7 CONTROLS AND INDICATORS
Figure 7.1 Liebert GXT3 control panel
7.1 ON/Alarm Silence/Manual Battery Test Button
This button controls output power to connected load(s) and has three functions:
• ON
• Alarm Silence
• Manual Battery Test
ON - Pressing this button for four seconds will start the UPS.
Alarm Silence - To silence alarms, press this button for at least one second. After the alarm is silenced, the Liebert
GXT3 will reactivate the alarm system to alert of additional problems.
NOTE: The LOW BATTERY and BYPASS reminder alarms CANNOT be silenced.
Manual Battery Test - To initiate a manual battery test, press the ON button for at least one second while operating from
utility power with no alarm conditions present.
• If only three of the five Battery LEDs illuminate, allow the UPS to recharge the batteries for 24 hours.
• After 24 hours, retest the batteries.
• After the batteries have been retested, if only three of the five Battery LEDs illuminate, contact your local
dealer, Emerson representative or Emerson Channel Support.
7.2 Standby/Manual Bypass Button
This button controls output power to connected load(s) and has dual functions: Standby and Manual Bypass.
NOTICE
Pressing the Standby/Manual Bypass button once will transfer the load to bypass power and
the load will be unprotected from disturbances in utility supply. Pressing the Standby/Manual
Bypass button twice within 4 seconds while on Bypass will cut off power to the output sockets
and connected loads. Perform all necessary shutdown procedures on connected loads before
pressing this button twice.
7.3 Load Level Indicators (4 Green, 1 Amber)
The load level indicator is composed of five sets of LED bars that illuminate to indicate the relative load on the UPS output
in 25% increments (±5%). The load level indicator will illuminate as shown in Figure 7.2 on the next page.
The load level indicators display the approximate electrical load placed upon the UPS at all times.
Vertiv | Liebert® GXT3 ™ Installer/User Guide | 37
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