Liebert 2700VA User manual

POWER AVAILABILITY
UPStation GXT 2U™ USER MANUAL
2700VA
208V

i
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . 1
GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MAJOR COMPONENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Transient Voltage Surge Suppression (TVSS) and EMI/RFI Filters . . . 5
Rectifier/Power Factor Correction (PFC) Circuit . . . . . . . . . . . . . . . . . . 5
Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DC to DC Converter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dynamic Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GXT 2U (Rear View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Tower UPS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Rack-Mount UPS Conversion and Installation. . . . . . . . . . . . . . . . . . . . 9
External Battery Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CONTROLS AND INDICATORS. . . . . . . . . . . . . . . . . . . . . . . . . 14
ON/Alarm Silence/Manual Battery Test Button . . . . . . . . . . . . . . . . . . 14
Standby/Manual Bypass Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Load/Battery Level Indicators (4 Green, 1 Amber) . . . . . . . . . . . . . . . 15
Fault Indicator LED (Red) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Bypass Indicator LED (Amber) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
UPS ON Indicator LED (Green) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Battery Indicator LED (Amber). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
AC Input Indicator LED (Green). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Output Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Normal Mode Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bypass Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Battery Mode Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Battery Recharge Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

ii
COMMUNICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Communications Interface Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Pins 4 & 5 - Remote Shutdown on Battery . . . . . . . . . . . . . . . . . . . . . 19
Pins 5 & 6 - Any-Mode Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Auto-Enable Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Pin 6 Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
UPS Intelligent Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CONFIGURATION PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . 22
GXT 2U Configuration Program Abilities . . . . . . . . . . . . . . . . . . . . . . . 22
What You Will Need . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Internal Battery Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . 24
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
BATTERY CABINET SPECIFICATIONS . . . . . . . . . . . . . . . . . . . 31
BATTERY RUN TIMES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Product Warranty Registration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

1
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important safety instructions. Read all safety, instal-
lation, and operating instructions before operating the Uninterruptible
Power System (UPS). Adhere to all warnings on the unit and in this man-
ual. Follow all operating and user instructions. Individuals without previ-
ous training can install and operate this equipment.
It is not intended for use with life support and other designated “critical”
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, 208V supply (programmable for 200, 208, 220, 230, and 240VAC
output). Installation instructions and warning notices are located in this
manual.
ELECTROMAGNETIC COMPATIBILITY—The GXT 2U™ Series com-
plies with the limits for a CLASS A DIGITAL DEVICE, PURSUANT 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 tempera-
ture range of 32°F to +104°F (0°C to +40°C). Install it in a clean environ-
ment, free from moisture, flammable liquids, gases and corrosive
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 battery
pack. The UPS ON/Standby push buttons do not electrically isolate inter-
nal 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 indications are not in accor-
dance 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 unautho-
rized personnel away from the batteries. PROPER DISPOSAL OF BAT-
TERIES 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 open-
ings 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 cor-
ruption.
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.

3
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

4
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 trans-
mission and distribution it may be subject to voltage sags, spikes, or com-
plete power failure that may interrupt computer operations, cause data
loss, or even damage equipment. The UPStation GXT 2U protects equip-
ment from these disturbances.
The UPStation GXT 2U is rated for 2700 VA, 1890 watts. Complete model
specifications appear at the end of this manual.
The UPStation GXT 2U is a compact, “on-line” UPS. An on-line UPS con-
tinuously conditions and regulates its output voltage, whether utility 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 pro-
vides detailed operating information including voltages, currents, and
alarm status to the host system when used in conjunction with Liebert
MultiLink™ software. MultiLink software can also remotely control UPS
operation.

5
MAJOR COMPONENTS
TRANSIENT VOLTAGE SURGE SUPPRESSION (TVSS) AND EMI/RFI
FILTERS
These UPS components provide surge protection and filter both electro-
magnetic interference (EMI) and radio frequency interference (RFI). They
minimize any surges or interference present in the utility line and keep the
sensitive equipment protected.
RECTIFIER/POWER FACTOR CORRECTION (PFC) CIRCUIT
In normal operation, the rectifier/power factor correction (PFC) circuit con-
verts 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 build-
ing not being protected by the UPStation GXT 2U.
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

6
BATTERY CHARGER
The battery charger utilizes energy from the utility power and precisely
regulates it to continuously “float charge” the batteries. The batteries are
being charged whenever the UPStation GXT 2U is plugged in, even when
the UPS is not turned on.
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 optimum efficiency
and voltage, thus increasing reliability.
BATTERY
The UPStation GXT 2U utilizes valve-regulated, nonspillable, flame retar-
dant, 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 exter-
nal battery cabinets are available to extend battery run times.
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 opera-
tion is indicated by an audible alarm and illuminated amber Bypass LED
(other LEDs may be illuminated to indicate the diagnosed 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.

7
GXT 2U (REAR VIEW)
Input Circuit
Breaker
(20 amp)
AC Input
(L6-20)
Output
Receptacles
(L6-15R)
External
Battery
Connector
Cooling
Fans
Intellislot®
Port
DB-9
Communications Port
Output
Receptacle
(L6-20R)
Support
Base

8
INSTALLATION
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 con-
trolled 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 inches (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. Deter-
mine the type of installation and follow the appropriate instructions in
either Tower UPS Installation or Rack-Mount UPS Conversion
and Installation.
TOWER UPS INSTALLATION
When using the GXT 2U in a tower configuration, use the included sup-
port base (shown below, left) to stabilize the UPS.
If any battery cabinets are added, they will include spacers to accommo-
date the additional cabinets (shown below, right).
!CAUTION
The UPS is heavy (see Specifications section). 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

9
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 interchange-
able 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.
+
–
ACINPUTBATTERYUPSONBYPASS
UPStation GXT
Optional rack mount handles
Return
flanges
Inner
members
Retaining
latches
Front
members
Rear
members

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 mount-
ing rails. Insert screws loosely
(finger-tight) into top and bot-
tom holes of return flange on
rear member. Extend bracket
assembly by sliding front
member forward 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 fig-
ures at right. For maximum
support, locate fasteners for
each bracket assembly as far
apart as possible, depending
on rack depth, while still join-
ing both members (See fig-
ures 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

11
5. Prepare the UPS or battery cab-
inet (the “equipment”) for rack
mounting by following instruc-
tions 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 pre-
pared, 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
as shown in the figure at right.
6. Open grease packet pro-
vided in this kit. Apply a 1"
long bead of grease four
(4) places inside the bot-
tom, 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 mem-
bers into the top and bottom, curved tracks of front members and slid-
ing 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 hori-
zontal position to insert the top edges of
inner members before sliding the equip-
ment into rack (see figure at right). The equipment should move
smoothly into bracket assemblies. 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

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 equip-
ment should be secured to front of rack mounting rails with four (4)
customer-supplied fasteners.
9. To orient the display for horizon-
tal 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 con-
nected. Ensure the load equip-
ment 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 pro-
tected by a circuit breaker or
fuse in accordance with national
and local electrical codes. Use a 20 amp rated device for the 2700VA,
208V unit. The wall receptacle must be grounded.
12. Turn ON the UPS by pressing the ON button; then turn on the con-
nected 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

13
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 han-
dles 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. Please 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 cab-
inet cable to the rear of the external bat-
tery 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 addi-
tional backup battery run time. For
approximate battery run times, refer to
the Battery Run Times charts in this
manual.
!CAUTION
The external battery cabinet(s) are heavy (see
Specifications section). 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 Configuration Program on
page 22.

14
CONTROLS AND INDICATORS
ON/Alarm Silence/Manual Battery Test Button
This button controls output power to connected load(s) and has
three functions:
•ON
• Alarm Silence
• Manual Battery Test
ON - Pressing this button will start up the UPS in order to provide condi-
tioned and protected power.
Alarm Silence - To silence alarms, press this button for at least one sec-
ond. 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 but-
ton 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, Liebert representative or
Liebert Worldwide Support Group.
NOTE
The LOW BATTERY and BYPASS reminder alarms
CANNOT be silenced.
All LEDs illuminated
for illustrative purposes only.

15
Standby/Manual Bypass Button
This button controls output power to connected load(s) and has
dual functions: Standby and Manual Bypass.
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 battery
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 Troubleshooting section).
The remote test feature functions with MultiLink 3 software and can
remotely initiate the battery test.
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 Troubleshooting section).
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 prob-
lem, or the manual bypass function has been activated.
UPS ON Indicator LED (Green)
The UPS ON indicator LED is illuminated when the UPS inverter is oper-
ating and supplying power to your connected loads.
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.

16
AC Input Indicator LED (Green)
The AC Input indicator LED is illuminated when utility power is available
and within the input specifications.
Output Voltage Selection
The Output Voltage is user configurable and is designed to allow select-
ing 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 200, 208, 220, 230, and 240 VAC output. The factory
default setting is 208 VAC.
!CAUTION
Never change the voltage settings while the UPS is ON and
powering connected loads.
NOTE
Setting output voltage to 200 VAC will cause the UPS unit to
be derated to 2400 VA, 1680 watts.