Vertiv Liebert GXT4-2000RT120 - Battery Mode; Battery Recharge Mode; Frequency Converter Mode; Active ECO Mode

2.6.3 Battery Mode
The GXT4 enters Battery Mode when mains power fails or is outside acceptable limits. The battery system
supplies power through the DC-to-DC converter to the inverter to generate clean AC power for the
connected loads.
When the GXT4 enters Battery Mode, the UPS sounds a half-second beep at 10-second intervals. When
approximately 2 minutes of run time remains, the beeps sound every 5seconds to warn that the battery is
getting low (this Low Battery Warning is user-configurable).
In Battery Mode, the battery indicator will illuminate and the LCD will show the prompt utility power not
available.
Press either the Up or Down button once, then press the Enter button to clear the prompt and silence the
audible alarm. Once the alarm prompt has been acknowledged, the screen showing the estimated battery
run time and battery capacity will be visible. Refer to Troubleshooting on page49.
For approximate battery run times, refer to Table 9.5 on page60.
NOTICE
Risk of loss of power to the connected load. Can cause equipment damage.
Turning Off the GXT4 when it is in Battery Mode will result in loss of output power to the
connected load.
If the UPS is turned Off manually, it must be manually restarted after mains power returns.
If the UPS is turned Off by a communication signal or because the batteries are depleted, it will
operate as set in the configuration program for Auto-Restart (Refer to Configuration Program
on page39).
2.6.4 Battery Recharge Mode
Once mains power is applied to the GXT4, the Battery Charger begins charging the batteries.
2.6.5 Frequency Converter Mode
All models of the GXT4 are capable of frequency conversion. Frequency Conversion Mode can be selected
using the configuration program. Allowable frequency operating modes include:
• Auto Sensing - 50 Hz or 60Hz – Bypass Enabled
• Auto Sensing - 50 Hz or 60Hz – Bypass Disabled
• Frequency Converter - 50 Hz – Bypass Disabled
• Frequency Converter - 60Hz – Bypass Disabled
NOTE: The default for all models of the Liebert® GXT4 is “Auto Sensing - 50 Hz or 60Hz – Bypass
Enabled.”
2.6.6 Active ECO Mode
All Liebert® GXT4 models can operate in Active ECO Mode. In this mode, the connected equipment is
powered through the bypass path to increase efficiency, reducing the electrical costs.
2 GXT4 Description
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