MayPole MP7428 Quick setup guide

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MP7428 12V 8A Electronic Smart Charger
Instruction and Information Manual
In order to ensure correct and safe usage of your battery charger, you should read these
instructions carefully. Please retain these instructions for future reference.
SAFETY
Ensure that cables are regularly inspected and kept in good condition.
Never use the battery charger if the mains lead, mains plug, output lead or crocodile clips are
damaged.
Never use the battery charger if it has been dropped or damaged in any way.
WARNING: Battery charging produces explosive gases. Prevent flames and sparks. Provide
adequate ventilation during charging.
Keep the charging area completely clear of combustible materials.
For indoor use only, do not expose to rain or any other forms of liquid or moisture.
The charger must not be used as a continuous DC power source or for any purposes other than those
listed.
The charger is designed to charge Lead-Acid & AGM batteries only and must not be used for the
charging of non-rechargeable batteries. Never attempt to charge a frozen battery.
There are no user-serviceable parts in this product other than the fuse in the mains plug. Opening the
case is dangerous and electrical repairs or replacement of the mains cable should only be carried out
by the manufacturer, its service agent or a suitably qualified electrician / electrical technician in order
to avoid a hazard. Resultant damage to the product will result in the loss of your guarantee.
GENERAL SAFETY
This appliance is not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety. Children must be
supervised to ensure that they do not play with the appliance. Cleaning and user maintenance must not be
undertaken by children without supervision.
Gases: The charging process produces flammable and explosive gases - the area in which charging takes
place should be kept well ventilated. Only connect and disconnect the battery leads when the mains supply
is disconnected. Avoid flames or sparks! Do not smoke!
Cables: Make sure mains lead is located so that it will not be stepped on, tripped over, or otherwise subjected
to damage. An extension cord should not be used unless absolutely necessary. Improper use of an extension
cord could result in a risk of fire and electric shock. If an extension cord must be used, make sure it is in good

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electrical condition.
Short circuit: Batteries store large amounts of energy. Avoid short circuits which could result in a dangerous
electrical discharge that could result in personal injury and / or damage to equipment and property. Take extra
care when using tools around a battery, remove personal metal items such as rings, bracelets, necklaces,
and watches when working with a lead-acid battery as a short circuit may result in severe burns or cause an
explosion.
Personal protection: The use of safety goggles, clothing protection and gloves when working with lead acid
batteries is strongly advised. Avoid contact with the electrolyte as this is acidic and is likely to cause burns to
the skin or clothes. If this occurs you should rinse the affected area with plenty of running cold water
immediately. Medical advice should be sought immediately in the event of burns to the eyes or if symptoms
persist as a result of burns to the skin.
GENERAL INFORMATION
Only use this product for the purposes described in this instruction booklet. Failure to do so will result in the
loss of your guarantee. The manufacturer will not accept liability for damage to the charger, persons or
property resulting from incorrect usage or failing to follow the instructions in this booklet.
DISPOSAL
In the event that this product must be disposed of, an authorised place for the recycling of electrical and
electronic appliances must be sought. Contact your local authority for information concerning local
Household Recycling Centres with applicable facilities.
This product must not be disposed of with general domestic waste.
SCOPE OF USE
This product is only to be used for charging 12V lead-acid, sealed lead-acid, maintenance-free and AGM
vehicle & leisure batteries of capacities 1.2Ah to 192Ah (Ampere hours). Consult the manufacturer of your
device, battery or vehicle if you are unsure about the suitability of this charger for use with it.
CHARGER DISPLAY FEATURES:
LED digital display
DISPLAY select button (see below)
POWER indicator LED
CHARGING indicator LED
CHARGED indicator LED
ERROR indicator LED
Vindicator LED
Aindicator LED
%indicator LED
The DISPLAY select button is used to toggle through the LED digital display options:
Battery Voltage (V) Displays the battery’s voltage in Volts: Vindicator LED is illuminated.
Charging Current (A) Displays the output charging current in Amps: Aindicator LED is illuminated.
Charged Percent (%) Displays a percentage estimate of the battery’s charge, 100% being fully
charged. %indicator LED is illuminated.
NOTE : The display will automatically revert back to “V” battery voltage after 5 seconds.
Protection Features:
Short circuits, open circuits, sparking, over-heating, current overloads & over-charging.

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BATTERY CHARGING INSTRUCTIONS
Please read your vehicle manufacturer’s instructions for further information and advice regarding charging
and the disconnection of the battery for charging purposes.
IMPORTANT: This charger will only recover 12V batteries with a minimum residual voltage of 1.5V. If the
residual voltage is lower than above figure, the charger will not operate. NOTE: This charger operates
automatically and will change operating status without warning.
1. PREPARATION OF THE BATTERY
Check the voltage and capacity of the battery to be charged. In the case of lead-acid batteries, firstly remove
the caps from each cell and check the level of liquid. If it is below the recommended level, top up with
deionized or distilled water. UNDER NO CIRCUMSTANCES SHOULD TAP WATER BE USED.
To avoid battery acid splashing, the cell caps should be replaced but not tightened until charging is complete.
This allows any gases formed during charging to escape. It is inevitable that some minor escape of acid will
occur during charging. If your battery is permanently sealed it is unnecessary to carry out these checks.
2. LOCATION & CONNECTION
Maintain as much distance as is practical between the battery and charger. Some slack in the input and
output leads must be maintained. Position the charger on a level, stable surface, completely free of
combustible materials. Never place the charger directly above the battery being charged; gases from battery
will corrode and damage the charger. Ensure the charger leads cannot be damaged by the vehicle
bodywork, sharp objects, or moving engine parts.
To avoid sparks which could cause an explosion, the mains supply should always be disconnected before
making or breaking battery connections. Connect the battery clips to the battery in the following order:
1) Connect the positive charging lead (RED) to the positive post of the battery (marked + / +ve or P).
2) For negative-earth vehicles with the battery still installed: Connect the negative charging lead (BLACK)
to the vehicle chassis, well away from the battery, fuel line, and hot or moving parts
3) For batteries removed from the vehicle:Connect the negative charging lead (BLACK) to the negative
post of the battery (marked - / -ve or N).
After connecting the clips, rotate them slightly to remove any dirt or oxidization, thus ensuring a good contact.
3. CHARGING
WARNING! DO NOT ATTEMPT TO START THE VEHICLE WITH THE CHARGER CONNECTED TO THE
BATTERY. THIS MAY DAMAGE YOUR BATTERY CHARGER.
1) Switch on the mains power supply. The “POWER” LED indicator will illuminate.
2) If the “ERROR” LED indicator illuminates please refer to the troubleshooting section. Charging will not
begin while the “ERROR” LED is illuminated. In this event, switch off the mains power supply and rectify
the problem before switching on the mains power supply again.
3) When the charging cycle begins, the “CHARGING” LED indicator will be illuminated. The charger will
now automatically measure the voltage of your battery and diagnose its condition. Providing the battery
is in an acceptable condition the 9 step charging cycle will now commence and the LED display will now
show charging information.

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The 9 step automatic charging program includes:
Battery condition diagnosis
Recovery with pulse charging
Battery preparation with soft start
Automatic current selection & bulk charging - charging with constant current
Constant voltage absorption charging
Resting and condition monitoring period
Maintenance float charging - When the battery is fully charged the charger will maintain the condition of
your battery automatically through voltage monitoring and pulse charging.
WARNING
It is recommended that charging should be supervised at all times. Monitor the temperature of the battery
during charging. If the temperature of the batteryexceeds 400C cease charging until the battery has cooled to
a safe temperature. Failure to do so may result in the battery exploding.
4. WHEN CHARGING IS COMPLETE
The “CHARGED” LED indicator will illuminate and the charger will continue to monitor & maintain the battery.
5. DISCONNECTING THE CHARGER
Switch off the mains supply, unplug the charger from the mains (To reduce risk of damage to themains cable,
pull by the plug rather than cable) & disconnect the clips from the battery, negative lead (BLACK) first. Then
disconnect the positive lead (RED) from the battery.
For non-sealed lead-acid batteries: Inspect the liquid levels in each cell and top up if necessary, using the
correct fluid. Now push home or tighten the caps. Any surplus fluid around the cell tops should be wiped off
(this should be done with extreme care as it is acidic). If the battery has been removed for charging, replace
it and re-connect the cables according to the manufacturer’s instructions.

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CAR BATTERY MAINTENANCE
It is essential to keep your battery regularly charged up throughout the year, especially during the winter
months. In the winter the effectiveness of your car battery is reduced by the cold. Oil is thick, engines are
difficult to start and the heater, windscreen wipers and lights are all draining power. It is at this time that
batteries have to be at peak power. If your battery is not regularly maintained and kept fully charged, it can
cause problems and a possible breakdown.
TECHNICAL SPECIFICATIONS
Protection class
Rated input
voltage
Rated input
current
Rated output
current
Max lead-acid
battery capacity
IP65
230V 50Hz
1.8A
12V : 8A
1.2-192Ah
TROUBLESHOOTING: Possible Charging Problems
PROBLEM
CAUSE
SOLUTION
Bad
Battery
The ERROR LED will illuminate under the
following bad battery conditions:
If the residual battery voltage is less
than 1.5V
If the battery voltage is still less than
11V after 4 minutes charging.
If the battery reaches full charge, but
the battery voltage then falls to less
than 12V within 2 minutes.
If the battery does not reach full charge
within 24 hours.
Have the battery tested by a qualified
technician.
Replace the bad battery if necessary.
Battery not
charging
Lack of 230V AC input power
If the battery terminals are corroded or
the clips are not making a good
connection
If battery connection leads are reversed
the ERROR LED indicator will illuminate:
Charging a very cold battery
Make sure that the charger is plugged into
mains supply AC outlet and the POWER LED
is illuminated. Check and replace the mains
plug fuse if necessary.
Switch off the charger and check the battery
clips; remove dirt or corrosion as necessary
and connect correctly.
Switch off the charger and connect the leads
correctly
In temperatures below freezing (0℃), a battery
will not accept a high rate of charge. The rate of
charge will increase as the battery warms.
Never attempt to charge a frozen battery.

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MAINTENANCE INSTRUCTIONS
This charger requires minimal maintenance. As with any appliance or tool, a few common sense rules will
prolong the life of this battery charger.
ALWAYS BE SURE THE CHARGER IS UNPLUGGED BEFORE PERFORMING ANY MAINTENANCE OR
CLEANING.
1. Store in a clean, dry place to avoid moisture damage
2. Loosely coil up the cords when not in use.
3. Clean the case and cords with a slightly damp cloth.
4. Clean any corrosion from the clamps with a solution of water and baking soda.
5. Examine the cords periodically for cracking or other damage and have them replaced if necessary.
6. WARNING:All other service should be done by qualified personnel only.
DECLARATION OF CONFORMITY
We declare that this product conforms to the following standards EN60335-1, EN60335-2-29, EN55014,
EN61000, and the following Directives 73/23 CEE, 93/68 CEE, 2004/108/EC, 2002/95/EC (ROHS)
Technical Manager
Maypole Ltd
September, 2016
EMAIL : [e-mail]
WEB : www.maypole.ltd.uk