Maintenance 28
If the installation has been successful, the UPS enters Operate mode. If the installation has not been
successful, the alarm beeps, the On Battery LED illuminates and the General Alarm LED flashes. If this
occurs, repeat the procedures in "Replacing the batteries (on page 25)," and check the battery terminal
connections. If the condition persists, see "Troubleshooting (on page 29)."
IMPORTANT: Charge the batteries for at least 24 hours before supplying backup power to devices. The
batteries charge to:
• 90% of their capacity within 4 hours
• 100% of their capacity within 24 hours
Replacing the UPS
To remove the UPS:
1. Power down all attached load devices.
2. Power down the UPS ("Powering down the UPS" on page 22).
3. Unplug the UPS power cord.
4. Disconnect the communications cable.
5. Unplug the load devices.
6. Remove the UPS front bezel ("Removing the UPS front bezel" on page 24).
7. Remove the UPS battery bracket.
8. Remove the UPS battery modules.
9. Remove the screws securing the UPS to the rack.
10. Remove the UPS from the rack.
To replace the component, reverse the removal procedure.
Updating the UPS firmware
CAUTION: Using a USB to serial converter cable will damage the UPS.
To update the UPS firmware, see the HP website (http://www.hp.com/go/rackandpower
).
Cleaning battery spills
1. Put on acid-resistant boots, a chemical face shield, chemical splash goggles, and acid-resistant
gloves.
WARNING: Battery acid can severely damage your eyes and skin.
2. Remove combustible materials and all sources of ignition.
3. Stop the flow of material and contain or absorb small spills with dry sand, earth, or vermiculite.
4. Neutralize spilled battery acid with the special solutions contained in a spill kit or with a solution of
1 lb baking soda to 1 gallon of water.
5. Be sure the mixture is neutral, then collect the residue and place the residue in a drum or other
suitable container.
6. Properly dispose of hazardous waste.
WARNING: Do not allow discharge of unneutralized acid to reach the sewer.
