Emerson GXT4 User's Guide download pdf (Page 16)

Product Description

Liebert

GXT4

™

1.5.3 Battery Mode

The Liebert 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 Liebert 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 7.0 - Troubleshooting.

For approximate battery run times, refer to Table 17.

NOTICE

Risk of loss of power to the connected load. Can cause equipment damage.

Turning Off the Liebert 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 5.2.1 -

Configuration Program).

1.5.4 Battery Recharge Mode

Once mains power is applied to the Liebert GXT4, the Battery Charger begins charging the batteries.

1.5.5 Frequency Converter Mode

All models of the Liebert GXT4 are capable of frequency conversion. Frequency Conversion Mode can

be selected using the configuration program. Allowable frequency operating modes include:

• Auto Sensing - 50Hz or 60Hz – Bypass Enabled

• Auto Sensing - 50Hz or 60Hz – Bypass Disabled

• Frequency Converter - 50Hz – Bypass Disabled

• Frequency Converter - 60Hz – Bypass Disabled

1.5.6 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.

Active ECO mode keeps the rectifier and inverter operating, allowing the inverter to remain

synchronized to bypass. This synchronization allows the transfer of the connected equipment to UPS

inverter power almost seamlessly if bypass power falls outside the user-set limits. Once bypass power

returns within the acceptable parameters, the UPS will return to Active ECO Mode operation.

The default setting is Active ECO Mode Off.

NOTE

The default for all models of the Liebert GXT4 is “Auto Sensing - 50Hz or 60Hz – Bypass

Enabled.”

CAUTION

Risk of electric shock. Can cause injury or death.

Never touch the AC input receptacle while the UPS is operating. Voltage may still be present

even when the AC input indicator is Off.

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Emerson GXT4 User's Guide Page 16

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