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FRONT PANEL CONTROLS & INDICATORS
1. UPS Power Switch
The UPS ON/OFF switch controls both UPS input
power as well as output power to the loads. The ”I”
position signifies ON, and the ”0” position signifies
OFF. CAUTION: Resetting power switch causes
loss of power to output receptacles. Shutdown
critical loads before resetting power switch.
2. Load Bar Indicator
This 5-segment LED indicates relative electrical
load placed on the UPS. The left most 4 segments
are green, and the fifth segment is red. Each green
segment lights at 25% load increments (no LEDs
light until load on the UPS reaches 11%). Loads
beyond 100% causes the red fifth segment to light.
3. Capacity Bar Indicator
This 5-segment LED indicates the approximate battery capacity during battery mode or a
battery test. All segments light at full battery capacity and extinguish one by one in 20%
increments until complete battery depletion. Normally, all segments should light after 4
hours recharge. See battery run time curves.
During normal operation, battery capacity below 60% causes the CAPACITY bar to flash its
three left-most LED segments. To determine actual battery capacity, depress the ”Battery
Test” switch. Typically, the CAPACITY bar flashes following a power outage, when
batteries have not fully recharged. If after 4 hours of recharge (or in the test mode) the 3
left most LEDs still flash, contact Liebert Technical Support at 1-800-222-5877 and ask
about replacement batteries.
4. Battery Indicator (amber)
The UPS lights this indicator and sounds and alarm when in battery mode or during a
battery test.
5. Fault Indicator (red)
The UPS lights this indicator when it detects a fault. The UPS flashes this indicator and
sounds an alarm during over-temperature conditions.
6. AC Indicator (green)
When lit, this LED indicates input utility power is available and the UPS power switch is ON.
UPS flashes this LED and sounds an alarm with high input voltage.
7. Battery Test and Alarm Reset Switch
Normal Operation: Depress this switch to test battery capacity. The UPS operates in
battery mode as long as the switch is depressed. Observe how many segments in the
CAPACITY bar light to determine battery capacity. If the left three LEDs flash, replacement
batteries may be necessary. Contact Liebert Technical Support at 1-800-222-5877.
NOTE: As long as the Battery Test switch is depressed the batteries discharge and shorten
back-up time. Do not depress the switch longer than necessary, especially if the UPS
supports a heavy load.
Battery Mode: Press this switch for a half-second to silence on-battery alarms. Once
silenced, the UPS still sounds the low-battery alarm at the appropriate time. This switch
cannot reset over-temperature, fault, high AC input, or bypass alarms.