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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. 
 

1.  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: 

  Connect the positive charging lead (RED) to the positive post of the battery (marked 

+, +ve

 or 

P

). 

  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 

  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. 

 

2. 

CHARGING 

WARNING!  DO NOT ATTEMPT TO START THE VEHICLE WITH THE CHARGER CONNECTED TO THE 
BATTERY. THIS MAY DAMAGE YOUR BATTERY CHARGER.

 

Note: If the “ERROR” LED indicator illuminates please refer to the charging function table. 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. 

 

a.  Connect to or switch on the mains power supply. 

The “POWER” LED indicator will illuminate. 

b.  Select the appropriate charger voltage for your battery. 
c.  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 automatic charging cycle will now commence.  

 
The 9 step automatic charging program includes: 

 Battery condition diagnosis 

 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. 

 
 

Summary of Contents for MP7403

Page 1: ...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 sen...

Page 2: ...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 6V or 12V lead acid sealed lead acid maintenance free and AGM ve...

Page 3: ...ill installed Connect the negative charging lead BLACK to the vehicle chassis well away from the battery fuel line and hot or moving parts 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 2 CHARGING WARNING ...

Page 4: ...supply unplug the charger from the mains To reduce risk of damage to the mains 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 s...

Page 5: ...charging Or falls below 6V within 2mins after fully charged Then battery will be determined as bad battery and ERROR LED will be illuminated Have the battery tested by a qualified technician Replace the bad battery if necessary Charging a 12V battery If the voltage does not reach 11V 0 2 after 4 mins charging Or falls below 12V within 2mins after fully charged Then battery will be determined as ba...

Page 6: ...equires 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 cl...

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