III. OPERATION & PROGRAMMING
Once the Duo Charge wiring is installed, . When the Duo Charge is powered up, the LEDs will increment from right to
left four times -- followed by #1 and #2 (Amber) lights and a (Green) light indicating the base program as described
below. Note: Display reads from right to left:
PRO #1 Standard Flooded (UFP) - Indicated by #1 Amber, #2 Amber, #3 Green (Voltage limits: 13V to 14V)
PRO #2 Deep Cycle Flooded (FLA) - Indicated by #1 Amber, #2 Amber, #4 Green (Voltage limits: 13V to 14.4V)
PRO #3 Gel - Indicated by #1 Amber, #2 Amber, #5 Green (Voltage limits: 13V to 13.9V)
PRO #4 Absorbed Glass Mat - Indicated by #1 Amber, #2 Amber, #6 Green (Voltage limits: 13V to 14.2V)
The #3 (Green) LED will illuminate as soon as charging voltage at input terminal reaches 13 volts (or 26 volts in a 24V
system). This indicates that the Duo Charge is supplying charging current to the starting battery. The #3 (Green) LED
will remain illuminated during normal automatic operation. The #4 (Green) light will illuminate if the Duo Charge is
switched to Manual Mode.
IV. PROGRAMMING FOR SYSTEM VOLTAGE
The Duo Charge is compatible for 12VDC and 24VDC systems. At start-up the Duo Charge
display will scroll from amber to green to indicate 12-volt, or green to amber to indicate 24-
volt operation. The Duo Charge is shipped from the factory in 12-volt mode. To change the
Duo Charge for 24-volt operation:
1. Disconnect the power wire from the ON/OFF terminal.
2. Hold the magnetic tip of the screwdriver atop the reed switch. Re-attach the ON/OFF wire, while maintaining con-
tact with the reed switch. A single green (#3) LED should illuminate.
3. Continue to hold the magnet to the switch until the #4 green LED illuminates as well. Release. After several sec-
onds, the green LEDs will go dark and the #1 and #2 ambers LEDs will flutter. Later, the display will scroll from
green to amber, indicating 24-volt operation.
4. To return the Duo Charge to 12-volt operation, activate the reed switch prior to startup, release the switch after
the #3 and #4 (Green) LEDs are illuminated. When the LEDs are extinguished, re-activate the reed switch and
hold. The #3 and #5 (Green) LEDs will illuminate, indicating re-entry into12V mode.
V. PROGRAMMING FOR BATTERY TYPE
The Duo Charge comes from the factory pre-programmed for the Standard Flooded (UFP) setting. To adjust the Duo
Charge for your battery type:
1. With the Duo Charge powered up, activate the magnetic reed switch (see illustration) and hold. #1 and #2
(Amber) lights will be illuminated, followed by individual scrolling green lights indicating the battery program
choices.
#3 Green Light indicates Standard Flooded (UFP)
#4 Green Light indicates Deep Cycle Flooded (FDC)
#5 Green Light indicates Gel Cell (GEL)
#6 Green Light indicates Glass Mat (AGM)
2. When the desired Green LED is indicated, release the magnetic switch by
removing the magnetic programming tool. If you go beyond your desired pro-
gram, release the switch, wait for the Green LED to go out, re-activate and hold
the switch with the programming tool, and the LEDs will scroll in the opposite
direction. Remove the magnetic tool when the desired Green LED is indicated.
3. When the desired program is selected, the lights will go out and then the #1 and
#2 (Amber) LEDs will come on, then go out. Then the #1 (amber) will come on,
then extinguish. The #2 (amber) will come on, then go out. This will happen 3
times. Both #1 and #2 (Amber) LEDs will flash 8 times. This signifies the Duo
Charge is saving the selection.
NOTE: When programming the Duo Charge, the reed switch must be
activated while the two amber lights are illuminated after start up, or the
voltage at the house battery must be greater than 13 volts. Once the Duo
Charge enters sleep mode (and all lights are extinguished) programming
will not be possible without re-starting the Duo Charge.
