UPS Operation
When shutdown is imminent, the Self Test indicator flashes. These warnings are approximate, and the actual time to shutdown may vary significantly. Once these warnings are indicated, immediately complete and save your work to prevent data loss and similar difficulties. When utility power is restored after the UPS shuts down, the UPS automatically connects to the load when the startup is complete.
Diagnostics
The UPS periodically performs diagnostic tests while the unit is operating in Normal mode, ensuring proper operation. These tests include:
SSelf Test
SUtility Verification Test
SBattery Discharge Test
SOver Temperature Test
The UPS also runs a series of over 20 internal tests when power is first applied. If a diagnostic test fails, see Chapter 7, “Troubleshooting” on page 75.
Battery Test on Demand
You can perform a battery test on the UPS while it is operating in Normal mode by pressing the Output On button. The UPS automatically distributes some of the load to the batteries for 30 seconds and tests the battery’s performance.
Battery Start
NOTE Before using this feature, the UPS must have been powered by utility power at least once.
This feature allows you to start the UPS without utility power. After utility power has been unavailable for one minute, press and hold the Output On button until the alarm beeps.
The UPS supplies power to your equipment and goes into Battery mode.
The 
indicator remains lit and the front panel displays the percentage of battery capacity remaining to the UPS. This process should take about 20 seconds.
52 | Powerware® 9 Prestige Series User’s Guide (4500/6000 VA) S Rev H www.powerware.com |