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Switch
1. Main Power Switch
This switch activates three separate UPS functions:
UPS Power
Press the switch, hold it for 3 seconds and release it to turn the UPS
ON or OFF.*
Alarm Silence
Press the switch and immediately release it to silence the UPS Alarm.
UPS Cold Start
Press the switch, hold it for 5 seconds and release it to turn your UPS
ON and to use it as a stand-alone power source (operating from the
battery without AC input).**
* The UPS will execute a 10-second self-test when you turn it on. The “Normal" LED will illuminate, and
the UPS will beep once to indicate the UPS is turned ON. If the UPS alarm sounds and the "Replace Battery" LED
illuminates, turn your UPS OFF, let your UPS charge its batteries for 12 hours and turn UPS back ON to repeat the
automatic self-test. If alarm still sounds, contact Tripp Lite for service. CAUTION: Do not unplug your UPS to test its
batteries. This will remove safe electrical grounding and may introduce a damaging surge into your network
connections.
** The "Backup" LED will illuminate since your UPS will operate from battery power.
Basic Operation
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9904216 Smart 450 RT Owners Manual [120 Volt].p65 3/13/00, 3:02 PM5