Liebert GXTMT Series Installation and User Manual
1-3 kVA UPS
Page １５ V2.11 Emerson Network Power
2) When the battery capacity decreases, the number of the battery capacity LEDs turned on will
be reduced. If the battery voltage descends to the alarm level, the buzzer will beep once
every second to remind the users of insufficient battery capacity and the UPS is soon going
to shut down automatically. Then the load operations should be carried out promptly and the
loads should be eliminated one by one.
3. Bypass mode
The display panel in bypass mode is shown in the following diagram Fig 15.3. The utility power
LED and the bypass LED are lit. The displayed number of the load LEDs will be turned on in
accordance with the load capacity connected. The UPS will beep once every 2 minutes in
bypass mode.
The utility power LED flashes, it shows that the voltage or frequency of the utility power has
exceeded the normal range of the UPS.
1) Other indications on the display panel are the same in utility mode.
2) The UPS does not have the backup function when it is in bypass mode. The power used
by the load is supplied from the utility power via internal filter.
4. Abnormality mode
In case the fault LED is turned on when the UPS is in use, it shows that the UPS is operating in
abnormal mode.
Fig 15.2 Battery mode diagram
Fig 15.3 UPS bypass mode diagram
Battery Maintenance
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