Dell UPS 1920T - Manual (Page 53)

53 UPS Maintenance |
Storing the UPS and Batteries
If you store the UPS for a long period, recharge the battery every 6 months by plugging the UPS into a
power outlet. The batteries charge to 90% capacity in approximately 4 hours (8 hours for 500W
models). However, it is recommended that the batteries charge for 48 hours after long-term storage.
Check the battery recharge date on the shipping carton label. If the date has passed and the batteries
were never recharged, do not use the UPS. Contact your service representative.
When to Replace Batteries
When the status summary screen displays the UPS fault icon with the “Service Battery” alarm and the
audible alarm sounds continuously, the batteries may need replacing. Contact your service
representative to order new batteries.
NOTE: With the user-replaceable battery feature, UPS batteries can be replaced easily without turning the UPS
off or disconnecting the load.
Testing Batteries
For a battery test to run:
S
The batteries must be fully charged.
S
The UPS must be in Normal mode with no active alarms.
S
The load must be higher than 10%.
To test the batteries:
1 Plug the UPS into a power outlet for at least 48 hours to charge the batteries.
2 Press the button for one second to go to the main menu selection and scroll down to the
Control menu using the button.
3 Press the button to enter the Control menu.
4 Use the button to scroll to the Battery Test option.
5 Press the button to start the battery test.
During the battery test, the UPS transfers to Battery mode and discharges the batteries for 25% of
the original expected runtime. The front panel displays “Battery test running” and the percentage
of the test completed. The results display on the UPS front panel when complete.