Question about Liebert Computers & Internet
If you accidently hit the the Bypass button, you can't turn off bypass mode unless you shut the UPS down. Is there a way around this?
Posted by Anonymous on
Staticbypass is actvated by the main control card via the press button swith,to transfter back to online mode its still the control card that do the timing for the transition to take place so i would suggest you test with another control card or try and be patient and see if it takes longer time to transfer back to online mode.
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Posted on Jan 02, 2017
Hello gypsy6767, I spent 10 years as a Liebert Rep here in the Phoenix, Az. market! Here is a link to the Liebert GXT User's Manual - http://www.liebert.com/common/ViewDocument.aspx?id=1199
I hope this helps,
Posted on Mar 13, 2009
SOURCE: bypass LED on the ups is on
This an excerpt from the UPS's manual:
The Bypass LED illuminates indicating that the UPS is in bypass mode. Utility power is sent directly to connected equipment during bypass mode operation. Bypass mode operation is the result of an internal UPS fault, an overload condition, or a user initiated command through an accessory. Battery operation is not available when the UPS is in bypass mode.
Posted on Jul 19, 2009
To figure out what's wrong with the UPS, first you have to do a few things.
When calculating the rating a UPS can handle, it's voltage x amperage. If it's Watts multiply the number by 1.67 to give the rating of the device.
Add up all the devices (use the power supply rating in the computer) as well as any other device, and add them up.
If this rating was exceeded, then you have overloaded the UPS. If it was too long that you did this, then you wore out the battery.
When a UPS beeps even when not connected, that means the battery is very weak.
If the battery is more than 3 years old, it will need to be changed. If the online tests of the unit were done and the battery doesn't need replacing, then other parts of the UPS need fixing.
Check the battery.
Posted on Jul 27, 2009
it is possible the bypass alarm is flashing because the i/p and o/p are not within range to switch without a break.
they need to be nearly equal in volts and freq so when the ups switches the ups o/p is continuous.
you should be able to check this with your ups software.
Posted on Sep 16, 2009
You definitely want to follow the manual procedure to avoid a possible load loss:
9.1.4 Transfer from Normal to Bypass Mode
To transfer the critical load to Bypass mode:
C A U T I O N
In Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.
1. Press the CONTROLS pushbutton on the main menu bar. The System Controls
2. Press the BYPASS pushbutton on the System Controls menu bar.
The UPS transfers to Bypass mode and the critical load is immediately supplied
by the bypass source. If the bypass source is not available, the power processor
remains on and an alarm sounds.
3. The UPS is now operating in Bypass mode and the BYPASS status indicator is
The power module (PM) status indicates READY. The system is now on bypass
and the UPS power processor remains on.
At this point, you can operate an external bypass switch to get to maintenance bypass if needed.
Posted on Nov 06, 2009
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Pins 5 & 6 - Any-Mode Shutdown
1. Pin 6 of the 9-pin communication connector is used for "Any-Mode Shutdown"
of the UPS output. This control input may be used in special applications
to disable the UPS output power-both Inverter and Bypass.
2. The Options tab allows the behavior of the Any-Mode Shutdown feature to
be modified. When the program opens, or the REFRESH button is pressed,
the UPS setting is read by the configuration program and displayed.
Pin 6 Logic
If version 1.6 (or later) is used with an earlier Liebert GXT2U model (with an
earlier UPS firmware version), the Any-Mode Shutdown features cannot be
If the configuration program is used with an earlier UPS model (with an
earlier UPS firmware version) that does not support the modification of these
settings, the Options tab will display a reminder of the factory default
settings. These cannot be changed.
Note that when this option is selected and the UPS output is
disabled using Pin 6, the UPS output can turn on automatically
and without warning if the Pin 6 connection is changed.
DO NOT CHANGE THIS OPTION from the factory default
setting unless you are ready to install a normally-closed
connection between Pins 5 & 6. This connection must be
maintained to use the UPS or to use the configuration program
again, including the ability to change the UPS setting back to the
default setting using the configuration
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