5
WORKING WITH A DEAD BATTERY OR A BATTERY WITH A VERY
LOW VOLTAGE:
If you try to charge a dead battery having a voltage below 3 volts, the
Battery Tender
®
charger will not start. An internal safety circuit prevents the
charger from generating any output voltage unless it senses at least 3 volts
at the charger output. In this situation, the amber LED will continue to flash,
indicating that a charge has not been initiated.
NOTE:
If a 12-volt, lead-acid battery has an output voltage of less than 9 volts
when it is at rest, when it is neither being charged nor supplying electrical
current to an external load, there is a good chance that the battery is
defective. As a frame of reference, a fully charged 12-volt, lead-acid
battery will have a rest-state, no-load voltage of approximately 12.9 volts.
A fully discharged 12-volt, lead-acid battery will have a rest-state, no-load
voltage of approximately 11.4 volts. That means that a voltage change of
only 1.5 volts represents the full range of charge 0% to 100% on a 12-Volt,
lead-acid battery. Depending on the manufacturer, and the age of the
battery, the specific voltages will vary by a few tenths of a volt, but the 1.5-
volt range will still be a good indicator of the battery charge %.
STATUS INDICATING LIGHT: If the light is not lit, then the battery is
not properly connected and/or the charger is not plugged into AC
power. The following describes light operation:
AMBER LIGHT FLASHING (Amber LED 1) – The amber LED
flashing indicates that the battery charger has AC power available
and that the microprocessor is functioning properly. If the amber
LED continues to flash, then either the battery voltage is too low
(less than 3 volts) or the output alligator clips or ring terminals are
not connected correctly.
AMBER LIGHT ON STEADY (Amber LED 1) – Whenever the
amber LED is on steady, a battery is connected properly and the
charger is charging the battery. The amber LED will remain on until
the charger completes the charging stage.
GREEN LIGHT FLASHING (Green LED 3) – When the green LED
is flashing and the amber LED (Amber LED 1) is solid the battery is
greater than 80% charged and may be removed from the charger
and used if necessary. Whenever possible, leave the battery on
charge until the green light is solid.
GREEN LIGHT ON STEADY (Green LED 3) – When the green
LED burns steady, the charge is complete and the battery can be
returned to service if necessary. It can also stay connected to
maintain the battery for an indefinite period of time
6
TROUBLESHOOTING
1) If the charger does not turn on and none of the LEDs illuminate.
a. Check to make sure the AC outlet is supplying power by plugging
in a lamp, an appliance, or a voltage meter.
2) The green LED (3) comes on immediately when charging a discharged
battery.
a. The battery is probably defective, take the battery to the dealer to
be tested.
3) When charging a battery the green LED never comes on.
a. The battery may be defective, take the battery to the dealer to be
tested.
b. The battery has an excessive current draw, remove or disconnect
the battery from the equipment.
4) The amber LED continues to flash even with a connection to the
battery:
a. Check the fuse in the accessory cable.
5) 12V green LED is flashing.
a. The battery is damaged or the incorrect battery voltage has been
selected.
6) 6V green LED is flashing.
a. The battery is damaged or the incorrect battery voltage has been
selected.
7) Amber and Green LED are toggling.
a. Reverse polarity connection to the battery.
b. The chargers safety timer has activated due to the battery not
reaching its optimal voltage. The battery may be defective, take
the battery to the dealer to be tested.
FCC Warning
Title 47 Subpart, 15.105(b)
Note: This equipment has been tested and found to comply with the limits for a
class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio television reception, which can be
determined by tuning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
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