Liebert UPStation GXT 2U User manual

POWER AVAILABILITY
UPStation GXT 2U™
USER MANUAL
500-3000VA
120V

i
TABLE OF CONTENTS
1.0 GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.0 MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Transient Voltage Surge Suppression (TVSS)
and EMI/RFI Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Rectifier/Power Factor Correction (PFC) Circuit . . . . . . 5
3.3 Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4 Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.5 DC to DC Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.6 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.7 Dynamic Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.8 GXT 2U (Rear View). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 Tower UPS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Rack-Mount UPS Conversion and Installation . . . . . . . 9
4.4 External Battery Cabinet Installation . . . . . . . . . . . . . 13
5.0 CONTROLS AND INDICATORS . . . . . . . . . . . . . . . . . . . 14
5.1 ON/Alarm Silence/Manual Battery Test Button . . . . . 14
5.2 Standby/Manual Bypass Button . . . . . . . . . . . . . . . . . . 15
5.3 Load/Battery Level Indicators (4 Green, 1 Amber) . . . 15
5.4 Fault Indicator LED (Red). . . . . . . . . . . . . . . . . . . . . . . 15
5.5 Bypass Indicator LED (Amber) . . . . . . . . . . . . . . . . . . . 15
5.6 UPS ON Indicator LED (Green) . . . . . . . . . . . . . . . . . . 15
5.7 Battery Indicator LED (Amber). . . . . . . . . . . . . . . . . . . 15
5.8 AC Input Indicator LED (Green). . . . . . . . . . . . . . . . . . 16
5.9 Output Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . 16

ii
6.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . 17
6.1 Normal Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2 Bypass Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 Battery Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4 Battery Recharge Mode . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.0 COMMUNICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1 Communications Interface Port. . . . . . . . . . . . . . . . . . . 19
7.2 Pins 4 & 5 - Remote Shutdown on Battery . . . . . . . . . . 20
7.3 Pins 5 & 6 - Any-Mode Shutdown . . . . . . . . . . . . . . . . . 21
7.3.1 Auto-Enable Output . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.3.2 Pin 6 Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.4 UPS Intelligent Communications . . . . . . . . . . . . . . . . . 22
8.0 CONFIGURATION PROGRAM . . . . . . . . . . . . . . . . . . . . 23
8.1 GXT 2U Configuration Program Abilities. . . . . . . . . . . 23
8.1.1 What You Will Need . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.1 Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.1.1 Internal Battery Replacement Procedures . . . . . . . . 25
9.2 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . 27
11.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12.0 BATTERY CABINET SPECIFICATIONS . . . . . . . . . . . . . . 34
13.0 BATTERY RUN TIMES . . . . . . . . . . . . . . . . . . . . . . . . . 35
14.0 PRODUCT WARRANTY REGISTRATION. . . . . . . . . . . . . 36
TABLES
Table 1 Troubleshooting guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 2 Alarm conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

1
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important safety instructions. Read all safety,
installation, and operating instructions before operating the Uninter-
ruptible Power System (UPS). Adhere to all warnings on the unit and
in this manual. Follow all operating and user instructions. Individuals
without previous training can install and operate this equipment.
It is not intended for use with life support and other designated “criti-
cal” devices. Maximum load must not exceed that shown on the UPS
rating label. The UPS is designed for data processing equipment. If
uncertain, consult your local dealer or Liebert representative.
This UPS is designed for use on a properly grounded (earthed), 50Hz
or 60Hz, 120V supply (programmable for 100, 110, 115, 120 and
127VAC output). Installation instructions and warning notices are
located in this manual.
ELECTROMAGNETIC COMPATIBILITY—The GXT 2U™ Series
complies with the limits for a CLASS A DIGITAL DEVICE, PURSU-
ANT TO Part 15 of FCC rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including
interference that may cause undesired operation. Operating this
device in a residential area is likely to cause harmful interference that
users must correct at their own expense.
Operate the UPS in an indoor environment only in an ambient tem-
perature range of 32°F to +104°F (0°C to +40°C). Install it in a clean
environment, free from moisture, flammable liquids, gases and corro-
sive substances.
!WARNING
Opening or removing the cover may expose you to lethal
voltages within this unit even when it is apparently not
operating and the input wiring is disconnected from the
electrical source. Observe all cautions and warnings in this
manual. Failure to do so MAY result in serious injury or
death. Refer all UPS and battery service to qualified service
personnel. Do not attempt to service this product yourself.
Never work alone.

2
This UPS contains no user serviceable parts except the internal bat-
tery pack. The UPS ON/Standby push buttons do not electrically iso-
late internal parts. Under no circumstances attempt to gain access
internally other than to replace the batteries due to risk of electric
shock or burn. Do not continue to use the UPS if the front panel indi-
cations are not in accordance with these operating instructions or if
the UPS performance alters in use. Refer all faults to your local
dealer, Liebert representative or the Liebert Worldwide Support
Group.
Servicing of batteries should be performed or supervised by personnel
knowledgeable of batteries and the required precautions. Keep unau-
thorized personnel away from the batteries. PROPER DISPOSAL OF
BATTERIES IS REQUIRED. REFER TO YOUR LOCAL LAWS AND
REGULATIONS FOR BATTERY DISPOSAL REQUIREMENTS.
Never block or insert any object into the ventilation holes or other
openings of the UPS.
DO NOT CONNECT equipment that could overload the UPS or
demand half-wave rectification from the UPS, for example: electric
drills, vacuum cleaners, laser printers or hairdryers.
Storing magnetic media on top of the UPS may result in data loss or
corruption.
Turn the UPS off and isolate the UPS before cleaning; use only a soft
cloth, never liquid or aerosol cleaners. Keep the front and rear vents
free of dust accumulation that could restrict airflow.
When replacing batteries, replace with the same Liebert authorized
replacement battery kits.
!CAUTION
Do not dispose of battery or batteries in a fire. The battery
may explode.
Do not open or mutilate the battery or batteries. Released
electrolyte is harmful to skin and eyes. It may be toxic.
!CAUTION
A battery can present a risk of electrical shock and high short
circuit current. The following precautions should be observed
when working on batteries:
• Remove watches, rings, and other metal objects.
• Use tools with insulated handles.

Glossary of Symbols
3
1.0 GLOSSARY OF SYMBOLS
Risk of electrical shock
Indicates caution followed by important instructions
AC input
AC output
Requests the user to consult the manual
Indicates the unit contains a valve-regulated lead acid
battery
Recycle
DC voltage
Equipment grounding conductor
Bonded to ground
AC voltage
ON
Standby
i

Introduction
4
2.0 INTRODUCTION
Congratulations on your choice of the Liebert UPStation GXT 2U™
Uninterruptible Power System (UPS). It provides conditioned power
to microcomputers and other sensitive electronic equipment.
Upon generation, AC power is clean and stable. However, during
transmission and distribution it may be subject to voltage sags,
spikes, or complete power failure that may interrupt computer opera-
tions, cause data loss, or even damage equipment. The UPStation
GXT 2U protects equipment from these disturbances.
The UPStation GXT 2U comes in nominal power ratings of 500, 700,
1000, 1500, 2000 and 3000 VA. Complete model specifications appear
at the end of this manual.
The UPStation GXT 2U is a compact, “on-line” UPS. An on-line UPS
continuously conditions and regulates its output voltage, whether util-
ity power is present or not. It supplies connected equipment with
clean sinewave power. Sensitive electronic equipment operates best
from sinewave power.
For ease of use, the UPStation GXT 2U features a light-emitting diode
(LED) display to indicate either load percentage or battery capacity
depending upon the mode of operation. It also provides self-diagnostic
tests, a combination ON/Alarm Silence/Manual Battery Test button, a
Standby button, user configurable program, and two levels of alarms
when the unit is operating on battery.
The UPStation GXT 2U has an interface port for communication
between the UPS and a network server or other computer systems.
This port provides detailed operating information including voltages,
currents, and alarm status to the host system when used in conjunc-
tion with Liebert MultiLink™ software. MultiLink software can also
remotely control UPS operation.

Major Components
5
3.0 MAJOR COMPONENTS
3.1 TRANSIENT VOLTAGE SURGE SUPPRESSION (TVSS)
AND EMI/RFI FILTERS
These UPS components provide surge protection and filter both elec-
tromagnetic interference (EMI) and radio frequency interference
(RFI). They minimize any surges or interference present in the utility
line and keep the sensitive equipment protected.
3.2 RECTIFIER/POWER FACTOR CORRECTION (PFC) CIRCUIT
In normal operation, the rectifier/power factor correction (PFC) circuit
converts utility AC power to regulated DC power for use by the
inverter while ensuring that the waveshape of the input current used
by the UPS is near ideal. Extracting this sinewave input current
achieves two objectives:
• The utility power is used as efficiently as possible by the UPS.
• The amount of distortion reflected on the utility is reduced.
This results in cleaner power being available to other devices in the
building not being protected by the UPStation GXT 2U.
3.3 INVERTER
In normal operation, the inverter utilizes the DC output of the power
factor correction circuit and inverts it into precise, regulated sinewave
AC power. Upon a utility power failure, the inverter receives its
required energy from the battery through the DC to DC converter. In
both modes of operation, the UPS inverter is on-line and continuously
generating clean, precise, regulated AC output power.
Input Output
Inverter
Battery
Battery
Charger
DC to DC
Converter
Rectifier
/PFC
TVSS &
EMI/RFI
Filters
L1
L2
G
L1
L2
G
Dynamic
Bypass

Major Components
6
3.4 BATTERY CHARGER
The battery charger utilizes energy from the utility power and pre-
cisely regulates it to continuously “float charge” the batteries. The bat-
teries are being charged whenever the UPStation GXT 2U is plugged
in, even when the UPS is not turned on.
3.5 DC TO DC CONVERTER
The DC to DC converter utilizes energy from the battery system and
raises the DC voltage to the optimum operating voltage for the
inverter. This allows the inverter to operate continuously at its opti-
mum efficiency and voltage, thus increasing reliability.
3.6 BATTERY
The UPStation GXT 2U utilizes valve-regulated, nonspillable, flame
retardant, lead acid batteries. To maintain battery design life, operate
the UPS in an ambient temperature of 68°F to 77°F (20°C to 25°C).
Optional external battery cabinets are available to extend battery run
times.
3.7 DYNAMIC BYPASS
The UPStation GXT 2U provides an alternate path for utility power to
the connected load in the unlikely event of a UPS malfunction. Should
the UPS have an overload, overtemperature, or UPS failure condition,
the UPS automatically transfers the connected load to bypass. Bypass
operation is indicated by an audible alarm and illuminated amber
Bypass LED (other LEDs may be illuminated to indicate the diag-
nosed problem). To manually transfer the connected load from the
inverter to bypass, press the Standby button once.
NOTE
The bypass power path does NOT protect the connected
equipment from disturbances on the utility supply.

Major Components
7
3.8 GXT 2U (REAR VIEW)
Input Fuse/Circuit
Breaker
AC Input
Support Base
Output
Receptacles
External Battery
Connector
Cooling Fan
Intellislot®Port
DB-9
Communications Port

Installation
8
4.0 INSTALLATION
4.1 PREPARATION
1. Visually inspect the UPS for freight damage. Report damage to
the carrier and your local dealer or Liebert representative.
2. Decide where to place the GXT 2U. Install the UPS indoors in a
controlled environment, where it cannot be accidentally turned off.
Place it in an area of unrestricted airflow around the unit, away
from water, flammable liquids, gases, corrosives, and conductive
contaminants. Maintain a minimum clearance of 4 in. (100mm) in
the front and rear of the UPS. Maintain an ambient temperature
range of 32°F to 104°F (0°C to 40°C).
3. The GXT 2U may be installed in either a tower configuration or in
a rack, depending on available space and use considerations.
Determine the type of installation and follow the appropriate
instructions in either 4.2 - Tower UPS Installation or 4.3 -
Rack-Mount UPS Conversion and Installation.
4.2 TOWER UPS INSTALLATION
When using the GXT 2U in a tower configuration, use the included
support base (shown below, left) to stabilize the UPS.
If any battery cabinets are added, they will include spacers to accom-
modate the additional cabinets (shown below, right).
!CAUTION
The UPS is heavy (see 11.0 - Specifications). Take proper
precautions when lifting or moving it.
NOTE
UPS operation in temperatures above 77°F (25°C) reduces
battery life.
Support base Spacers added to support
base to accommodate
additional battery cabinets

Installation
9
4.3 RACK-MOUNT UPS CONVERSION AND INSTALLATION
1. For slide rail installations, first remove the top/side fin. Slide the
top/side fin forward, then lift it up to remove. If desired, install the
optional rack mount handles that were shipped with the UPS.
Securing hardware and slide rails are sold separately. Contact
your local dealer or Liebert representative for these additional
options and any assistance needed.
2. Unpack the two (2) rack-
mounting bracket assemblies
and mounting hardware
from the rack-mounting kit
(P/N: RMKIT18-32). Bracket
assemblies are
interchangeable between
left-hand or right-hand.
Remove inner member of
each bracket assembly as
shown at right by extending
it to its outermost position,
depressing the retaining
latch and then pulling inner
member from bracket
assembly.
NOTE
When rack mounted, the UPS must be supported by a shelf,
brackets or slide rails on each side. The rack mount handles
WILL NOT support the weight of the UPS. They are used to
move the UPS into and out of the rack.
+
–
AC INPUT BATTERY UPS ON BYPASS
UPStation GXT
Optional rack mount handles
Return
flanges
Inner
members
Retaining
latches
Front
members
Rear
members

Installation
10
3. Determine the height position inside the rack enclosure where you
want to mount the UPS or battery cabinet.
Install rear member of each
bracket assembly into rack
enclosure with two (2) M5
screws provided in this kit.
(See figure at right.) Return
flanges on bracket assembly
fit to the inside of rack
mounting rails. Insert screws
loosely (finger-tight) into top
and bottom holes of return
flange on rear member.
Extend bracket assembly by
sliding front member for-
ward until it touches the front rack mounting rail. Insert two (2) M5
screws loosely (finger-tight) into top and bottom holes of return
flange on each front member. Make sure bracket assemblies are at
the same mounting height on all four (4) rack mounting rails.
4. Locate eight (8) M4 screws
and eight (8) M4 nuts from
hardware pack in this kit.
Each nut has a locking, nylon
insert that begins gripping
the screw when it is halfway
tight. Make sure to tighten
nut and screw completely to
assure locking action. Fasten
rear member and front
member together using four
(4) screws and four (4) nuts
per bracket assembly as
shown in the figures at right.
For maximum support,
locate fasteners for each
bracket assembly as far
apart as possible, depending
on rack depth, while still
joining both members (See
figures at right). Check alignment of bracket assemblies and
TIGHTEN ALL SCREWS FROM STEPS 3 and 4.
!CAUTION
Reduce risk of tipping the rack enclosure by placing UPS or
battery cabinet in the lowest possible rack position.
M5 screws
M5 screws
Front rack
mounting rails
Rear rack
mounting
rails
32" rack
depth
M4 nuts
M4 nuts
M4
screws
18" rack
depth
M4 nuts
M4 nuts
M4
screws

Installation
11
5. Prepare the UPS or battery
cabinet (the “equipment”) for
rack mounting by following
instructions in the equipment’s
user manual. The equipment
may require additional parts to
be added or parts to be removed
for rack mounting. After it is
prepared, lay equipment in
rack-mounting position. Fasten
inner members from Step 2 to
the equipment on both sides as
shown in the figure at right
with (8) M4 screws provided in
this kit. Make sure retaining
latch is near the rear of the equipment (also shown in figure).
6. Open grease packet provided
in this kit. Apply a 1" long
bead of grease four (4) places
inside the bottom, curved
tracks of front members as
shown at right. The grease
will allow the equipment to
slide into the bracket
assemblies more easily.
7. Insert the equipment, with inner members attached from Step 5,
into bracket assemblies by inserting top and bottom edges of inner
members into the top and bottom, curved tracks of front members
and sliding the equipment into rack (see figure in Step 6). Ends of
inner members are tapered to allow rear of the equipment to be
angled upward before insertion, if space allows.
Then the rear, bottom edges of inner
members can be placed into front
edge of bottom tracks, and the front of
the equipment can be tipped up into
horizontal position to insert the top
edges of inner members before sliding
the equipment into rack (see figure at
right). The equipment should move smoothly into bracket assem-
blies. If not, recheck alignment of front and rear members from
Steps 3 and 4.
!CAUTION
Lifting equipment into rack may be a two-person job, depending
on weight of equipment. See equipment’s user manual.
UPS or battery
cabinet
Front
M4
screws
M4
screws
Retaining
latch
UPS or
battery
cabinet
Apply
grease
(inside)
Apply grease

Installation
12
8. Secure front of the equipment to rack mounting rails to prevent
the equipment from sliding out of position. If securing holes are
provided on front of the equipment that align with the center holes
on return flange of front members, you can use the four (4) extra
M5 screws provided in this kit to secure the equipment.
Otherwise, the equipment should be secured to front of rack
mounting rails with four (4) customer-supplied fasteners.
9. To orient the display for
horizontal viewing, remove the
front plastic bezel by pulling
forward evenly on both sides.
The unit has two front panel
overlays. Remove the outer
overlay (used for tower
installation). This reveals a
horizontally oriented front
panel overlay for rack
mounting. Snap the front bezel
back into place.
10. Once the UPS is installed in
the rack, the load may be
connected. Ensure the load
equipment is turned off; plug
all loads into the output
receptacles on the rear of the
UPS.
11. Plug the UPS into a dedicated
wall receptacle properly
protected by a circuit breaker
or fuse in accordance with national and local electrical codes. Use
a 15 amp rated device for the 500, 700, 1000, or 1500 VA units,
20 amp for the 2000 VA, and 30 amp for the 3000 VA. The wall
receptacle must be grounded.
12. Turn ON the UPS by pressing the ON button; then turn on the
connected load equipment. The UPS is now providing conditioned
power to your equipment.
+
–
UPStation GXT
AC INPUT BATTERY UPS ON BYPASS
+
–
UPStation GXT
AC INPUT BATTERY UPS ON BYPASS
Vertical
overlay
for
tower
UPS
Horizontal overlay
for rack UPS

Installation
13
4.4 EXTERNAL BATTERY CABINET INSTALLATION
Optional Liebert external battery cabinets may be connected to the UPS
to provide additional battery run time. External battery cabinets are
designed to be placed all on one side of the UPS or stacked beneath the
UPS. There is no limit to the number of external battery cabinets that
can be used but each cabinet will increase the battery recharge time.
1. Visually inspect the external battery cabinet for freight damage.
Report damage to the carrier and your local dealer or Liebert
representative.
2. For slide rail installations, first remove the top/side fin. Top/side
fin slides forward and then lift up to remove. Optional rack-mount
handles are shipped with the external battery cabinet and may be
installed at this time if desired.
3. Securing hardware and slide rails are sold separately. Contact
your local dealer or Liebert representative for these additional
options and any assistance needed. Fasten the slides into position
with the screws per the instructions included with the slide rails.
4. Use the enclosed support bases for the
tower option to prevent tip-over. One
additional set of support base extensions
ships with each external battery cabinet.
5. Connect the supplied external battery
cabinet cable to the rear of the external
battery cabinet, then to the rear of the
UPS.
6. Turn ON the battery breaker on the
rear of the external battery cabinet.
7. The UPS is now equipped with
additional backup battery run time.
For approximate battery run times,
refer to 13.0 - Battery Run Times.
!CAUTION
The external battery cabinet(s) are heavy (see 11.0 -
Specifications). External battery cabinets can be used in
rack-mount or tower configuration. Take proper precautions
when lifting them.
NOTE
You must use the included Configuration Program to specify
the number of external battery cabinets connected to the UPS.
For more information, see 8.0 - Configuration Program.

Controls and Indicators
14
5.0 CONTROLS AND INDICATORS
5.1 ON/ALARM SILENCE/MANUAL BATTERY TEST BUTTON
This button controls output power to connected load(s) and has
three functions:
•ON
•AlarmSilence
•ManualBatteryTest
ON - Pressing this button will start up the UPS in order to
provide conditioned and protected power.
Alarm Silence - To silence alarms, press this button for at least
one second. After the alarm is silenced, the UPStation GXT 2U
will reactivate the alarm system to alert of additional problems.
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, Lie-
bert representative or Liebert Worldwide Support Group.
NOTE
The LOW BATTERY and BYPASS reminder alarms
CANNOT be silenced.
All LEDs illuminated
for illustrative purposes only.

Controls and Indicators
15
5.2 STANDBY/MANUAL BYPASS BUTTON
This button controls output power to connected load(s) and has
dual functions: Standby and Manual Bypass.
5.3 LOAD/BATTERY LEVEL INDICATORS (4 GREEN, 1 AMBER)
The load/battery level indicators have dual functions. During normal
mode operation LED indicators display the approximate electrical
load placed upon the UPS; and during battery mode operation LED
indicators display approximate battery capacity.
The UPStation GXT 2U is equipped with automatic and remote bat-
tery test features. The automatic test occurs every 14 days (this option
is user configurable) if utility has not been interrupted. Should the
battery fail this test, the red Fault indicator LED along with the A and
C diagnostic LEDs will illuminate and an alarm will sound (refer to
10.0 - Troubleshooting). The remote test feature functions with
MultiLink 3 software and can remotely initiate the battery test.
5.4 FAULT INDICATOR LED (RED)
The Fault indicator LED is illuminated if the UPS has detected a
problem. Also, one or more of the load/battery level indicators may be
illuminated (refer to 10.0 - Troubleshooting).
5.5 BYPASS INDICATOR LED (AMBER)
The Bypass indicator LED is illuminated when the UPS is operating
from bypass power. An alarm will sound indicating the UPS detected
a problem, or the manual bypass function has been activated.
5.6 UPS ON INDICATOR LED (GREEN)
The UPS ON indicator LED is illuminated when the UPS inverter is
operating and supplying power to your connected loads.
5.7 BATTERY INDICATOR LED (AMBER)
The Battery indicator LED is illuminated when the UPS is operating
on battery.
!CAUTION
While the UPS is in Normal Mode operation, pressing
the Standby/ Manual Bypass button once will put the
UPS into Bypass Mode.
Once the UPS is in Bypass Mode operation, press the
Standby/ Manual Bypass button two distinct times (for
about one second each time) to turn off the UPS.
Perform all necessary shutdown procedures on
connected loads before turning off the UPS.

Controls and Indicators
16
5.8 AC INPUT INDICATOR LED (GREEN)
The AC Input indicator LED is illuminated when utility power is
available and within the input specifications.
5.9 OUTPUT VOLTAGE SELECTION
The Output Voltage is user configurable and is designed to allow
selecting or changing the desired output voltage to match the utility
via the GXT 2U Configuration Program provided with the UPS. The
settings to choose from are 100, 110, 115, 120, and 127 VAC output.
The factory default setting is 120 VAC.
!CAUTION
Never change the voltage settings while the UPS is ON and
powering connected loads.
NOTE
Setting output voltage to 100 VAC will cause the
UPS unit to be derated (500/700/1000 VA to 90%,
1500/2000/3000 VA to 80% of the VA and Watt
ratings listed in 11.0 - Specifications).