Led Display; Battery Charger Controls - Schumacher SS-120A-PE Owner's Manual

D.
LED Indicators: The battery charger has three LED lights. They
indicate different functions.
RED LED – A steady glow indicates POWER ON and proper
connection to the battery. A flashing red LED usually indicates
that the battery is NOT connected correctly and the connections
need to be checked. The red LED will also flash if the charger's
circuit breaker opens (see CIRCUIT BREAKER). If Automatic
charging takes more than 24 hours, the red LED will flash rap-
idly (see note below). The red LED will flash several times when
the switch position is changed. (For an explanation of a rapidly
flashing red LED, see "Desulfation Mode" in battery Charger
Controls section.)
YELLOW LED - A steady glow indicates when the charger is
CHARGING in the Automatic modes. It will flash if the charger
goes into Desulfation mode. In Manual mode to indicate charg-
ing, the yellow LED will flash rapidly.
GREEN LED – When in Automatic mode, after the battery is
fully charged, the charger will change to the Charged/Maintain
state and the green LED will flicker. This indicates that the Float-
mode Monitoring is keeping your battery maintained at full charge.
The green LED will also flicker (along with the rapidly flashing
yellow LED) when the charger is in Manual mode. If the green
E.
MANUAL-AUTOMATIC SWITCH
Charging may be either Manual or Automatic.
OPERATION
The charger contains a three-position switch that determines its
mode of operation. There are two AUTOMATIC positions and
one MANUAL position.
MANUAL CHARGING
When the MANUAL position is selected the charger will con-
tinue to charge and will NOT shut off when the battery is fully
charged. The GREEN LED will glow after the charging current
has stabilized at some small value but the charger will continue
to charge.
WARNING: In the MANUAL position, the charger will continue to
charge even after the battery is fully charged.

LED DISPLAY

BATTERY CHARGER CONTROLS

3
LED is flickering without the yellow LED and the charger is in
Manual mode, then charging has lasted longer than 24 hours
(see note below).
NOTE: When charging in Manual mode, the battery needs to be
monitored frequently. The charger will NOT sense the battery at
full charge and shut off automatically. You must disconnect the
charger when the battery is at Full Charge or battery damage
will occur.
As a safety precaution, the charger automatically switches into
Float-Mode monitoring after 24 hours of charging in Manual mode.
However, if using the Manual mode, damage to the battery might
have already occurred after 24 hours. DO NOT rely on this func-
tion to tell you if your battery is fully charged in Manual mode.
Also as a safety precaution, the charger automatically aborts
charging if it has not reached the Charged/Maintain state after
24 hours of charging in Automatic mode (the red LED will flash
rapidly).
To restart the charging process after the charger switches to Float-
mode Monitoring, reset the charger by moving the switch to an-
other position then repositioning it to the mode you want to use.
WARNING: Overcharging can damage the battery.
AUTOMATIC CHARGING
When an AUTOMATIC position is selected, the charger goes
through a three-step charging process. During the BULK charge
phase, the charger attempts to deliver 12 amps of current to the
battery until the battery voltage levels off. At this point, the charger
enters the ABSORPTION charge phase. In this phase, the
charger will hold the battery voltage constant and let the battery
determine the charging current. When the charging current sta-
bilizes, the charger will continue to charge for a couple hours to
bring the battery up to full charge. The charger will then auto-
matically enter the MAINTAIN MODE - Float-Mode Monitoring.
During this phase, the charger will hold the battery voltage con-
stant at 13.2 volts to guard against self-discharge of the battery.
The charge current will typically be a few tenths of an amp.