C H A P T E R 6
UPS MAINTENANCE
This section explains how to:
Care for the UPS and batteries
Replace the batteries
Recycle used batteries
UPS and Battery Care
For the best preventive maintenance, keep the area around the UPS clean and dustfree. If the atmosphere is very dusty, clean the outside of the system with a vacuum cleaner.
For full battery life, keep the UPS at an ambient temperature of 25°C (77°F).
Storing the UPS and Batteries
If you store the UPS for a long period, recharge the battery every
10 months by connecting the UPS to a power source. The batteries charge to 90% capacity in approximately 4 hours. However, it is recommended that the batteries charge for 6 to 24 hours after
Replacing Batteries
With the hotswappable battery feature, UPS batteries can be replaced easily without turning the UPS off or disconnecting the load.
If you prefer to remove input power to change the battery, press and hold the 
button until the long beep ceases (approximately five seconds). Then unplug or remove utility power from the UPS.
Consider all warnings, cautions, and notes before replacing batteries.
Powerware® 9120 User's Guide 05147426 A Uncontrolled Copy | 29 |