Maintenance 35
UPS battery replacement procedure
This component is hot-swappable and can be replaced without powering down the UPS.
1. (optional) To replace the component with the UPS powered down, refer to "Powering down the UPS
(on page 29)."
CAUTION: When hot-swapping batteries, the UPS is not protected in the event of a utility power failure,
unless at least one ERM is installed.
2. Remove the UPS front bezel ("Removing the UPS front bezel" on page 31).
3. Remove the UPS battery bracket ("Removing the UPS battery bracket" on page 16).
4. Remove the UPS battery modules.
To replace the component, reverse the removal procedure.
IMPORTANT: Charge the batteries for at least 24 hours before supplying backup power to devices. The
batteries charge to:
• 80 percent of their capacity within 3 hours
• 100 percent of their capacity within 48 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 29).
3. Switch the circuit breaker for any attached ERMs to the Off (down) position.
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