on my tablet?
Battery Sense has not been developed specifically for tablets but it should work if the OS version and hardware support Bluetooth 4.0 (BLE). The app is only shown among iPhone apps, not iPad apps.
There are three Bluetooth classes. Which does Battery Sense belong to?
Battery Sense is Class 2.
COMFORT INDICATOR
How do I interpret the colour markings on my COMFORT INDICATOR?
GREEN: battery voltage is over 12.65 = battery is fully charged and does not require charging YELLOW: battery voltage is between 12.65 and 12.4V = battery is well charged. Recharge if you have time and opportunity RED: battery voltage is below 12.4V = time for charging to prevent battery damage
I have a COMFORT INDICATOR connected to the battery all the time. Is there any risk of the battery discharging?
No, the purpose of the indicator is to allow you to quickly and easily see whether the battery must be charged, thereby reducing the risk of the battery being damaged because of being discharged. The COMFORT INDICATOR uses about 1.5mA. This would cause the battery to discharge only a few minutes faster than without the indicator.
I have a COMFORT INDICATOR connected to the battery in my car. The red lamp flashes even after I've fully charged the battery with my MULTI XS 3600/ MXS 3.6/Zafir 45/M45. Should it do this? I thought the COMFORT INDICATOR would be green when the battery is fully charged?
The CTEK COMFORT INDICATOR is exactly what the name says – an indicator. It provides a snapshot of the system voltage level and works best when the battery has reached a rest level (this can take up to a few hours after the battery was used). As soon as you open a car door or turn on the ignition, the COMFORT INDICATOR will show the actual status, which means that the voltage level will be temporarily indicated as yellow or even red. This is nothing to worry about. The COMFORT INDICATOR is working correctly. To make things easier, you can position the COMFORT INDICATOR where you can see it without having to unlock or use any voltage in the car.
COMFORT CONNECT CIG PLUG
Can I use your COMFORT CONNECT CIG PLUG to charge the battery through the cigarette socket in my car?
Yes, but you should check that you have voltage to the socket even if the vehicle is switched off. If, for example, you can charge a mobile phone or get a GPS to work when the car ignition is switched off, you can also charge the car battery this way.

Products

CTX BATTERY SENSE
How should I connect Battery Sense?
Connect the red positive (+) cable to the battery's positive pole, and the black negative (-) cable to an earthing point on the chassis. Check the vehicle's user manual for information about what is recommended for your vehicle.
What diameter are the eyelets on Battery Sense?
Battery Sense has M6 eyelets, i.e. 6 mm diameter.
Can I connect my charger to Battery Sense?
No, you cannot. You need a CTEK accessory – for more information see
http://ctek.com/gb/en/accessories/
How often does Battery Sense gather information from the battery?
Battery Sense measures the battery's voltage every five minutes and calculates its state of charge.
When does the information update in the app?
The information is shown in the app when your phone is within 10 metres of the sender. If you have the app open in the background, it collects data every 60 minutes if you are within 10 metres of the sender.
Can I force Battery Sense to update?
Yes, you can use the "Pull to refresh" function in the app, which gives you the latest measured values.
("Pull to refresh" = Swipe your finger downwards over the screen in list mode)
How should the negative cable be connected?
The black negative cable should be connected to an earthing point on the vehicle chassis (see your vehicle's user manual).
Does this affect the battery management system?
No.
How much battery power does it use?
It uses about 1 mA, equivalent to about 1 Ah per month. The normal rate of discharge from a battery is about 10 mA. If the vehicle is left unused for a long period we recommend that you charge the battery.
Can I place Battery Sense anywhere in the engine compartment?
You should place it so that it does not come into contact with moving, sharp, hot or otherwise unsuitable surfaces.
Which operating systems does it work on?
It works on Android OS 4.4 or higher
iPhone iOS 7 or higher, installed on iPhone 4S or later models.
How do I know whether I've got Bluetooth 4.0?
This is not generally obvious on your phone. Check with your phone retailer.
Why can't I find the app on Google Play? I have an Android phone
If you have an Android phone that doesn't support OS 4.4 or higher, the app won't be shown on Google Play.
Why can't I find the app on App Store? I have an iPhone 4
If you have an iPhone that doesn't support iOS 7 or higher, the app won't be shown on App Store.
Where can I find more information than what's shown in the manual?
For more information, see www.ctek.com
Can I connect more than one phone to Battery Sense?
Yes, you can connect up to 10 phones to the same sender.
Can I connect my phone to more than one Battery Sense?
Yes. The number of Battery Sense units you can connect to is only limited by your phone's memory.
Can I connect even if I've forgotten my serial number?
Yes – you must disconnect the sender from the battery for at least 30 seconds and then reconnect. Follow the "lost code" guide in the app.
Why doesn't Battery Sense show 100% when charging is complete?
Battery Sense measures the battery's voltage and calculates its state of charge (SOC). The calculation takes account of charging and discharging, and also makes assumptions about the battery's characteristics. Battery Sense is therefore not completely precise.
How can the battery's state of charge (SOC) increase even though I'm not charging or driving my vehicle?
Battery Sense adapts to the battery's resting voltage, which can increase when the battery is not under load.
How close to my vehicle should I be for the app to update?
The effective range may be less if there is an obstruction – for example a wall – in the way.
What does background updating involve?
Measurements are sent to your phone even when the app isn't active.
Why does background updating not work?
The app can be shut down if your phone is low on memory, for example. It's a good idea to activate the function in the app that notifies you if it hasn't been able to update during the last seven days.
Can I update manually?
Yes, you can update manually by using "Pull to refresh".
("Pull to refresh" = Swipe your finger downwards over the screen in list mode)
Can I be notified when the battery is fully charged again (green)?
No, you only get notifications when the battery's status changes as it discharges, to yellow or red.
What levels do the colour indications change at?
The status changes from green to yellow when the battery's state of charge drops below 58%, and from yellow to red when it goes below 35%.
Why doesn't the panel with a figure disappear from the Battery Sense icon?
The panel (iPhone) shows how many senders have yellow or red status or haven't been updated in the last seven days. The panel will disappear when the app has updated and/or the state of charge has changed to green.
Why doesn't Battery Sense work on older phones?
Bluetooth Low Energy is a relatively new technology which is not available on older phones. For iOS you need an iPhone 4S or newer and iOS 7 or later. For Android you need version 4.4 (KitKat).
Does Battery Sense work on my tablet?
Battery Sense has not been developed specifically for tablets but it should work if the OS version and hardware support Bluetooth 4.0 (BLE). The app is only shown among iPhone apps, not iPad apps.
There are three Bluetooth classes. Which does Battery Sense belong to?
Battery Sense is Class 2.
CT5 POWERSPORT
What is POWERSPORT all about?
POWERSPORT vehicles are defined as sport-related motor vehicles where the driver is exposed to the elements, such as motorcycles, jet skis and quadbikes.
What is CAN bus?
Put simply, CAN bus is an internal communications system in the vehicle.
How do I know whether I've got CAN bus in my vehicle?
Check with your retailer or in the vehicle manual.
When is the CAN bus signal sent that opens the 12 V socket for charging?
The opening signal is sent in three situations:
a. when the cable is connected to the power socket. It's therefore important to connect the contact to the battery first.

b. when the user changes programme or cycles through the charging modes by pressing the Mode button.

c. when four weeks have passed since any interruption in the previous charging session.

We have chosen a "restart interval" of four weeks in order to look after the battery in the best way, and to avoid starting bulk charging too often, which can overload the battery.
What's the difference between POWERSPORT and other chargers?
POWERSPORT has an inbuilt function that opens the 12 V outlet's CAN bus system. POWERSPORT has three visible modes – Check, Charge and Care – which show where the charger is in the programme and what it's currently doing, i.e. checking battery condition, charging or caring (maintaining).
Can I use POWERSPORT as a standard charger for vehicles that don't have CAN bus?
Yes, you can use POWERSPORT to both charge and maintain the charge in any vehicle with 5-25 Ah 12 V lead-acid batteries.
Can I connect a POWERSPORT for long-term maintenance?
Yes, you can. When the charger has completed charging, it switches automatically to long-term maintenance (Care).
Where can I find more information?
For more information, see www.ctek.com and search for CT5 POWERSPORT.
How do I connect POWERSPORT to vehicles with a 12 V outlet?
Connect the charger first to the vehicle's 12 V outlet, and then to the power socket. This is important as it ensures that the CAN bus port is opened.
How do I connect POWERSPORT to vehicles without a 12 V outlet?
Batteries installed in vehicles should be connected according to the user manual. Connect the positive clamp (or eyelet) to the battery's positive pole (or positive charger terminal), and the negative clamp (or eyelet) to the chassis (or negative charger terminal). With a free-standing battery, connect the positive clamp to the positive pole and the negative clamp to the negative pole. Then connect the power cable to the power outlet.

Choose the required programme by pressing the Mode button, and the first light, "Check" shows. Charging is now under way.
Can I charge my ride-on lawnmower with POWERSPORT?
Yes, you can, if it has a 12 V lead-acid battery between 5 and 25 Ah in size.
Does POWERSPORT come with a CTEK Cig Plug accessory?
No, Comfort Connect Cig Plug is an accessory available at most well-equipped car accessory shops. POWERSPORT comes with 6 mm diameter Comfort Connect Eyelet M6 eyelets, as well as Comfort Connect Clamps.

You can also use Comfort Indicator Cig Plug.
Can I charge my gel battery with POWERSPORT?
Yes – use Normal mode.
Can I charge my car battery with POWERSPORT?
POWERSPORT is for batteries between 5 and 25 Ah in size. Car batteries are usually larger than this. We therefore recommend a larger charger for car batteries.
Is POWERSPORT a simpler charger than the MXS 5.0? It has only three lights while the MXS 5.0 has eight.
No. Both chargers contain an eight-stage charging programme, but they show this differently. On the MXS 5.0 a light shows for every step, and the voltage and power curve is shown above and below the lights. On the POWERSPORT we've chosen to reduce the number of lights and instead just show which phase the charger is currently in – Check, Charge or Care. However, MXS 5.0 is a more powerful charger than POWERSPORT.
If I choose Recond, how do I know when it's finished?
Reconditioning is activated by pressing the Mode button and selecting "Recond". When the charger is in "Care" mode it also means that the reconditioning is complete.
Can I use POWERSPORT with my moped?
Yes, if your moped has a 12 V lead-acid battery between 5 and 25 Ah in size.
The charger has switched to error mode. What could the problem be?
1. First check that the charger is connected correctly. Check that the positive clamp (or eyelet) is connected to the battery's positive pole (or the positive charger terminal) and the negative clamp (or eyelet) is connected to the chassis (or the negative charger terminal), and not the other way round.

2. To exclude the possibility of a problem with the charger, test it on another battery.

3. The charger may have discovered a problem inside the battery. The charger will try repeatedly to continue, but if it cannot, it will switch over to error mode.

Depending on where in the programme the charger has stopped, it is possible to identify a number of causes. If the Check light and Error indicator (!) are both lit at the same time, try restarting the charging cycle with the Mode button. If it stops again at the same point, the battery is sulphated and probably needs to be replaced. There can be other problems with the battery that mean that the charger cannot go beyond Check mode.

If the charger enters error mode when "Charge" is lit, it is due to a problem with the battery's ability to retain charge. This can also happen if the loads on the battery are too great, making the voltage decrease too quickly. Disconnect these loads and try again.
The charger is correctly connected to the 12 V outlet but won't start. Is there something wrong with it?
No, probably not. If the CAN bus system has closed the 12 V outlet, you need to press the Mode button to open the port again.
POWERSPORT is correctly connected to the vehicle 12 V outlet and has charged for a while. Now the Power light is flashing. What does this mean?
The vehicle's CAN bus port is closed. The charger is waiting to start the next charging cycle. It will then open the CAN bus port again and continue with the selected programme.
Does POWERSPORT have a temperature sensor?
No.
How do I know the battery is fully charged?
When the green "Care" light shows, the battery is fully charged.
What do the three stages on the charger mean?
Check mode means that the charger is checking the batteries state of health and preparing to charge. If the battery is in good condition, the Check stage doesn't take more than a few moments.

The Charge mode LED shows while the charger is filling the battery, and Care shows when the battery is fully charged and the charger has automatically switched over to maintenance charging.
If I choose Recond, how do I know when it's finished?
When the charger is in "Care" mode it also means that the reconditioning is complete. Reconditioning is activated by pressing the Mode button and selecting "Recond".
CT5 TIME TO GO
Why is TIME TO GO recommended for 20 Ah and upwards?
The estimation of time remaining is less accurate with lower-capacity batteries.
How do I know the battery is fully charged?
When the green "Care" light shows, the battery is fully charged.
How should I connect TIME TO GO?
Batteries installed in vehicles should in the first instance be connected according to the vehicle's user manual. If the manual is not available, connect the positive clamp (or eyelet) to the battery's positive pole (or positive charger terminal), and the negative clamp (or eyelet) to the chassis (or negative charger terminal). With a free-standing battery, connect the positive clamp to the positive pole and the negative clamp to the negative pole.
If I choose Recond, how do I know when it's finished?
When the charger is in "Care" mode it also means that the reconditioning is complete. Reconditioning is activated by pressing the Mode button and selecting "Recond".
I can't guarantee that I will be at home when the charger says it's finished. Should I disconnect it and continue charging when I come home?
No, you don't have to monitor on the charger. It will automatically switch to maintenance mode and keep the battery fully charged until you return.
If you want to leave the battery in maintenance mode long term, you should make sure that the charger has successfully charged the battery and that the "Care" light is showing.
Why is the charger called TIME TO GO?
Because it shows how much ‘time to go’ before charging is complete.
The charger has switched to error mode. What could the problem be?
1. First check that the charger is connected correctly. Check that the positive clamp (or eyelet) is connected to the battery's positive pole (or the positive charger terminal) and the negative clamp (or eyelet) is connected to the chassis (or the negative charger terminal), and not the other way round.
2. The charger has discovered a problem inside the battery. The charger will try repeatedly to continue, but if it can't, it will switch over to error mode. Causes can include cell faults, sulphation or the battery's capacity to retain charge.
Try first to restart the programme by pressing the Mode button. Error mode can also be shown if the loads on the battery are too great, making the voltage decrease too quickly. Disconnect these loads and try again.
3. Test the charger on another battery to exclude the possibility of a charger fault.
What does "CARE" mean?
This means that the battery is now fully charged and that the charger has switched to maintenance mode.
What does "GO" mean?
This means that the battery is over 80% charged and the vehicle can be started. We recommend that you complete charging at the first possible opportunity.
What does the "TRY" lamp mean?
When the "TRY" LED is lit, it means that you can try to start the vehicle ONCE if you're in a hurry. At that point the battery is charged to about 30–40% capacity, and it should be charged fully at the first possible opportunity.
How does TIME TO GO estimate remaining time?
TIME TO GO estimates the remaining charging time by analysing the battery voltage and its capacity to accept charge.
TIME TO GO doesn't have a "snowflake setting". Can I use it during the winter?
Yes – it has a temperature sensor that regulates the output voltage according to the ambient temperature.
Can I use the charger on my boat batteries?
YES, you can, if you have 12 V lead-acid batteries. Note that TIME TO GO is optimized for batteries from 20 to 90 Ah (up to 160 Ah for long term maintenance).
How many amps does TIME TO GO provide?
It provides a maximum of 5 A and varies according to the needs of the battery.
Can I use the charger for long term maintenance?
Yes, you can. The charger switches automatically to maintenance charging when the battery is fully charged.
I have a ride-on lawnmower. Can I use TIME TO GO to charge it?
Yes, you can, if you have a 12 V lead-acid battery. Note that TIME TO GO is optimized for batteries of 20 Ah upwards, so if your battery has a lower capacity than 20 Ah you should use a different charger, such as an MXS 3.8.
What is the difference between TIME TO GO and an MXS 5.0 charger?
TIME TO GO has a different display. Instead of the various charging steps, you see a display that counts down the time left until the battery can be used.
CT5 START/STOP
What's new about the START/STOP charger?
START/STOP has been developed for modern cars with a start-stop system. It's simple to use as it doesn't have a programme button (mode button) – it starts working as soon as it's connected to a battery and is plugged into a wall socket. It's also easy to understand, as it only has three LEDs which show which phase it's currently in: Check, Charge or Care.
I have an AGM battery but my car doesn't have a start-stop system. Can I still charge the battery with a START/STOP charger?
Yes, you can.
Can I charge a standard car battery that is not installed in a start-stop car?
Yes. START/STOP is optimized for use with 12 V EFB (Enhanced Flooded Battery) and AGM batteries, but it can charge ordinary 12 V lead-acid batteries as well.
What do the three stages on the charger mean?
Check mode means that the charger is checking the battery’s state of health and preparing to charge. If the battery is in good condition, the Check stage doesn't take more than a few moments.
The Charge mode LED shows while the charger is filling the battery, and Care shows when the battery is fully charged and the charger has automatically switched over to maintenance charging.
Is the START/STOP a simpler charger than the MXS 5.0? It has only three lights while the MXS 5.0 has eight.
No. On the MXS 5.0 a light shows for every step, and the voltage and power curve is shown above and below the lights. On the START/STOP we've chosen to reduce the number of lights and instead just show which phase the charger is currently in – Check, Charge or Care. START/STOP has no programme selection. Instead, when it is in contact with a battery it starts as soon as it's plugged into a wall socket.
Can I charge my battery through the cigarette lighter socket?
If your cigarette lighter socket is connected to the battery even when the ignition isn't on, you can charge the battery that way. You need a Comfort Connect Cig plug or a Comfort Indicator Cig plug for this.
How should I connect the charger? My car has BMS (Battery Management System)
Connect the red clamp (or eyelet) to the battery's positive (+) pole. You can connect the black negative (-) clamp (or eyelet) to the chassis or a recommended earthing point.
How many amps does START/STOP provide?
It provides a maximum of 3.8 A and varies according to the needs of the battery.
Can I use the charger during the winter? It doesn't have a winter setting.
Yes, you can use the charger during the winter, as it has an inbuilt temperature sensor which regulates the output voltage depending on the ambient temperature.
Does START/STOP have temperature compensation?
Yes.
How do I know the battery is fully charged?
When the green "Care" light shows, the battery is fully charged.
The charger has switched to error mode. What could the problem be?
1. First check that the charger is connected correctly. Check that the positive clamp (or eyelet) is connected to the battery's positive pole (or the positive charger terminal) and the negative clamp (or eyelet) is connected to the chassis (or the negative charger terminal), and not the other way round.

2. To exclude the possibility of a problem with the charger, test it on another battery.

3. The charger may have discovered a problem inside the battery. The charger will try repeatedly to continue, but if it cannot, it will switch over to error mode. Depending on where in the programme the charger has stopped, it is possible to identify a number of causes. If the Check light and Error indicator (!) are both lit at the same time, try restarting the charging cycle by unplugging the charger from the outlet and plugging it in again. If it stops again at the same point, the battery is sulphated and probably needs to be replaced. There can be other problems with the battery that mean that the charger can't go beyond Check mode.
If the charger enters error mode when "Charge" is lit, it is due to a problem with the battery's ability to retain charge. This can also happen if the loads on the battery are too great, making the voltage decrease too quickly. Disconnect these loads and try again.
MXS 3.6
No LED is lit when the charger is connected only to the battery
Explanation: The charger requires voltage from the battery for the Standby LED to be lit.
Test: Connect the charger to a fresh battery.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED is lit when the charger is connected to both the power outlet and the battery
Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test against another battery that is fresh.
The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.

Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging should be completed. If the voltage is under 14,1V the battery is most likely faulty.
Test: Try the charger on another fresh battery.
and is lit (flashing rapidly) simultaneously
Explanation 1: Bad connection.
Test: Move the clamps and make sure there is no loose connection in the quick connector, Comfort Connect.

Explanation 2: The charger is working in the desulphation phase.
Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in a very poor condition.
switches to after the charge has been stopped
Explanation: When the charger restarts the battery voltage is monitored. If the voltage is above 12,9V, the charging will not commence. When the battery is between 12,9V and 14,4V it is seen as fully charged. The charging will automatically start again when the battery voltage drops below 12,9V.
The charger goes into Standby mode after the power is cut and the charging does not start again
Explanation: The charger will turn into Standby if the voltage in the battery is below 6V when the power is back on.
/ Test: Start the charging again by pressing on the mode button.
The error LED is lit
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.
I have a MXS 3.6/ M45/Zafir 45: The light which indicates 'charging' is lit. The green lamp lights if I press the MODE button repeatedly or if I temporarily cut-off the mains power.
Yes, this is quite right. The battery was charged to more than 90% but not 100% fully charged when charging was interrupted. Explanation: When you start charging a battery, the 'charging' lamp lights until the battery is 100% fully charged. Then the green 'fully charged' lamp lights. The green lamp lights when the charger switches over to 'maintenance charging'. The charger continues in this mode until the voltage of the battery falls below 90% fully charged. The orange 'charging' lamp then lights again and the battery is charged up to 100% again..and again.. The charger restarts and checks how charged the battery is, if you press the MODE button or cut-off the mains power before the battery is fully charged. If the battery is more than 90% charged, then the green 'fully charged' lamp will light. The green light continues to be lit until the voltage falls below 90%. Charging the starts again as described above.
A supplier only recommends MXS 3.6 up to 75Ah, while it says 120Ah on the box. Why?
New answer. MXS 3.6 works excellently also up to 120Ah. But the MXS 3.6 can seem a bit too slow if the 120Ah is flat and you need to charge it quickly. The less time you have to charge the battery, then the larger the charger you should choose. For example the MXS 7.0 or MXS 10. (This is primarily a weighing up of price and performance.)
M200
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for M200 and M300 (500Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a faulty cell in the battery.
Test: Change the battery.
is flashing, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The clamps are short circuited in Supply mode.
Test: Separate the clamps.
Temperature LED is lit
Please note that the function of temperature sensor has changed for M200 and M300. The charger will indicate differently depending on when it was purchased.

Explanation M200 and M300 purchased before 2011: DC interruption or short circuit in the cable.

Explanation M200 and M300 purchased from 2012 and later: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation M200 and M300 purchased from 2012 and later: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
MULTI XS 25000
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for MXS 25 and Multi XS 25000 (500Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a faulty cell in the battery.
Test: Change the battery.
is flashing, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The clamps are short circuited in Supply mode.
Test: Separate the clamps.
Temperature LED is lit
Explanation Multi XS 25000: DC interruption or short circuit in the cable.

Explanation MXS 25: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
MULTI XT 14000
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 7V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 25,5V after 4h the charger will go into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the capacity of the chargers.
Test: Make sure that the battery/batteries are not larger than the recommendations for XT 14000 / Multi XT 14000 (500Ah).
Test: Try to restart the charger because the charger might need some more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a defective cell in the battery.
Test: Change the battery.
is flashing, then turns
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge provided.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.
Temperature LED is lit
Explanation Multi XT 14000: DC interruption or short circuit in the cable.

Explanation MXT 14: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
M45
The light which indicates 'charging' is lit. The green lamp lights if I press the MODE button repeatedly or if I temporarily cut-off the mains power.
Yes, this is quite right. The battery was charged to more than 90% but not 100% fully charged when charging was interrupted. Explanation: When you start charging a battery, the 'charging' lamp lights until the battery is 100% fully charged. Then the green 'fully charged' lamp lights. The green lamp lights when the charger switches over to 'maintenance charging'. The charger continues in this mode until the voltage of the battery falls below 90% fully charged. The orange 'charging' lamp then lights again and the battery is charged up to 100% again..and again.. The charger restarts and checks how charged the battery is, if you press the MODE button or cut-off the mains power before the battery is fully charged. If the battery is more than 90% charged, then the green 'fully charged' lamp will light. The green light continues to be lit until the voltage falls below 90%. Charging the starts again as described above.
No LED is lit when the charger is connected only to the battery
Explanation: The charger requires voltage from the battery for the Standby LED to be lit.
Test: Connect the charger to a fresh battery.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED is lit when the charger is connected to both the power outlet and the battery
Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test against another battery that is fresh.
The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.

Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging should be completed. If the voltage is under 14,1V the battery is most likely faulty.
Test: Try the charger on another fresh battery.
and is lit (flashing rapidly) simultaneously
Explanation 1: Bad connection.
Test: Move the clamps and make sure there is no loose connection in the quick connector, Comfort Connect.

Explanation 2: The charger is working in the desulphation phase.
Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in a very poor condition.
switches to after the charge has been stopped
Explanation: When the charger restarts the battery voltage is monitored. If the voltage is above 12,9V, the charging will not commence. When the battery is between 12,9V and 14,4V it is seen as fully charged. The charging will automatically start again when the battery voltage drops below 12,9V.
The charger goes into Standby mode after the power is cut and the charging does not start again
Explanation: The charger will turn into Standby if the voltage in the battery is below 6V when the power is back on.
/ Test: Start the charging again by pressing on the mode button.
The error LED is lit
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.
M300
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for M200 and M300 (500Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a faulty cell in the battery.
Test: Change the battery.
is flashing, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The clamps are short circuited in Supply mode.
Test: Separate the clamps.
Temperature LED is lit
Please note that the function of temperature sensor has changed for M200 and M300. The charger will indicate differently depending on when it was purchased.

Explanation M200 and M300 purchased before 2011: DC interruption or short circuit in the cable.

Explanation M200 and M300 purchased from 2012 and later: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation M200 and M300 purchased from 2012 and later: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
MULTI XS 25000 EXTENDED
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for MXS 25 and Multi XS 25000 (500Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a faulty cell in the battery.
Test: Change the battery.
is flashing, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The clamps are short circuited in Supply mode.
Test: Separate the clamps.
Temperature LED is lit
Explanation Multi XS 25000: DC interruption or short circuit in the cable.

Explanation MXS 25: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
MXS 25
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for MXS 25 and Multi XS 25000 (500Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a faulty cell in the battery.
Test: Change the battery.
is flashing, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The clamps are short circuited in Supply mode.
Test: Separate the clamps.
Temperature LED is lit
Explanation Multi XS 25000: DC interruption or short circuit in the cable.

Explanation MXS 25: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
MXS 25EC
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the chargers capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for MXS 25 and Multi XS 25000 (500Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a faulty cell in the battery.
Test: Change the battery.
is flashing, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The clamps are short circuited in Supply mode.
Test: Separate the clamps.
Temperature LED is lit
Explanation Multi XS 25000: DC interruption or short circuit in the cable.

Explanation MXS 25: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
MXT 14
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 7V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 25,5V after 4h the charger will go into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the capacity of the chargers.
Test: Make sure that the battery/batteries are not larger than the recommendations for XT 14000 / Multi XT 14000 (500Ah).
Test: Try to restart the charger because the charger might need some more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a defective cell in the battery.
Test: Change the battery.
is flashing, then turns
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charge given.

Explanation 1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge provided.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.
Temperature LED is lit
Explanation Multi XT 14000: DC interruption or short circuit in the cable.

Explanation MXT 14: This is normal, the LED is on indicating that the temperature sensor is activated. If the LED is turned off here is a DC interruption or short circuit in the cable.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The charging is interrupted. Press the MODE button to restart charging when the temperature has dropped below + 65 °C.
ZAFIR 45
The light which indicates 'charging' is lit. The green lamp lights if I press the MODE button repeatedly or if I temporarily cut-off the mains power.
Yes, this is quite right. The battery was charged to more than 90% but not 100% fully charged when charging was interrupted. Explanation: When you start charging a battery, the 'charging' lamp lights until the battery is 100% fully charged. Then the green 'fully charged' lamp lights. The green lamp lights when the charger switches over to 'maintenance charging'. The charger continues in this mode until the voltage of the battery falls below 90% fully charged. The orange 'charging' lamp then lights again and the battery is charged up to 100% again..and again.. The charger restarts and checks how charged the battery is, if you press the MODE button or cut-off the mains power before the battery is fully charged. If the battery is more than 90% charged, then the green 'fully charged' lamp will light. The green light continues to be lit until the voltage falls below 90%. Charging the starts again as described above.
No LED is lit when the charger is connected only to the battery
Explanation: The charger requires voltage from the battery for the Standby LED to be lit.
Test: Connect the charger to a fresh battery.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED is lit when the charger is connected to both the power outlet and the battery
Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test against another battery that is fresh.
The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.

Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging should be completed. If the voltage is under 14,1V the battery is most likely faulty.
Test: Try the charger on another fresh battery.
and is lit (flashing rapidly) simultaneously
Explanation 1: Bad connection.
Test: Move the clamps and make sure there is no loose connection in the quick connector, Comfort Connect.

Explanation 2: The charger is working in the desulphation phase.
Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in a very poor condition.
switches to after the charge has been stopped
Explanation: When the charger restarts the battery voltage is monitored. If the voltage is above 12,9V, the charging will not commence. When the battery is between 12,9V and 14,4V it is seen as fully charged. The charging will automatically start again when the battery voltage drops below 12,9V.
The charger goes into Standby mode after the power is cut and the charging does not start again
Explanation: The charger will turn into Standby if the voltage in the battery is below 6V when the power is back on.
/ Test: Start the charging again by pressing on the mode button.
The error LED is lit
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.
XC 0.8
When I start charging, the green diode lights steadily and the orange diode flashes quickly. What does this mean?
This can be due to several reasons: 1) Poor contact. Twist the connectors a little. Check that Comfort Connect (or the white plastic contact on the charge cable) is fully home. Also check that contact with the battery is good and that the poles are clean. 2) Sulphated battery is a likely explanation. CTEK chargers have a unique feature for dealing with this. An insulating layer of lead sulphate has formed internally in sulphated batteries. The layer is not fully continuous, as it is still possible to measure a voltage across the battery. The charger, in this situation, pulses out a little energy until the battery starts to receive charging. Batteries which 'do not receive charging' can often be woken in this way. Let the charger charge for an hour. If the charger still flashes, then the battery is probably dead and must be replaced. If the yellow or green lamps light, then you have managed to wake the battery and will probably function. But it is at the end of its life. Chargers which charge using 5A or more trigger alarms (the error lamp lights) if desulphating has continued for more than four hours. This is also to remind you that the remaining battery life is very short. The sulphate crystals are large and no charger in the world can break them down. 3) Fault in battery cell. If a battery starts charging normally as indicated by the orange lamp being lit but which then begins to flash, then this is due to an interruption somewhere. The easiest cause of this is where the connection has fallen off. But it can also be due to an interruption inside the battery. Set the charger in OFF/STANDBY mode and then back to charging. If it is an interruption, then charging does not start.
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: The charger has to be connected to battery for the LED’s to light up.
No LED is lit when the charger is connected to both the power outlet and the battery
Explanation: The battery voltage could be under 4V.
Test: Test against another battery that is fresh.
The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.

Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging is completed. If the voltage is under 7V the battery is probably faulty.
Test: Try the charger on another fresh battery.
and is lit (flashing rapidly) simultaneously and there is a ticking sound
Explanation 1: Bad connection.
Test: Move the clamps and make sure there is no loose connection in the quick connector, Comfort Connect.

Explanation 2: The charger is working in the desulphation phase.
Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in very poor condition.
switches to after the charge has been stopped
Explanation: When the charger restarts the battery voltage is monitored. If the battery voltage is above 6,5V, the charging will not commence. When the battery is between 6,5V and 7,2V it is considered as fully charged. The charging will automatically start again when the battery voltage drops below 6,5V.
The error LED is lit
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.
MULTI XS 3600
No LED is lit when the charger is connected only to the battery
Explanation: The charger requires voltage from the battery for the Standby LED to be lit.
Test: Connect the charger to a fresh battery.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED is lit when the charger is connected to both the power outlet and the battery
Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test against another battery that is fresh.
The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.

Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging should be completed. If the voltage is under 14,1V the battery is most likely faulty.
Test: Try the charger on another fresh battery.
and is lit (flashing rapidly) simultaneously
Explanation 1: Bad connection.
Test: Move the clamps and make sure there is no loose connection in the quick connector, Comfort Connect.

Explanation 2: The charger is working in the desulphation phase.
Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in a very poor condition.
switches to after the charge has been stopped
Explanation: When the charger restarts the battery voltage is monitored. If the voltage is above 12,9V, the charging will not commence. When the battery is between 12,9V and 14,4V it is seen as fully charged. The charging will automatically start again when the battery voltage drops below 12,9V.
The charger goes into Standby mode after the power is cut and the charging does not start again
Explanation: The charger will turn into Standby if the voltage in the battery is below 6V when the power is back on.
/ Test: Start the charging again by pressing on the mode button.
The error LED is lit
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.
MXS 10
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.
Temperature LED is lit
Explanation: This led is turned on automatically when the temp sensor is connected.
Temperature LED is not lit
Explanation: The temperature sensor is disconnected or has been damaged. The charger will assume room temperature and charge without temperature compensation.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The current is reduced until the temperature has dropped below + 65 °C. The charger reverts to normal charging current when the temperature drops below + 65 °C.
MXS 10EC
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.
Temperature LED is lit
Explanation: This led is turned on automatically when the temp sensor is connected.
Temperature LED is not lit
Explanation: The temperature sensor is disconnected or has been damaged. The charger will assume room temperature and charge without temperature compensation.
Temperature LED is flashing
Explanation: The temperature is above + 65 °C. The current is reduced until the temperature has dropped below + 65 °C. The charger reverts to normal charging current when the temperature drops below + 65 °C.
XS 800
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: The charger has to be connected to battery for the LED’s to light up.
No LED is lit when the charger is connected to both the power outlet and the battery
Explanation: The battery voltage could be under 6V.
Test: Test against another battery that is fresh.
The charger does not switch from into maintenance charging
Explanation 1: Larger loads are connected to the battery at the same time.
Test: Disconnect the loads from the battery and try to charge again.

Explanation 2: Defective battery.
Test: If possible, measure the voltage on the battery when the charging should be finished. If the voltage is under 7V the battery is most likely faulty.
Test: Try the charger on another fresh battery.
and is lit (flashing rapidly) simultaneously and there is a ticking sound
Explanation 1: Bad connection.
Test: Move the clamps and make sure there is no loose connection in the quick connector, Comfort Connect.

Explanation 2: The charger is working in the desulphation phase.
Test: Leave the charger to charge for 24h (with some supervision). If the charger does not start charging (one of the LED’s are lit) within 24h the battery is in a very poor condition.
switches to after the charge has been stopped
Explanation: When the charger restarts the battery voltage is monitored. If the battery voltage is above 12,9V, the charging will not commence. When the battery is between 12,9V and 14,4V it is considered as fully charged. The charging will automatically start again when the battery voltage drops below 12,9V.
The error LED is lit
Explanation: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the - cable/clamp is connected to the - terminal.
MULTI XS 7000
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the lowest row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased in the way it should have done.

Explanation 1: The battery is too large in relation to the capacity of the charger.
Test: Make sure that the battery/batteries size is not larger than the recommendations for Multi XS 7000 (225Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely due to a defective cell in the battery.
Test: Change the battery.
is flashing for 4 hours, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charger given.

Explanation 1: Large loads are connected to the battery and are draining the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: The clamps are short circuited.

Explanation 3: For chargers of the older type the error mode is flashing when only the plug is connected.
MULTI XT 4000
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the lowest row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 25,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the charger capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for Multi XT 4000 (100Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a defective cell in the battery.
Test: Change the battery.
is flashing, then turns
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charger given.

Explanation 1: Large loads are connected to the battery and draining the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charger given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: The clamps are short circuited.

Explanation 3: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.
MXTS 70
No LED or display is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s and the displays to be lit.
No LED or display is lit when the charger is connected only to the power outlet
Explanation: The displays and LED’s should light up when the charger is connected to the power outlet. The fans should also turn on.
Test: Make sure that there is power from the power outlet.
is lit
Explanation: This led is lit when the charger has been set to a current less than the maximum.
is lit
Explanation: This led is lit when the charging has been stopped or not started. Press the START/PAUSE button to start or resume.
is lit
This indication always has an explanation in the Ah & info display.

E01: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the - cable/clamp is connected to the - terminal.

E02: Over voltage. The battery connected has a higher voltage than the selected charge program.
Test: Make sure that the battery and the selected charge program corresponds to each other.

E03: Time out step 1: Desulphation. The battery is sulphated and can´t be charged correct.
Test: Try to restart the charge cycle, if it still fails in step 1 the battery is sulphated and needs to be replaced.

E04: Time out step 2. Soft start. The battery can´t be charged correct.
Test: Try to restart the charge cycle, if it still fails in step 1 the battery is sulphated and needs to be replaced.

E05: Analyze. The charger can´t keep the charge.
Test: Remove all parallel loads on the battery and restart the charge cycle. If the analyze fails again the battery needs to be replaced.

E06: battery overheated. The charger has detected a too warm battery, over + 60 °C. Push Pause/Start to resume charging when temperature is below.
Test: Make sure that it is not the ambient that is too warm. If that is not the case the battery need to be replaced.

E07: Low battery voltage in supply program. The battery connected has too low voltage to continue. The battery connected is either a 12V and the charger is in 24V mode or the parallel loads are too high.
Test: If a 12V battery is connected check if the unit is in 24V mode. Try to remove all parallel loads.

E08: Over current in supply. The charger has switched off the output due to too high current.
Test: Make sure that the clamps not are shortened. Also check if there are massive parallel loads on the battery.

E99: Over voltage protection. If battery voltage is below 17V the ERROR LED is lit when 24V mode has been selected.
Press the START/PAUSE button to proceed with in 12V mode. To change to 24V mode press INCREASE or DECREASE.
Temperature LED is lit
Explanation: This led is turned on automatically when the temp sensor is connected.
Temperature LED is not lit
Explanation: The temperature sensor is disconnected or has been damaged. The charger will assume room temperature and charge without temperature compensation.
MXS 7.0
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the lowest row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased in the way it should have done.

Explanation 1: The battery is too large in relation to the capacity of the charger.
Test: Make sure that the battery/batteries size is not larger than the recommendations for Multi XS 7000 (225Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely due to a defective cell in the battery.
Test: Change the battery.
is flashing for 4 hours, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charger given.

Explanation 1: Large loads are connected to the battery and are draining the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: The clamps are short circuited.

Explanation 3: For chargers of the older type the error mode is flashing when only the plug is connected.
M100
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the lowest row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased in the way it should have done.

Explanation 1: The battery is too large in relation to the capacity of the charger.
Test: Make sure that the battery/batteries size is not larger than the recommendations for Multi XS 7000 (225Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely due to a defective cell in the battery.
Test: Change the battery.
is flashing for 4 hours, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charger given.

Explanation 1: Large loads are connected to the battery and are draining the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: The clamps are short circuited.

Explanation 3: For chargers of the older type the error mode is flashing when only the plug is connected.
MXT 4.0
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the lowest row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 25,5V after 4h the charger will turn into error mode, because the voltage has not increased the way it should have done.

Explanation 1: The battery is too large in relation to the charger capacity.
Test: Make sure that the battery/batteries are not larger than the recommendations for Multi XT 4000 (100Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charging, the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely a defective cell in the battery.
Test: Change the battery.
is flashing, then turns
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charger given.

Explanation 1: Large loads are connected to the battery and draining the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charger given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: The clamps are short circuited.

Explanation 3: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.
ZAFIR 100
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s at the lower row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the lowest row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Try to charge the battery in Supply mode for approximately 5 min. Then try regular charging.
Test: Test the charger on a fresh battery.
is lit for 4 hours and then turns into error mode
If the battery voltage is not above 12,5V after 4h the charger will turn into error mode, because the voltage has not increased in the way it should have done.

Explanation 1: The battery is too large in relation to the capacity of the charger.
Test: Make sure that the battery/batteries size is not larger than the recommendations for Multi XS 7000 (225Ah).
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 2: Larger loads are connected to the battery.
Test: Disconnect the battery and try to charge it without the loads.
Test: Try to restart the charger because the charger might need more time to charge the battery.

Explanation 3: If the battery is warm and/or is boiling heavily during the charging, it is most likely due to a defective cell in the battery.
Test: Change the battery.
is flashing for 4 hours, then turns into error mode
Explanation: The battery is probably too sulphated to revive. The battery is faulty and it is time to change it.
is lit and then turns into error mode
The analysis phase is testing if the battery can retain the charger given.

Explanation 1: Large loads are connected to the battery and are draining the voltage.
Test: Disconnect the battery and try charging again.

Explanation 2: The battery cannot retain the charge given.
Test: The battery needs replacing.
The error LED is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: The clamps are short circuited.

Explanation 3: For chargers of the older type the error mode is flashing when only the plug is connected.
XS 0.8
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2+/-0.5V.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 4.
Test: Test to restart the charge cycle, if it still fails in step 4 the battery is can’t be charged and needs to be replaced.
MXS 4003
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.
MXS 5.0 (black mode button)
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.
MXS 5.0 POLAR
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.
MXS 5.0 TEST&CHARGE
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.
MXS 5.0 CHECK
No LED is lit when the charger is connected only to the battery
Explanation: The plug has to be connected for the LED’s to be lit.
No LED is lit when the charger is connected only to the power outlet
Explanation: One of the LED’s in the bottom row should light up when the charger is connected to the power outlet.
Test: Make sure that there is power from the power outlet.
No LED’s are lit on the top row when the charger is connected to both the power outlet and the battery
The LED’s on the bottom row are lit and you can change charging mode. None of the LED’s in the top row, indicating charging status, are lit.

Explanation: The battery voltage could be under 2 +/- 0.5V.
Test: Test the charger on a fresh battery.
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.
MXS 5.0 (red mode button)
is flashing
If no battery or if the battery voltage is too low the led will start to flash to indicate the unit has entered power save mode.
Test: Test the charger on a fresh battery.
is lit
Explanation 1: Reverse polarity.
Test: Make sure that the + cable/clamp is connected to the + terminal and the – cable/clamp is connected to the – terminal.

Explanation 2: Loads are connected to the battery which requires more power than the charger can provide.
Test: Turn off or disconnect the loads when charging.

Explanation 3: The charger is not connected to a 12V battery.
Test: Test with a fresh 12V battery.

Explanation 4: The charge cycle is interrupted in step 1.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 1 the battery is sulphated and needs to be replaced.

Explanation 5: The charge cycle is interrupted in step 2.
Test: Test to restart the charge cycle with the mode button, if it still fails in step 2 the battery is can’t be charged and needs to be replaced.

Explanation 6: The charge cycle is interrupted in step 5.

Explanation 6.1: Large loads are connected to the battery and drain the voltage.
Test: Disconnect the loads and try charging again.

Explanation 6.2: The battery cannot retain the charge provided.

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