Tripp Lite 450 RTI AC Normal/AVR LED, Backup/Low Batt LED, Fault/Overload LED, Replace Batt LED

Indicator Lights

The SmartPro 450 RTI uses dual function Indicator Lights. These lights can indicate more than one UPS or power condition, depending on whether they illuminate constantly or flash. All Indicator Light descriptions refer to when the UPS is connected to the wall outlet and turned ON.

2."AC Normal/AVR" LED

This green light will illuminate constantly when the utility-supplied AC line voltage at your wall outlet is normal. It will flash when your UPS is automatically correcting high or low AC line voltage using AVR (Automatic Voltage Regulation). This is a normal, automatic operation of your UPS, and no action is required on your part.

3. "Backup/Low Batt" LED

This yellow light will illuminate constantly to indicate your UPS is providing your equipment with battery power. Also when your UPS is providing power from battery, the UPS's Alarm will sound once every 15 seconds until silenced. This light will flash when the UPS's battery is nearly drained and the UPS is initiating an automatic system shutdown. During automatic system shutdown, the UPS's Alarm will sound once every second and cannot be silenced, though it will turn off when shutdown is complete.

4. "Fault/Overload" LED

This red light will illuminate constantly to indicate a short circuit or other fault in the UPS. Also, the UPS's Alarm will sound constantly for 30 seconds, then the UPS will automatically shut down. The light will flash and the UPS's Alarm will sound once each second when the UPS's capacity has been exceeded while it is operating from battery power. In this case, immediately remove equipment from the battery-supported outlets until the UPS can support the remaining load.

5. "Replace Batt" LED

This red light will illuminate constantly if a battery self-test indicates that the UPS battery is less than fully charged or is defective. If this occurs, turn the UPS OFF, let it charge for 12 hours, then turn it back ON and perform a second battery self-test. If this light comes on again, contact Tripp Lite for service.