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User’s manual 

- 5 - 

FUM – 2410/15/20CBP 

 

G.  Power supply / 2 stage charger mode (see Fig.3) 

At this mode the Charger On (5) LED becomes red color and only bulk and float LED will function. The bulk LED will be off 
when battery is charged to about 80% full. 

The  3  stage  charger  becomes  a  2  stage  charger  or  as  power  supply  in  this  selected  mode  because  3  stage  charger  overcharges 
battery with external load. 

This  selected  mode  is  intended  for  use  to  charge  battery  with  external  load  such  as  caravan  or  other  battery  and  external  load 
combination. 

A 2-stage charger can be used as a combination charger/power supply. An external load can draw current from the charger while 
the  charger  is  recharging  a  battery.  The  charger  doesn't  care  how  much  current  is  being  diverted  by  an  external  circuit  as  it 
switches from bulk mode (constant current) to float mode based only on the battery terminal voltage.  

However, a 2-stage charger cannot completely charge the battery when the charger switches from bulk mode to float mode. After 
switching  to  float  mode,  the  battery  will,  in  most  cases,  be  about  80%  recharged.  The  battery  receives  the  remaining  recharge 
while in float mode over several days. 

It is highly recommended to switch back to the 3 stage charger mode periodically when the external load is disconnected. 

Also the external load should not be more than 50% of the max. current of the charger, unless the battery is fully charged up. If the 
bulk LED is on most of the time then the load is too large. 

G1. As a stand alone power supply 

It can also be used as a stand alone power supply without connection to a battery. It will provide a constant voltage according to 
the selected float voltage (26.4/27.0/27.6V) and rated DC current of the charger. 

However, it is not recommended for high surge load (such as lamp) in stand alone application as the initial high surge current will 
trigger the overload protection of the power supply. 

 

Power supply / 2 stage charger mode application 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for FUM-2410CBP

Page 1: ...f the charger there is no user serviceable parts inside Do not charge the battery on boats Remove the battery and charge on shore Never attempt to charge a frozen battery Never attempt to charge a damaged battery Wear protective goggles and turn your face away when connecting or disconnecting the battery Never place the charger on top of a battery Never smoke use an open flame or create sparks nea...

Page 2: ... See section G 2 Battery type selection Slide switch to set charger for AGM gel wet and calcium calcium type battery 3 Float voltage selection Slide switch to set float charge voltage to 26 4 27 0V 27 6V 4 Charge status LED display Charger ON LED Green 3 stage charger mode Red Power supply mode BULK LED Red Bulk charging with constant max current ABSORPTION LED Orange Absorption charging with pres...

Page 3: ... Ah C Battery charger installation and connection Observe the warnings safety precautions before rushing to install and operate the charger Check battery condition fill up cells for wet battery clean battery poles Secure the battery charger in a well ventilated place make sure the mounting surface is flat and without soft covering material or loose paper sheet The air intake is at the bottom and a...

Page 4: ...dependently by user according to the type of battery such that battery can be connected permanently to the charger when it is not in use E Manual equalization charging for wet type battery only Wet lead acid battery requires periodic high voltage charging about 10 overcharge absorption voltage to balance the voltage of each cell reverse the high concentration of electrolyte at the bottom and clear...

Page 5: ... voltage However a 2 stage charger cannot completely charge the battery when the charger switches from bulk mode to float mode After switching to float mode the battery will in most cases be about 80 recharged The battery receives the remaining recharge while in float mode over several days It is highly recommended to switch back to the 3 stage charger mode periodically when the external load is d...

Page 6: ...perature control function never plug in the charger during charging I Cable size selection Wire size AWG Area mm Maximum one way distancie for 2 voltage loss 24V 15A Maximum one way distancie for 2 voltage loss 24V 20A Maximum one way distancie for 2 voltage loss 24V 25A 10 5 26 4 65 m 15 3 feet 3 50 m 11 5 feet 2 80 m 9 2 feet 8 8 37 7 31 m 24 feet 5 48 m 18 feet 4 39 m 14 4 feet 6 13 3 11 58 m 3...

Page 7: ...on even after 20 hours charging time Absorption light remains on all the time Wrong battery type selection eg charge gel battery with Calcium Calcium or wet type selection Check charged battery label and change battery type selection to correct setting Total battery capacity is too high for dual charging Check battery capacity or charge battery separately Battery temperature too high Use temperatu...

Page 8: ...ll load 100 230VAC 5 6 2 4A 7 4 3 2A 9 3 3 9A Protection Overload 90 110 rated output current or 50 rated output current soft charge Protection type constant current limiting recovers automatically after fault condition is removed Short circuit Recovers automatically after fault condition is removed Reverse polarity Car blade fuse Over temperature Protecction type shut down OVP output over voltage...

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