System information

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Battery Replacement:
Replace the battery when the Replace Battery Indicator light is flashing.
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
8. Use the indicator lights to confirm proper battery operation
Battery Cover
Release Tab
Battery Terminals
Battery Wires
Maintenance
3. and 4. APC PowerShield CP24U12 & CP27U13
Then only difference in the CP24U12 &CP27U13 is the alarm silence indicator. CP24U12 does
not have this feature.
Indicator Signals:
Explanation Description
On Battery
Four beeps in four seconds will be emitted one time only. This alarm will
sound when the utility power is lost and the unit goes on battery power.
Low Battery
Voltage
Every five minutes, four beeps in four seconds will be emitted. This alarm
will sound when operating on battery and the battery voltage has dropped
below threshold, indicating that less than 20% of available runtime remains.
Replace
Battery
Every fifteen minutes, there will be a quarter-second beep when the battery
fails the automatic self-test.
Audible Alarm
Indicator Description
Utility Solid green indicates the unit is on utility power.
Solid yellow indicates that utility power is not present and the unit is on
battery power.
Flashing green LED indicates the unit is fast-charging.
Output
Green indicates the unit is working properly and DC output power is
provided by the battery or the utility power.
Replace Battery/
Alarm Silence
Red indicated that the battery must be replaced or that the battery is
disconnected. See Battery Replacement.
Pressing this button will silence the audible alarm. See Alarm Silence
Button.
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Status Indicators
MAINTENANCE