Operation
Starting the UPS on Battery
NOTE Before using this feature, the UPS must have been powered by utility power at least once and the batteries must be completely charged.
To turn on the UPS without using utility power, press and hold
the 
button until you hear the UPS beep (approximately one second). The UPS supplies power to your equipment and goes into Battery mode. The LCD briefly displays On Delay, then On Battery and the and + - indicators illuminate. When the UPS starts on battery, it does not conduct a selftest to conserve battery power.
Turning the UPS Off
To turn off the UPS, press and hold the 
button until the long beep ceases (approximately five seconds).
NOTE When you press and hold the 
button, the LCD displays Shutdown Pending.
The indicator turns off and the LCD briefly displays UPS OFF before going blank. The fan continues to run and the UPS remains in Standby mode until you unplug or remove utility power from the UPS.
Standby Mode
When the UPS is turned off and connected to a power source, the UPS is in Standby mode. The fan continues to run and the battery recharges when necessary. The indicator is off and the LCD panel is blank, indicating that power is not available from the UPS.
Diagnostic Tests
The UPS automatically performs a
A battery test is automatically performed every 30 days (720 hours) of continuous Normal mode operation. The test lasts approximately
15 seconds and any failure is displayed on the front panel.
Both the UPS and battery tests can be performed manually (see •Configuration Mode" on page 17 for more information).
Powerware® 9120 User's Guide 05147426 A Uncontrolled Copy | 15 |