13
Charger Function s
The smart charging system in Pump Sentry is microprocessor controlled to yield optimum charging rates
and long battery life.
When the electrical source is restored allowing the resumption of the charging process, there is a 2
second delay during which the charge state of the battery is assessed. After this delay, the bottom of the
two LED indicators comprising the battery monitor will illuminate. These LEDs inform the user
regarding the state of the battery:
LED State of Battery
Bottom LED “Flashing” - The battery is in the process of recharging.
Bottom LED “On” - The battery is fully charged.
Replace Battery LED - When batteries age to the point where they can maintain their fully
charged state only for short periods of time, it is an indication that their capacity
has decreased. They no longer have the ability to sustain their loads as they did
when they were new. The Pump Sentry detects this degradation causing the
Replace Battery LED to illuminate. When the battery reaches below 50% of its
new battery state, this condition is detected by the monitor. Other LED’s may be
lit at the same time.
Figure #1 on page 14 shows the Battery Monitor LED array.
Uninterruptible Power Indicator
The “Power Output” indicator shown in Figure #1 informs the user that AC power is present at the
output receptacle providing power to the load. This LED is applicable to both the standby (AC line
power present) and Back Up (Battery Power) states.
This LED will be extinguished in the following situations:
a) The main fuse is blown (in the Standby or Back Up states). See Section on Fuses (Page 15)
b) The battery is exhausted (in the Standby state)
Figure #1 on page 14 shows the location of this Uninterruptible Power Indicator.
Fan Operation
The air-intake fan, located adjacent to the red DC cable terminal, is thermostat controlled. It operates
only when the internal surface of the Pump Sentry exceeds 100F. This eliminates unnecessary fan
operation thereby minimizing battery loading.
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