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Maintenance 25
2.
Remove the two screws securing the option card and slide the card out.
To replace the component, reverse the removal procedure.
CAUTION: Only one communications port can be connected to the host computer. Connecting more than
one will result in unexpected UPS behavior. If an option card is installed, the serial and USB communications
ports are automatically disabled.
NOTE: Replacing the option card might require power management software to be restarted or
reconfigured.
Replacing the batteries
To replace the batteries:
1. Read and adhere to the requirements in Important battery safety information (on page 25) and
Battery care and storage guidelines (on page 26).
2. Follow the instructions in UPS battery replacement procedure (on page 26).
Important battery safety information
WARNING: The unit contains sealed lead-acid battery modules. To prevent fire or
chemical burns:
• Do not attempt to recharge batteries after removal from the unit.
• Do not disassemble, crush, or puncture the batteries.
• Do not short the external contacts of the batteries.
• Do not immerse the batteries in water.
• Do not expose to temperatures higher than 60°C (140°F).
WARNING: To prevent personal injury from hazardous energy:
• Remove watches, rings, or other metal objects.
• Use tools with insulated handles.
• Do not place tools or metal parts on top of batteries.
NOTE: To increase the useful life of the batteries, replace all battery modules at the same time.