Tripp Lite SU1500RTXL2UA Owner's Manual for SmartOnline Rack/Tower UPS 932471 - Page 9

Basic Operation "BYPASS" LED: This yellow light will flash to indicate that the UPS's DC/AC inverter is deactivated and the UPS is in the "Bypass" mode. During normal operation this LED will light briefly when the unit is plugged in, but if an internal fault or overload occurs this light will flash constantly and the fault LED will illuminate to show that connected equipment will receive filtered AC mains power, but will not receive battery power during a blackout. In this case, contact Tripp Lite for service. If the UPS has been placed into Economy Mode (available on select UPS systems), it configures an online UPS to function as a switching UPS. When the UPS system is in Economy Mode, it operates at increased efficiency while AC utility power is available (within +/- 10% nominal) and switches to battery power if AC utility power is interrupted. The yellow "BYPASS" LED will remain on when the UPS system is in Economy Mode. (For more information on how to access the Economy Mode, please refer to the PowerAlert software User's Manual) "FAULT" LED (select models only): This red light will flash when your UPS detects an internal fault (overheating, overvoltages, etc.) or when it detects a wiring fault in your wall outlet (reversed phases, missing ground, etc.) The UPS will only detect wiring faults when it is plugged into a utility outlet but not turned ON. If the light persists after restarting the UPS, contact an electrician to check the AC line. Your UPS will identify the presence of most (but not all) wiring faults. "LOAD ACTIVE METER" LED: This green light will illuminate when your UPS is receiving AC power to indicate that the set of four dual-function LEDs is displaying the load level of your UPS. "BATT ACTIVE METER" LED: This green light will illuminate when your UPS is operating from battery power to indicate that the set of four dualfunction LEDs is displaying the battery charge level of your UPS. Note: the "ON BATT" LED will also be illuminated. "OVERLOAD" LED: This red light will illuminate constantly to indicate that your UPS's capacity has been exceeded while it is in on-line operation. The UPS alarm will beep continuously. Immediately remove overload until light and alarm goes off. If you do not immediately remove the overload, the UPS will transfer from on-line to bypass operation. "BATT LOW" LED: This yellow light will illuminate when your UPS's battery charge level is low. The UPS alarm will beep until either the battery charge is depleted or the batteries are adequately recharged. "ON BATT" LED: This green light will illuminate constantly to indicate that AC line voltage is not present and your UPS is providing your equipment with battery power. The UPS will also beep every two seconds, unless silenced by the "ON/TEST" Button. When this light is illuminated, you can monitor the battery charge level of your UPS on the "BATT ACTIVE METER" LEDs. 9 201102199 93-2471.indb 9 3/30/2011 9:14:03 AM