5.4 Performing Manual Bypass
To manually transfer the connected equipment to the internal bypass:
1. From the main menu select Control then press enter.
2. Select T UR N O N & O FF and press Enter.
3. Select T UR N UPS BYPA SS and press Enter. The UPS will transfer the connected loads to the
internal bypass.
If the internal bypass is not available because of input power problems, pressing this button once will be
ignored. Bypass operation is indicated by an audible alarm and illuminated amber Bypass indicator. (If
other indicators are illuminated, refer to Troubleshooting on page 53.)
5.5 Shutting Down the GXT4
To shut down the UPS from the LCD:
1. From the Main Menu select CO N T R O L, press Enter, then select T UR N O N & O FF.
2. Press the Enter key.
3. Select T UR N UPS O FF, then press Enter. Press either the Up or Down button to move the
cursor to confirm the turn off command and press Enter.
T h e UPS will sou n d a n au d ib le a la rm . Th is is n orm al.
4. Power to the connected equipment is now Off.
The UPS display will still be illuminated because the batteries are still being charged. The UPS may now
be disconnected from AC power, and the UPS will completely shut down in approximately 15 seconds.
5.6 Disconnecting Input Power from the GXT4
1. After the UPS has been shut down as detailed in Shutting Down the GXT4 on page 42,
disconnect the input cable from the wall socket.
2. Wait 30 seconds and verify that all indicators have turned Off and the fan has stopped.
This indicates that the power-off is complete.
3. Turn the external battery cabinet breaker switch to the Off position if the UPS has an external
battery cabinet.
After powering Off the UPS, the UPS ceases output and the load is powered Off.
5.7 Placing UPS in Maintenance Bypass
Maintenance Bypass Mode is used when maintenance or replacement is required. To place the unit in
Maintenance Bypass:
1. Place the UPS on internal bypass. This may be done by either of the following methods:
a. Refer to Performing Manual Bypass on page 42.
b. Slide the bracket away from the manual bypass breaker on the rear of the UPS. This
requires loosening the captive screw and sliding the bracket up and away from the
Manual Bypass breaker.
2. Move the Manual Bypass breaker on the rear of the UPS to the bypass position. This requires
loosening the captive screw and sliding the bracket up and away from the Manual Bypass
breaker.
Vertiv | Liebert GXT4 Installer/User Guide | 42
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