Basic Operation (continued)

Indicator Lights

Basic Operation (continued)

Other UPS Features

All Indicator Light descriptions apply when the UPS is plugged into a wall outlet and turned ON.

“POWER” LED: this green LED lights continuously when the UPS is ON and supplying connected equipment with AC power from a utility source. The LED flashes and an alarm sounds (4 short beeps followed by a pause) to indicate the UPS is operating from its internal batteries during a blackout or severe brownout. If the blackout or severe brownout is prolonged, you should save files and shut down your equipment since internal battery power will eventually be depleted. See “BATTERY CHARGE” LED description below.

“VOLTAGE CORRECTION” LED: this green LED lights continuously whenever the UPS is automatically correcting high or low AC voltage on the utility line without the assistance of battery power. The UPS will also emit a slight clicking noise. These are normal, automatic operations of the UPS, no action is required on your part.

“OUTPUT LOAD LEVEL” LEDs: These multicolored LEDs indicate the approximate electrical load of equipment connected to the UPS's AC outlets: green (light load), yellow (medium load) and red (overload). If the red LED is either illuminated continuously or flashing, clear the overload immediately by unplugging some of your equipment from the outlets until the yellow or green LED illuminates. CAUTION! Any overload that is not corrected by the user immediately may cause the UPS to shut down and cease supplying output power in the event of a blackout or severe brownout.

“BATTERY CHARGE” LEDs: When the UPS is operating from utility power, these LEDs indicates the approximate charge state of the UPS's internal batteries: red indicates the batteries are beginning to charge; yellow indicates the batteries are roughly midway through charging; and green indicates the batteries are fully charged. When the UPS is operating from battery power during a blackout or severe brownout, these multicolor LEDs indicate the approximate amount of energy (ultimately affecting runtime) that the UPS's batteries will provide: red indicates a low level of

USB Port

RS-232 (DB9 port)

AC Receptacles: These output receptacles provide your connected equipment with AC line power during normal operation and battery power during power outages. The UPS protects equipment connected to these receptacles against damaging surges and line noise. Select outlets provide both battery backup and surge protection for computers, monitors and other critical devices into these outlets. Select outlets provide surge protection only for printers and other non-essential devices that draw large amounts of power.

Communication Ports (USB and RS-232): These ports connect your UPS to any workstation or server. Use with Tripp Lite's PowerAlert Software and included cables to enable your computer to automatically save open files and shut down equipment during a blackout. Also use PowerAlert Software to monitor a wide variety of AC line power and UPS operating conditions. Consult your PowerAlert Software manual or contact Tripp Lite Customer Support for more information. See “USB Communications” and “RS-232 Serial Communications” in the “Optional Installation” section for installation instructions.

Telephone/Network Protection Jacks: These jacks protect your equipment against surges over a telephone/network data line. Connecting your equipment to these jacks is optional. Your UPS will work properly without this connection.

Not compatible with PoE (Power Over Ethernet) applications.

Accessory Slot: Remove the small cover panel from this slot to install optional accessories to remotely monitor and control your UPS. Refer to your accessory’s manual for installation instructions. Contact Tripp Lite Customer Support at (773) 869-1234 for more information, including a list of available SNMP, networking management and connectivity products.

Fan: The fan cools the UPS's internal components. It operates only when the UPS is in battery backup mode, is charging its batteries or is carrying a heavy electrical load.

energy; yellow indicates a medium level of energy; and green indicates a high level of energy. Since the runtime performance of all UPS batteries

Battery Replacement

will gradually deplete over time, it is recommended that you periodically perform a self-test (see “MUTE/TEST” Button description) to determine the energy level of your UPS batteries BEFORE a blackout or severe brownout occurs. During a prolonged blackout or severe brownout, you should save files and shut down your equipment since battery power will eventually be depleted. When the red LED illuminates and an alarm sounds continuously, this indicates that the UPS's batteries are nearly out of power and UPS shutdown is imminent.

“BATTERY WARNING” LED: this LED lights yellow and an alarm sounds intermittently after you initiate a self test (See “MUTE/TEST” Button description) to indicate the UPS batteries need to be recharged or replaced. Allow the UPS to recharge continuously for 12 hours, and repeat the self-test. If the LED continues to light, contact Tripp Lite for service. If your UPS requires battery replacement, visit www.tripplite.com.

"SITE WIRING FAULT" LED: This yellow LED will be lit if the UPS detects a problem with the wiring of the AC outlet you connect it to. If this

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Battery Replacement Door: Under normal conditions, the original battery in your UPS will last several years. Battery replacement should be performed only by qualified service personnel. Refer to “Battery Warnings” in the Safety section. Should your UPS require battery replacement, visit Tripp Lite on the Web at www.tripplite.com/support/ battery/index.cfm to locate the specific replacement battery for your UPS.

1Carefully pull the front panel away from the UPS.

Place front panel on top of the unit. Remove the battery support bar.

2Remove old batteries.

Carefully pull the batteries from the UPS and disconnect them.

3Connect new batteries.

Connect the new batteries in exactly the same manner as the old ones: positive (red) connectors together and negative (black) connectors together. Carefully push batteries back into the UPS.

occurs, have the outlet inspected by a qualified electrician. Note that while the UPS will detect many common wiring faults, including a missing ground, reversed polarity and overloaded neutral circuits, it cannot detect every conceivable wiring problem.

34 Reassemble UPS.

Reinstall the battery support bar and replace the front panel.

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Tripp Lite SMART750SLT owner manual Indicator Lights, Other UPS Features, Carefully pull the front panel away from the UPS