Liebert GXTMT Series Installation and User Manual
1-3 kVA UPS
Page １４ V2.11 Emerson Network Power
6. Operating modes for all models
1.
Utility power mode
The display panel in utility power mode is shown in the following diagram. The utility power LED
and the INV LED are turned on. The load level LEDs will be turned on in accordance with the
load capacity connected.
1) If the battery LED is turned on and the utility power LED flashes, it indicates the voltage
or frequency of the utility power has exceeded the normal range, the UPS operates in battery
mode.
2) If output overloaded, the load level LEDs will be turned on and alarm will sound twice every
second. You should get rid of some unnecessary loads one by one to decrease the loads
connected to the UPS less than 90% of its nominal power capacity.
Note: Please follow the following steps to connect the generator：
z Activate the generator and wait until the operation is stable before supplying generator
power to the UPS.
z The generator capacity should be sized to match the performance characteristics of the
UPS
.
2. Battery mode
The display panel in battery mode is shown in the following diagram Fig.15.2. The battery LED
and the INV LED are turned on. The displayed number of the battery level LEDs will be turned
on in accordance with the battery capacity. Note that the load level LEDs in utility power mode
will indicate the level of the battery capacity in battery mode instead.
1) When the UPS is running in battery mode, the buzzer beeps once every 4 seconds. If
the “ON” button on the front panel is pressed
2) For more than 1 second again, the buzzer will stop beeping (in silence mode). Press the
“ON” button once again for more than 1 second to resume the alarm function.
Fig 15.1 The utility power mode
Operating modes
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