Vertiv Liebert GXT-MT+10KVA User manual

Please comply with all warnings and operating
instructions in this manual strictly. Save this manual
properly and read carefully the following instructions
before installing the unit. Do not operate this unit
before reading through all safety information and
operating instructions carefully.

Table of Contents
1. SAFETY AND EMC INSTRUCTIONS..................................................................................................................................1
1-1. TRANSPORTATIONAND STORAGE......................................................................................................................................1
1-2. PREPARATION.....................................................................................................................................................................1
1-3. INSTALLATION .....................................................................................................................................................................1
1-4. CONNECTION WARNINGS........................................................................................................................................2
1-5. OPERATION.........................................................................................................................................................................3
1-6. STANDARDS........................................................................................................................................................................3
2. INSTALLATION AND OPERATION .....................................................................................................................................4
2-1. UNPACKING AND INSPECTION.............................................................................................................................................4
2-2. REAR PANEL VIEW .............................................................................................................................................................5
2-3. SINGLE UPS INSTALLATION ...............................................................................................................................................6
2-4. UPS INSTALLATION FOR PARALLEL SYSTEM.....................................................................................................................7
2-5. SOFTWARE INSTALLATION..................................................................................................................................................8
3. OPERATIONS..........................................................................................................................................................................9
3-1. BUTTON OPERATION..........................................................................................................................................................9
3-2. LED INDICATORS AND LCD PANEL....................................................................................................................................9
3-3.AUDIBLE ALARM................................................................................................................................................................11
3-4. SINGLE UPS OPERATION ................................................................................................................................................11
3-5. PARALLEL OPERATION......................................................................................................................................................15
3-6.ABBREVIATION MEANING IN LCD DISPLAY ......................................................................................................................17
3-7. LCD SETTING...................................................................................................................................................................17
3-8. OPERATING MODE/STATUS DESCRIPTION......................................................................................................................26
3-9. FAULT CODE ....................................................................................................................................................................28
3-10.WARNING INDICATOR......................................................................................................................................................29
3-11.WARNING CODE..............................................................................................................................................................29
4. TROUBLE SHOOTING ........................................................................................................................................................30
5. STORAGE AND MAINTENANCE......................................................................................................................................32
5-1. STORAGE..........................................................................................................................................................................32
5-2. MAINTENANCE..................................................................................................................................................................32
6. SPECIFICATIONS.................................................................................................................................................................33

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1. Safety and EMC instructions
Please read carefully the following user manual and the safety instructions before installing the unit or using the
unit!
1-1. Transportation and Storage
Please transport the UPS system only in the original package to protect against shock and impact.
The UPS must be stored in the room where it is ventilated and dry.
1-2. Preparation
Condensation may occur if the UPS system is moved directly from cold to warm environment. The
UPS system must be absolutely dry before being installed. Please allow at least two hours for the UPS
system to acclimate the environment.
Do not install the UPS system near water or in moist environments.
Do not install the UPS system where it would be exposed to direct sunlight or nearby heater.
Do not block ventilation holes in the UPS housing.
1-3. Installation
Do not connect appliances or devices which would overload the UPS (e.g. big motor-type
equipment)) to the UPS output sockets or terminal.
Place cables in such a way that no one can step on or trip over them.
Do not block air vents in the housing of UPS. The UPS must be installed in a location with good
ventilation. Ensure enough space on each side for ventilation.
UPS has provided earthed terminal, in the final installed system configuration, equipotential earth
bonding to the external UPS battery cabinets.
The UPS can be installed only by qualified maintenance personnel.
An appropriate disconnect device as short-circuit backup protection should be provided in the
building wiring installation.
An integral single emergency switching device which prevents further supply to the load by the
UPS in any mode of operation should be provided in the building wiring installation.
Connect the earth before connecting to the building wiring terminal.
Installation and Wiring must be performed in accordance with the local electrical laws and
regulations.

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1-4. Connection Warnings
There is no standard backfeed protection inside, please isolate the UPS before working according to this
circuit. The isolation device must be able to carry the UPS input current.
•This UPS should be connected with TN earthing system
•The power supply for this unit must be three-phase rated in accordance with the equipment nameplate. It
also must be suitably grounded
•Use of this equipment in life support applications where failure of this equipment can reasonably be
expected to cause the failure of the life support equipment or to significantly affect its safety or
effectiveness is not recommended. Do not use this equipment in the presence of a flammable anesthetic
mixture with air, oxygen or nitrous oxide.
•Connect your UPS power module’s grounding terminal to a grounding electrode conductor.
•The UPS is connected to a DC energy source (battery). The output terminals may be live when the UPS is
not connected to anAC supply.
Before working on this circuit
-Isolate Uninterruptible Power System (UPS)
-Then check for Hazardous Voltage between all
terminals including the protective earth.
Risk of Voltage Backfeed

3
1-5. Operation
Do not disconnect the earth conductor cable on the UPS or the building wiring terminals in any time
since this would cancel the protective earth of the UPS system and of all connected loads.
The UPS system features its own, internal current source (batteries). The UPS output sockets or
output terminal blocks may be electrically live even if the UPS system is not connected to the building
wiring outlet.
In order to fully disconnect the UPS system, first press the “OFF” button and then disconnect the
mains.
Ensure that no liquid or other foreign objects can enter into the UPS system.
The UPS can be operated by any individuals with no previous experience.
1-6. Standards
* Safety
IEC/EN 62040-1
* EMI
Conducted Emission...............................:IEC/EN 62040-2
Category C3
Radiated Emission..................................:IEC/EN 62040-2
Category C3
*EMS
ESD.........................................................:IEC/EN 61000-4-2
Level 4
RS........................................................ ...:IEC/EN 61000-4-3
Level 3
EFT......................................................... :IEC/EN 61000-4-4
Level 4
SURGE................................................... :IEC/EN 61000-4-5
Level 4
CS........................................................... :IEC/EN 61000-4-6
Level 3
Power-frequency Magnetic field.............. :IEC/EN 61000-4-8
Level 4
Low Frequency Signals............................:IEC/EN 61000-2-2
Warning: This is a product for commercial and industrial application in the
second environment-installation restrictions or additional measures may be
needed to prevent disturbances.

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2. Installation and Operation
We also offer optional parallel function for these two types by request. The UPS with parallel function is called
as “Parallel model”. We have described detailed installation and operation of Parallel Model in the following
chapter.
2-1. Unpacking and Inspection
Unpack the package and check the package contents. The shipping package contains:
● One UPS
●One user manual
● One monitoring software CD
●One RS-232 cable (option)
●One USB cable
●One parallel cable (only available for parallel model)
●One share current cable (only available for parallel model)
NOTE: Before installation, please inspect the unit. Be sure that nothing inside the package is damaged during
transportation. Do not turn on the unit and notify the carrier and dealer immediately if there is any damage or
lacking of some parts. Please keep the original package in a safe place for future use.

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2-2. Rear Panel View
Diagram 1: Rear Panel Diagram 2: Input/Output Terminal
1. RS-232 communication port
2. USB communication port
3. Emergency power off function connector (EPO connector)
4. Share current port (only available for parallel model)
5. Parallel port (only available for parallel model)
6. Intelligent slot
7. Power stage fan
8. External battery connector
9. Bypass Input Circuit Breaker(Only available for dual input unit)
10. Input/Output terminal (Refer to Diagram 5, 6 and 7)
11. Line Input circuit breaker
12. Maintenance bypass switch
13. Output Grounding terminal
14. Output terminal: connect to mission-critical loads
15. Line input terminal

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16. Bypass input terminal(Only available for dual input)
17. Input Grounding terminal
2-3. Single UPS Installation
Installation and wiring must be performed in accordance with the local electric laws/regulations and execute the
following instructions by professional personnel.
1) Make sure the mains wire and breakers in the building are enough for the rated capacity of UPS to avoid
the hazards of electric shock or fire.
NOTE: Do not use the wall receptacle as the input power source for the UPS, as its rated current is less than
the UPS’s maximum input current. Otherwise the receptacle may be burned and destroyed.
2) Switch off the mains switch in the building before installation.
3) Turn off all the connected devices before connecting to the UPS.
4) Prepare wires based on the following table:
Model
Wiring spec (AWG)
Input(Ph)
Output(Ph)
Neutral
Battery
Ground
GXT-MT+ 10KVA LX (3x3) LB
10
10
8
8
8
NOTE 1: The cable should be able to withstand over 40A current. It is recommended to use AWG 10 or
thicker wire for Phase and AWG 8 or thicker wire for Neutral for safety and efficiency.
NOTE 2: The selections for color of wires should be followed by the local electrical laws and regulations.
5) Remove the terminal block cover on the rear panel of UPS. Then connect the wires according to the
following terminal block diagrams: (Connect the earth wire first when making wire connection. Disconnect the
earth wire last when making wire disconnection!)
NOTE: For single utility power system, connect input terminals to the AC power source and connect input and
bypass input together (shows dashed line in below wiring diagrams)
Terminal Block wiring diagram
NOTE 1: Make sure that the wires are connected tightly with the terminals.
NOTE 2: Please install the output breaker between the output terminal and the load, and the breaker should be
qualified with leakage current protective function if necessary.
6) Put the terminal block cover back to the rear panel of the UPS.

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Warning: (Only for standard model)
● Make sure the UPS is not turned on before installation. The UPS should not be turned on during wiring
connection.
● Do not try to modify the standard model to the long-run model. Particularly, do not try to connect the
standard internal battery to the external battery. The battery type and voltage may be different. If you
connect them together, it maybe causes the hazard of electric shock or fire!
Warning: (Only for long-run model)
● Make sure a DC breaker or other protection device between UPS and external battery pack is installed. If
not, please install it carefully. Switch off the battery breaker before installation.
NOTE: Set the battery pack breaker in “OFF” position and then install the battery pack.
● Pay highly attention to the rated battery voltage marked on the rear panel. If you want to change the
numbers of the battery pack, please make sure you modify the setting simultaneously. The connection with
wrong battery voltage may cause permanent damage of the UPS. Make sure the voltage of the battery
pack is correct.
● Pay highly attention to the polarity marking on external battery terminal block, and make sure the correct
battery polarity is connected. Wrong connection may cause permanent damage of the UPS.
● Make sure the protective earth ground wiring is correct. The wire current spec, color, position, connection
and conductance reliability should be checked carefully.
● Make sure the utility input & output wiring is correct. The wire current spec, color, position, connection and
conductance reliability should be checked carefully. Make sure the L/N site is correct, not reverse and
short-circuited.
2-4. UPS Installation for Parallel System
If the UPS is only available for single operation, you may skip this section to the next.
1) Install and wires the UPSs according to the section 2-3.
2) Connect the output wires of each UPS to an output breaker.
3) Connect all output breakers to a major output breaker. Then this major output breaker will directly connect
to the loads.
4) Each UPS is connected to an independent battery pack.
NOTE: The parallel system can not use one battery pack. Otherwise, it will cause system permanent failure.
5) Refer to the following wiring diagram:

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Wiring diagram of parallel system
2-5. Software Installation
For optimal computer system protection, install UPS monitoring software to fully configure UPS shutdown.

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3. Operations
3-1. Button Operation
Button
Function
ON/Enter Button
Turn on the UPS: Press and hold the button more than 0.5s to turn on the UPS.
Enter Key: Press this button to confirm the selection in setting menu.
OFF/ESC Button
Turn off the UPS: Press and hold the button more than 0.5s to turn off the UPS.
Esc key: Press this button to return to last menu in setting menu.
Test/Up Button
Battery test: Press and hold the button more than 0.5s to test the battery while in
AC mode and CVCF* mode.
UP key: Press this button to display next selection in setting menu.
Mute/Down Button
Mute the alarm: Press and hold the button more than 0.5s to mute the buzzer.
Please refer to section 3-4-9 for details.
Down key: Press this button to display previous selection in setting menu.
Test/Up +
Mute/Down Button
Press and hold the two buttons simultaneous more than 1s to enter/escape the
setting menu.
* CVCF means Constant Voltage and Constant Frequency.
3-2. LED Indicators and LCD Panel
LED Indicators:
There are 4 LEDs on front panel to show the UPS working status:
Mode LED
Bypass
Line
Battery
Fault
UPS On
●
●
●
●
No Output mode
○
○
○
○
Bypass mode
●
○
○
○
AC mode
○
●
○
○
Battery mode
○
○
●
○
CVCF mode
○
●
○
○
Battery Test
●
●
●
○
ECO mode
●
●
○
○
Fault
○
○
○
●
Note: ●means LED is lighting, and ○means LED is faded.
LCD panel
LED indicators

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LCD Panel:
Display
Function
Backup time information
、
Indicates the battery discharge time in numbers
H: hours, M: minutes, S: seconds
Fault information
Indicates that the warning and fault occurs.
Indicates the fault codes, and the codes are listed in details in section 3-9.
Mute operation
Indicates that the UPS alarm is disabled.
Output & Battery voltage information
Indicates the input and output voltage, frequency, battery voltage, load
information, and internal temperature.
Vac: input/output voltage, Vdc: battery voltage, Hz: frequency, %: load level,
°C/°F: temperature,
Load information
Indicates the load level by 0-25%, 26-50%, 51-75%, and 76-100%.
Indicates overload.
Indicates the load or the output is short.
Mode operation information
Indicates the UPS connects to the mains.
Indicates the battery is working.
Indicates the bypass circuit is working.
Indicates the ECO mode is enabled.
Indicates the UPS is in CVCF mode.
Indicates the UPS is charging battery.
Battery information

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Indicates the Battery capacity by 0-25%, 26-50%, 51-75%, and 76-100%.
Indicates the battery is not connected.
Indicates low battery level and low battery voltage.
3-3. Audible Alarm
Description
Buzzer status
Muted
UPS status
Bypass mode
Beeping once every 2 minutes
Yes
Battery mode
Beeping once every 4 seconds
Fault mode
Beeping continuously
Warning
Overload
Beeping twice every second
No
Others
Beeping once every second
Fault
All
Beeping continuously
Yes
3-4. Single UPS Operation
1. Turn on the UPS with utility power supply (in AC mode)
1) After power supply is connected correctly, set the breaker of the battery pack at “ON”position (the step
only available for long-run model). Then set the line input breaker at “ON”position(for dual input unit,
also set the bypass input breaker at “ON”). At this time the fan is running and the UPS enter to power
on mode for initialization, several seconds later, UPS operates in Bypass mode and supplies power to
the loads via the bypass.
NOTE: When UPS is in Bypass mode, the output voltage will directly power from utility after you switch
on the input breaker. In Bypass mode, the load is not protected by UPS. To protect your precious
devices, you should turn on the UPS. Refer to next step.
2) Press and hold the “ON” button for 0.5s to turn on the UPS and the buzzer will beep once.
3) A few seconds later, the UPS will enter to AC mode. If the utility power is abnormal, the UPS will
operate in Battery mode without interruption.
NOTE: When the UPS is running out battery, it will shut down automatically at Battery mode. When the
utility power is restored, the UPS will auto restart inAC mode.
2. Turn on the UPS without utility power supply (in Battery mode)
1) Make sure that the breaker of the battery pack is at “ON”position (only for long-run model).
2) Press the “ON” button to set up the power supply for the UPS, UPS will enter to power on mode. After
initialization UPS will enter to No Output mode, then Press and hold the “ON” button for 0.5s to turn on
the UPS, and the buzzer will beep once.
3) A few seconds later, the UPS will be turned on and enter to Battery mode.
3. Connect devices to UPS
After the UPS is turned on, you can connect devices to the UPS.
1) Turn on the UPS first and then switch on the devices one by one, the LCD panel will display total load
level.
2) If it is necessary to connect the inductive loads such as a printer, the in-rush current should be
calculated carefully to see if it meets the capacity of the UPS, because the power consumption of this

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kind of loads is too big.
3) If the UPS is overload, the buzzer will beep twice every second.
4) When the UPS is overload, please remove some loads immediately. It is recommended to have the
total loads connected to the UPS less than 80% of its nominal power capacity to prevent overload for
system safety.
5) If the overload time is over acceptable time listed in spec at AC mode, the UPS will automatically
transfer to Bypass mode. After the overload is removed, it will return to AC mode. If the overload
time is over acceptable time listed in spec at Battery mode, the UPS will become fault status. At this
time, if bypass is enabled, the UPS will power to the load via bypass. If bypass function is disabled or
the input power is not within bypass acceptable range, it will cut off output directly.
4. Charge the batteries
1) After the UPS is connected to the utility power, the charger will charge the batteries automatically
except in Battery mode or during battery self-test.
2) Suggest to charge batteries at least 10 hours before use. Otherwise, the backup time may be shorter
than expected time.
3) Make sure the battery number setting on the control board (Please refer to the section 3-4-12
Operation of changing battery numbers for detailed setting) is consistent to real connection.
4) Check charger current of the charger board
It’s necessary to open the UPS case to check charger current setting in this step. There is a JP1
located on charger board. If there is no jumper on JP1, it means 4A charger current. If there is one
jumper on Pin1&Pin2 on JP1, it means 2Acharger current. If there is one jumper on Pin2&Pin3 of JP1,
it means 1A charger current.
Charger board overlook

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JP1 located on charger board
5. Battery mode operation
1) When the UPS is in Battery mode, the buzzer will beep according to different battery capacity. If the
battery capacity is more than 25%, the buzzer will beep once every 4 seconds; If the battery voltage
drops to the alarm level, the buzzer will beep quickly (once every sec) to remind users that the battery
is at low level and the UPS will shut down automatically soon. Users could switch off some non-critical
loads to disable the shutdown alarm and prolong the backup time. If there is no more load to be
switched off at that time, you have to shut down all loads as soon as possible to protect the devices or
save data. Otherwise, there is a risk of data loss or load failure.
2) In Battery mode, if buzzer sound annoys, users can press the Mute button to disable the buzzer.
3) The backup time of the long-run model depends on the external battery capacity.
4) The backup time may vary from different environment temperature and load type.
5) When setting backup time for 16.5 hours (default value from LCD panel), after discharging 16.5 hours,
UPS will shut down automatically to protect the battery. This battery discharge protection can be
enabled or disabled through LCD panel control. (Refer to 3-7 LCD setting section)
6. Test the batteries
1) If you need to check the battery status when the UPS is running in AC mode/CVCF mode, you could
press the “Test”button to let the UPS do battery self-test.
2) Users also can set battery self-test through monitoring software.
7. Turn off the UPS with utility power supply in AC mode
1) Turn off the inverter of the UPS by pressing “OFF” button for at least 0.5s, and then the buzzer will
beep once. The UPS will turn into Bypass mode.
NOTE 1: If the UPS has been set to enable the bypass output, it will bypass voltage from utility power
to output terminal even though you have turned off the UPS (inverter).
NOTE 2: After turning off the UPS, please be aware that the UPS is working at Bypass mode and there
is risk of power loss for connected devices.
2) In Bypass mode, output voltage of the UPS is still present. In order to cut off the output, switch off the
line input breaker(for dual input unit, also switch off the bypass line breaker). A few seconds later,
there is no display shown on the display panel and UPS is complete off.
8. Turn off the UPS without utility power supply in Battery mode
1) Turn off the UPS by pressing “OFF” button for at least 0.5s, and then the buzzer will beep once.
2) Then UPS will cut off power to output and there is no display shown on the display panel.
9. Mute the buzzer
1) To mute the buzzer, please press the “Mute” button for at least 0.5s. If you press it again after the
buzzer is muted, the buzzer will beep again.

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2) Some warning alarms can’t be muted unless the error is fixed. Please refer to section 3-3 for the
details.
10. Operation in warning status
1) When Fault LED flashes and the buzzer beeps once every second, it means that there are some
problems for UPS operation. Users can get the warning indicator from LCD panel. Please check the
trouble shooting table in chapter 4 for details.
2) Some warning alarms can’t be muted unless the error is fixed. Please refer to section 3-3 for the
details.
11. Operation in Fault mode
1) When Fault LED illuminates and the buzzer beeps continuously, it means that there is a fatal error in
the UPS. Users can get the fault code from display panel. Please check the trouble shooting table in
chapter 4 for details.
2) Please check the loads, wiring, ventilation, utility, battery and so on after the fault occurs. Don’t try to
turn on the UPS again before solving the problems. If the problems can’t be fixed, please contact the
distributor or service people immediately.
3) For emergency case, please cut off the connection from utility, external battery, and output
immediately to avoid more risk or danger.
12. Operation of changing battery numbers
1) This operation is only available for professional or qualified technicians.
2) Turn off the UPS. If the load couldn’t be cut off, you should remove the cover of maintenance bypass
switch on the rear panel and turn the maintenance switch to “BPS” position first.
3) Switch off the line input breaker(for dual input unit, also switch off the bypass input breaker), and
switch off the battery breaker (only available for long-run model).
4) Remove the cabinet cover, and disconnect battery wire for standard model. Then modify the jumper of
JS3 on the control board to set the battery numbers as following table.
Battery Number in
series
JS3
pin1 & pin2
pin3 & pin4
Pin5 & pin6
pin7 & pin8
18
1
0
0
X
19
0
1
0
X
20
0
0
1
X
Note:1 = connect with jumper; 0 = no jumper; x = the pins are for other functions.
5) Modify the battery pack for the setting number carefully. After complete it, put the cover back, switch
on the battery breaker for long-run model.
6) Switch on the line input breaker(for dual input unit, also switch on the bypass input breaker) and the
UPS will enter Bypass mode. If the UPS is in maintenance Bypass mode, turn the maintenance switch
to “UPS” position and then turn on the UPS.
13. Changing Input Voltage Range through OVCD Board
There is a three-phase OVCD board installed between input breaker and IP EMI board. When any
over-voltage or under voltage occurs on input of any phase, three-phase OVCD relay will cut off the input
power to protect the UPS. The input voltage range can be set up through JP16/JP19 on the OVCD board
as below table.

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Jumper
High voltage cut
off (V)
High voltage cut
off come back
(V)
Low voltage cut
off (V)
Low voltage cut
off come back
(V)
JP18=0 /JP19=0
307
297
139
159
JP18=1 /JP19=0
267
252
139
159
JP18=0 /JP19=1
307
297
90
100
JP18=1 /JP19=1
267
252
90
100
*1: With jumper connected. 0: NO jumper connected.
**Default setting is JP18=0 /JP19=1.
3-5. Parallel Operation
1. Parallel system initial startup
First of all, please make sure all of the UPSs are parallel models and have the same configuration.
1) Turn on each UPS to AC mode respectively (Refer to section 3-4(1)). Then, measure the inverter
output voltage of each phase for each UPS to check if the inverter voltage difference between actual
output and setting value is less than 1.5V (typical 1V) with multimeter. If the difference is more than
1.5V, please calibrate the voltage by configuring inverter voltage adjustment (Refer to Program 15, 16
and 17, section 3-7) in LCD setting. If voltage difference remains more than 1.5V after calibration,
please contact your local distributor or service center for help.
2) Calibrate the output voltage measurement by configuring output voltage calibration (Refer to Program
18, 19, and 20, section 3-7) in LCD setting to make sure the difference between real output voltage
and detected value of UPS is less than 1V.
3) Turn off each UPS (Refer to section 3-4(7.)). Then, follow the wiring procedure in section 2-4.
4) Remove the cover of parallel share current cable port on the UPS, connect each UPS one by one with
the parallel cable and share current cable, and then screw the cover back.
5) Turn on the parallel system in AC mode:
a) Turn on the line input breaker of each UPS(for dual input, also turn on bypass input breaker).
After all UPSs enter to bypass mode, measure the output voltage between two UPS for the same
phase to make sure the phase sequence is correct . If these two voltage differences are near to
zero, that means all connections are correct. Otherwise, please check if the wirings are
connected correctly.
b) Turn on the output breaker of each UPS.
c) Turn on each UPS in turns.After a while, the UPSs will enter to AC mode synchronously and then,
the parallel system is completed.
6) Turn on the parallel system in Battery mode:
a) Turn on the battery breaker (only available in long-run model) and output breaker of each UPS.
NOTE: It’s not allowed to share one battery pack for long-run UPSs in parallel system. Each UPS
should be connected to its battery pack.
b) Turn on any UPS. A few seconds later, the UPS will enter to battery mode.
c) Then, turn on another UPS.Afew seconds later, the UPS will enter to battery mode and add to the
parallel system.
d) If you have the third UPS, follow the same procedure of c). Then, the parallel system is complete.
If more detailed information is needed, please contact supplier or service center for parallel operation
instruction.

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2. Add one new unit into the parallel system
1) You can not add one new unit into the parallel system when whole system is running. You must cut off
the load and shutdown the system.
2) Make sure all of the UPS are the parallel models, and follow the wiring refer to section 2-4.
3) Install the new parallel system refers to the previous section.
3. Remove one unit from the parallel system
There are two methods to remove one unit from the parallel system:
First method:
1) Press the “OFF” key twice and each time should be lasted for more than 0.5s. Then, the UPS will enter
into bypass mode or no output mode without output.
2) Turn off the output breaker of this unit, and then turn off the input breaker of this unit.
3) After it shuts down, you can turn off the battery breaker (for long-run model) and remove the parallel
and share current cables.And then remove the unit from the parallel system.
Second method:
1) If the bypass is abnormal, you can not remove the UPS without interruption. You must cut off the load
and shut down the system first.
2) Make sure the bypass setting is enabled in each UPS and then turn off the running system. All UPSs
will transfer to Bypass mode. Remove all the maintenance bypass covers and set the maintenance
switches from “UPS” to “BPS”. Turn off all the input breakers and battery breakers in parallel system.
3) Turn off the output breaker and remove the parallel cable and share current cable of the UPS which
you want to remove. Then, remove it from parallel system.
4) Turn on the input breaker of the remaining UPS and the system will transfer to Bypass mode. Set the
maintenance switches from “BPS” to “UPS and put the maintenance bypass covers back.
5) Turn on the remaining UPS according to the previous section.
Warning: (Only for the parallel system)
● Before turning on the parallel system to activate inverter, make sure that all unit’s maintenance switch at
the same position.
● When parallel system is turned on to work through inverter, please do not operate the maintenance
switch of any unit.

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3-6. Abbreviation Meaning in LCD Display
Abbreviation
Display content
Meaning
ENA
Enable
DIS
Disable
ATO
Auto
ON
On
OFF
Off
FBD
Not allowed
OPN
Allow
CHE
Check
RES
Reserved
L1
The first line
L2
The second line
L3
The third line
3-7. LCD Setting
3-7-1. LCD Main Interface
A. Single model: Press up and down key to select the displayed information.
1 Output L1 Voltage
2 Output L2 Voltage
3 Output L3 Voltage
4 Output Frequency
5 Battery Voltage
6 Load Level