System information

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Battery Replacement:
1. Use the indicator lights to confirm that battery replacement
is required
2. Open the battery compartment cover
3. Remove the old battery from the battery compartment
4. Remove the positive (red) and negative (black) leads from
the old battery
5. Attach the negative (black) and positive (red) leads to the
new battery
6. Insert the new battery into the battery compartment
7. Close the battery compartment cover
(3) Connect “+” Terminal
(3) Disconnect “-” Terminal
Battery Installation Instructions:
Battery Removal Instructions:
(1) Connect “-” Terminal
(1) Disconnect “+” Terminal
(2) Push Tabs
Outwards &
Install Battery
(2) Push Tabs
Outwards &
Remove
Battery
Maintenance
2. APC ES 750
In order to maintain maximum emergency telephone service capability, avoid plugging any other
devices into the top row of 5 battery backup outlets. You can use the bottom row of 5 surge-
protected outlets as a power strip for any devices you may wish to connect.
Indicator Signals:
Status
Visual Indications
(Power On- Green
Replace Battery- Red)
Audible
Indication
Alarm Terminates
When
Power On - UPS is supplying
conditioned utility power to the load.
Power On LED - ON None Not applicable
On Battery - UPS is supplying
battery power to load connected to
Battery outlets
Power On LED - ON (off
during beep)
Beeping 4
times every 30
seconds
UPS transfers back to
Power On operation,
or when UPS is
turned off.
Low Battery Warning - UPS is
supplying battery power to the load
connected to the Battery outlets and
the battery is near exhausted
Power On LED - flashing
(every 1/2 second)
Rapid beeping
(every 1/2
second)
UPS transfers back
to normal operation,
or when UPS is
turned off.
Replace Battery - The battery is
disconnected.
The battery is in need of charging or
is at the end of its usual life and must
be replaced
Power On and
Replace Battery LEDs -
flashing(alternating)
Replace Battery LED -
flashing
Constant tone
Constant tone
UPS is turned
off with the
power switch
Overload Shutdown - During On
Battery operation a battery power
supplied outlet overload was detected
None Constant tone
UPS turned off with
the power switch
Overload Alarm - Online power
exceeded Back-UPS capacity.
Power On LED - ON Constant tone
Equipment power
plugs are moved
from Battery Backup
outlets to Surge or
Client outlets.
Sleep Mode - During On Battery
operation the battery power has
been completely exhausted, and
the UPS is waiting for utility power
to return to normal.
None
Beeping
once every 4
seconds
Utility power is
restored, or if utility
power is not restored
within 32 seconds, or
the UPS is turned off.
Building Wiring Fault - Your
building wiring presents a shock
hazard that should be corrected by a
licensed electrician.
Building Wiring Fault LED
(red) - ON
None
UPS is unplugged,
or is plugged into
a property wired
outlet.