Omron BU5002R User manual

Uninterruptible Power Supply
(UPS/200 to 240 V model)
BU5002R/BU3002R/BU3002RH
Instruction Manual
BU 3 0 0 2 R/BU 3 0 0 2 RH
BU5002R
The English translation is for reference purposes only.
⚫This instruction manual provides important safety-related information. Thoroughly read and
understand this manual before installing and using the product.
⚫Keep this instruction manual in a convenient location so that you can refer to it whenever
necessary. No part or whole of this instruction manual may be reproduced without permission.
⚫The contents of this instruction manual are subject to change without notice.
⚫The warranty certificate is included in the product package.

Introduction
BU5002R/BU3002R/BU3002RH
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Introduction
Thank you for purchasing the Omron's Uninterruptible Power Supply (hereafter, “UPS”).
This instruction manual contains the necessary information for use of the Omron UPS.
Thoroughly read this instruction manual and sufficiently understand the functions and performance of
the unit prior to use.
Also, after reading it, store this instruction manual carefully so that it is always available nearby for
use.
Target readers
The following are the target readers for this instruction manual.
•Those having electrical knowledge (electrician or equivalent knowledge), that will be
responsible for installation/operation of the UPS.
Features of this product
•A UPS protects computers and other devices from power outages, voltage variations,
instantaneous voltage drops, and surge voltage such as that caused by lightning (a
phenomenon in which extraordinary high voltage occurs instantaneously).
•The power supply input specification of the UPS is 200 to 240 VAC, and the power
output is selectable from 100 VAC or 200 to 240 VAC.
•In regular state, the UPS converts a commercial power supply into direct current,
reconverts it into a stable sine-wave alternative current, and then outputs the converted
voltage. This product uses a full-time inverter supply method in which power is supplied
from the battery when any abnormalities are detected in the commercial power supply
such as power failure and voltage variations in order to continue sine-wave output. This
product is suitable for use in locations with poor power supply environment, such as
significant voltage fluctuation.
•The maximum output capacity is as follows: 5000 VA/4500 W for BU5002R, 3000
VA/2700 W for BU3002R, and 3000 VA/2700 W for BU3002RH.

Introduction
BU5002R/BU3002R/BU3002RH
3
Notes on the use of the UPS
•This product is designed and manufactured for use with FA or OA equipment such as
computers.
Do not use it when very high reliability and safety are required as listed below.
• Usage on medical equipment that directly associated with human life
• Usage on devices that may cause injury (such as those directly associated with operation or
control of planes, ships, or railroads and so on.)
• Environment with constant vibration, such as vehicles or marine vessels
• Usage on devices whose failure may cause significant damage or effect on the society or public
(important computer systems, main communication equipment, public transportation systems,
and so on)
• Equipment with the same level of importance
•For equipment that greatly affects the safety of people and maintenance of public
functions, special considerations related to operation, maintenance, and management
must be taken such as duplicating the system or using an emergency power generator.
•Observe the conditions and environments for use described in this instruction manual.
•If you want to use this product for an important system that requires very high reliability,
contact the shop of purchase.
•Do not modify/alter this product.
•This product is designed to be used only in Japan.
• It does not support power supplies outside Japan so using it outside Japan may cause a failure
or result in fire. This product is not compliant with laws and regulations outside Japan.
• We assume no responsibility for exporting this product outside Japan or using it outside Japan
at the customer’s discretion and under their own responsibilities.
• When exporting this product at the customer’s discretion (including carrying it in personally),
the permission of the Ministry of Economy, Trade and Industry may be required in accordance
with the Foreign Exchange and Foreign TradeAct. Exporting this product without acquiring the
required permissions will be punishable based on these laws.
•This UPS cannot be used in computer rooms complying with the standard
ANSI/NFPA75 in order to protect electronic computers/data processing devices.

Introduction
BU5002R/BU3002R/BU3002RH
4
Voluntary Control Council for Interference by
Information Technology Equipment (VCCI)
Applicable Class
This unit is a class A product. In a residential environment, this unit may cause radio
interference, in which case the user may be required to take additional measures. VCCI-A
Disclaimers
The company accepts no responsibility for damage, including all damage caused by non-compliance
with the procedures from installation to operation including the safety precautions described later,
and damage caused by a fault or breakdown of equipment, connected device, or software in the
event of a breakdown caused by use of the product, and other secondary damage.
⚫Make sure to read the safety precautions before using the unit.
⚫In the event you transfer or sell this unit to a third party, please include all of the documentation
that came with this unit. This is to ensure that the unit is used in line with the conditions described
in the included documentation.
● Windows is the registered trademark of Microsoft Corporation in the United States and/or other
countries.
● The names of other companies and products mentioned herein are the trademarks or registered
trademarks of their respective owners.
©OMRON SOCIAL SOLUTIONS CO., LTD. 2020 All Rights Reserved.

Procedure from installation to operation
BU5002R/BU3002R/BU3002RH
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Procedure from installation to
operation
Procedure from installation to operation is as follows.

Table of Contents
BU5002R/BU3002R/BU3002RH
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Table of Contents
Introduction..................................................................................................2
Target readers..............................................................................................................2
Features of this product ...............................................................................................2
Notes on the use of the UPS........................................................................................3
Voluntary Control Council for Interference by Information Technology Equipment
(VCCI) Applicable Class...............................................................................................4
Procedure from installation to operation ......................................................5
Table of Contents.........................................................................................6
Safety precautions.......................................................................................8
1 Preparation.............................................................................................24
1-1 Unpacking the product.........................................................................................24
1-2 Checking the contents .........................................................................................24
1-3 Related products (options)...................................................................................26
1-4 Names of each part..............................................................................................27
1-5 I/O circuit block diagram ......................................................................................29
2 Installation and connection .....................................................................30
2-1 Precautions and notes on installation and connection........................................30
2-2 Installation............................................................................................................31
2 2-1 Rackmountinstallation(EIA/JIS19-inchrack,serverrack).............................................................32
2-2-2 Stationary installation.........................................................................................................38
2-3 Connecting the equipment...................................................................................43
2-3-1 Connecting devices to the AC output (AC receptacle) (BU5002R only).............................44
2-3-2 Connecting a device to the AC output (AC receptacle) (BU3002R only) ...........................44
2-3-3 Connecting a device to the AC output (terminal block) (BU5002R, BU3002R only) ..........47
2-3-4 Connecting to a computer..................................................................................................50
2-4 Connecting theAC input......................................................................................51
2-4-1 Connecting the AC input plug ............................................................................................51
2-4-2 Connecting to the AC input terminal block (BU5002R/BU3002RH)...................................52
2-5 Connecting the expansion battery unit................................................................57
3 Checking and starting the operation .......................................................60
3-1 Names and functions of each part of the operation and display sections...........60
3-1-1 Name of each part.............................................................................................................60
3-1-2 Meaning of each LED indicator..........................................................................................60
3-1-3 Switch................................................................................................................................61
3-1-4 Buzzer sound.....................................................................................................................62
3-1-5 Status screen on the LCD..................................................................................................63
3-1-6 Status screen example ......................................................................................................65
3-1-7 How to interpret icons, LED, and buzzer sounds...............................................................66
3-1-8 Text displayed at bottom....................................................................................................74
3-1-9 Changing the language setting..........................................................................................74
3-1-10 Calendar settings.............................................................................................................75
3-2 Checking the operation........................................................................................76
3-3 Basic operations including running and stopping the UPS .................................79
3-3-1 How to start/stop the UPS operation..................................................................................79
3-4 Operations using the LCD menu .........................................................................83
3-4-1 UPS setting menu..............................................................................................................83
3-4-2 LCD menu item list ............................................................................................................85

Table of Contents
BU5002R/BU3002R/BU3002RH
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3-5 Charging the battery ............................................................................................92
3-6 Measuring the initial value of backup time...........................................................92
3-7 Recharging the battery.........................................................................................93
4 Maintenance and inspection ...................................................................94
4-1 Self-diagnosis test................................................................................................94
4-2 Checking the battery............................................................................................95
4-2-1 Batterylife expectancy (* Not guaranteed performance)........................................................95
4-2-2 Methods for checking the battery.......................................................................................95
4-3 Measuring the backup time..................................................................................96
4-3-1 How to measure backup time ............................................................................................96
4-3-2 Estimated backup time ......................................................................................................97
4-4 Replacing the battery.........................................................................................100
4-4-1 Notification that the battery needs to be replaced............................................................102
4-4-2 Battery replacement method............................................................................................102
4-5 Replacing the fan...............................................................................................108
4-5-1 Fan replacement procedure.............................................................................................109
4-6 Cleaning the unit................................................................................................113
5 Using the shutdown software................................................................ 114
6 Contact signal....................................................................................... 115
6-1 Contact signal ....................................................................................................115
6-1-1 Contact signal..................................................................................................................115
6-1-2 Signal output....................................................................................................................116
6-1-3 Signal input......................................................................................................................116
6-1-4 Contact signal I/O connector (DSUB9P female)..............................................................117
6-1-5 Contact signal ratings......................................................................................................117
6-1-6 Contact signal circuit inside the UPS...............................................................................118
6-1-7 Examples of use of contact signal circuits .......................................................................119
6-1-8 Precautions and notes for the use of the contact signal ..................................................119
7 Using an optional card..........................................................................120
7-1 Mounting an optional card .................................................................................120
7-2 Optional card......................................................................................................121
7-2-1 Contact signal I/O card (SC08)........................................................................................121
7-2-2 Overview of network card (SC21) and SNMP/Web card (SC20G2) ................................122
8 Troubleshooting....................................................................................123
Reference documents..............................................................................127
A. Specifications.......................................................................................................127
B. External dimensions ............................................................................................129
C. Battery life............................................................................................................134

Safety precautions
BU5002R/BU3002R/BU3002RH
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Safety precautions
This Instruction Manual contains information important for safe use.
Be sure to read this manual before installation and use.
● The safety symbols in this Instruction Manual and their meanings are as follows.
Warning
Indicates that improper handling may result in death or serious
injury.
Caution
Indicates that improper handling may cause injury or property
damage.
* Property damage means damage to buildings and other property, as well as livestock and pets.
: Indicates a prohibition (what you must not do). For example, means that
disassembly is prohibited.
: Indicates a compulsory action (what you must do). For example, means
that a ground connection must be made.
Warning (product applications)
Do not use this unit where high reliability and safety are required as
listed below.
* The unit has been designed and manufactured with the aim of use with
FA and OA equipment such as computers.
⚫For medical equipment or systems that directly affect human life
⚫For any purpose directly related to human safety (Example: Operation,
manipulation, or control of vehicles, etc.)
⚫For any purposes where a breakdown has possibility of causing serious social
and/or public damage (Example: Main computer systems, main communication
equipment, etc.)
⚫Any other usage with the same level of importance

Safety precautions
BU5002R/BU3002R/BU3002RH
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Warning (for installation and connection)
Do not connect to half-wave rectified devices whose current flows only
for half the cycle of the AC power supply, such as a blow dryer, some
solenoid valves, etc.
⚫There is a risk of breakdown of the unit, smoke generation, or ignition.
When replacing an input/output cable of a terminal block model, fix the
cable with a terminal block cover.
⚫If the cable connection is loosened, there is a risk of breakdown of the unit, smoke
generation, or ignition.
⚫There is a risk of an electric shock.
Do not place the unit on other devices as it is heavy.
⚫Do not place an expansion battery unit on the unit, or place the unit on an
expansion battery unit.
⚫There is a risk that an injury could be caused if it falls.
Do not connect any standalone inductive device such as a coil
(transformer, electromagnet) or motor.
⚫There is a risk of breakdown of the unit, smoke generation, or ignition.
Do not block the ventilation inlet and outlet (front and rear surfaces).
⚫If the internal temperature increases, there is a risk of breakdown of the unit,
battery degradation, smoke generation, or ignition.
⚫Install so that the distance from a wall to the front surface is 5 cm or more, and 10
cm or more to the rear surface.
When using support angles, be sure to use the ones provided with this
product.
⚫If support angles other than the accessory items are used, there is a possibility that
support angles break apart and the unit falls down, which may lead to an injury.
When installing onto a rack, be sure to use the provided support angles
to support and fix this product.
⚫Support each unit individually with support angles.
⚫When installing onto a rack, be sure to use both the support angles and ear
brackets provided with this product. The ear brackets alone cannot support this
product without the support angles.
⚫The mass of each unit is about 57 kg for the BU5002R, about 31 kg for the
BU3002R, and about 30 kg for the BU3002RH.
⚫There is a risk that an injury could be caused if the unit falls.

Safety precautions
BU5002R/BU3002R/BU3002RH
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Warning (for installation and connection)
Do not carry out any works involving the connection to the terminal
block of the unit while the input plug is connected to the commercial
power supply.
⚫There is a risk of an electric shock.
Do not allow the environment of use or storage to fall outside the
specified range.
Do not install or store in the following locations.
a. Storage in locations where the temperature is lower than -15°C / higher than
50°C, or the humidity is lower than 10% RH / higher than 90% RH
b. Use in locations where the temperature is lower than 0°C / higher than 40°C, or
the humidity is lower than 25% RH / higher than 85% RH
c. Sealed places such as a cabinet without gaps, places where a flammable gas or
corrosive gas is present, places with saline content or water droplets, places that
are extremely dusty, places with conductive dust, places that are exposed to
direct sunlight, places where vibrations or impacts may occur, outdoors, and
others
⚫There is a risk of smoke generation and ignition.
Do not cram or bend the cables forcibly.
⚫There is a risk of electric shock or fire due to damage or heating of the cable.
⚫If the cable is damaged, immediately stop using the unit, and have it repaired.
⚫For repairs, contact the shop of purchase.
Do not disassemble, repair, or modify this unit.
⚫There is a risk of causing electric shock or fire.
Provide a reliable earth connection (grounding).
⚫In the case of an AC input plug connection, connect to the commercial power
supply as it is, and in the case of a terminal block connection, provide a ground
connection to the commercial power supply. If a ground connection is not provided,
there is a possibility of electric shock in the event of a breakdown or electric
leakage.
When fixing the wiring to the terminal block, use the prescribed round
terminal, and after crimping with the prescribed amount of stripping,
tighten with the prescribed torque.
⚫There is a risk of smoke generation and ignition due to defective contact if the
prescribed round terminal or the amount of stripping are not used.
⚫There is a risk of smoke generation and ignition if a bare wire is used or a screw is
loose.

Safety precautions
BU5002R/BU3002R/BU3002RH
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Warnings (during use)
The unit is fitted with a switching circuit that enables electric power to
be supplied to the connected devices directly from the commercial
power supply, in the event that the product is stopped as a result of
breakdown of the internal control circuit function or a malfunction.
Stop the output of the unit after safely stopping the connected devices.
⚫To stop the output, either stop the commercial electrical power supply, or remove
the AC input plug.
⚫There is a possibility of electric shock if the output terminal is touched without
stopping the output.
⚫The output continues even if all the front panel displays are off.
⚫The output cannot be turned ON/OFF using the front “Power” switch.
The unit has a limited service life. Replace the unit in a planned manner,
and do not use it beyond its service life.
⚫If the product continues to be used beyond its lifespan, it may cause malfunction or
breakdown, such as failing to perform backup normally or stopping operation
suddenly. In addition, there is a risk of smoke generation and ignition, which may
result in fire.
⚫The service life of the unit is 7 years when the ambient temperature is 25°C, and 5
years when the ambient temperature is 40°C. However, the lifespan varies
depending on the ambient environment (temperature, dust), so these values are for
guidance and are not guaranteed values.
When performing maintenance on the connected device, turn the
“Power” switch of the unit off to stop the output, and stop the
commercial power supply.
⚫During operation, power output of the unit does not stop even when the commercial
power supply has stopped, so there is a possibility of electric shock.
When the black “INPUT PROTECTION” button (input overcurrent
protection switch) on the rear of the BU3002R/BU3002RH is protruding,
connected devices are too many, or a short circuit is occurring on a
connected device. Do not press the black button repeatedly or
continuously in such a situation.
⚫Press the black button after inspecting the connected devices. If the button
protrudes again, stop using the unit, and contact the shop of purchase.
⚫There is a possibility of smoke generation or ignition if the black button is pressed
repeatedly or continuously.
When using this unit, make sure to attach the output terminal block
cover. In addition, do not turn on the “Power” switch when the cover is
removed.
⚫If the “Power” switch is turned on, voltage is applied to the output terminal block,
which may cause electric shock.
⚫When replacing a cable, make sure to fix the cable with a clamp.

Safety precautions
BU5002R/BU3002R/BU3002RH
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Warning (when replacing the battery)
Only use the specified replacement batteries.
⚫If a battery other than the specified replacement battery is used, there is a risk of
breakdown of the unit, or smoke generation and ignition.
⚫Replace with the same type and same number of battery packs.
⚫Model name: Replacement battery pack for BUM5002R:
BUB5002R, 1 pack
Replacement battery pack for BUM3002R / BU3002RH:
BUB3002R, 1 pack
When replacing a battery pack, securely hold the battery pack so that it
does not fall.
⚫When the red tape on the top surface of the battery pack or the red line on the
rating label is visible, the battery pack is going to be detached with 10 cm of
movement.
⚫There is a risk that an injury could be caused if it falls.
Do not disassemble or modify the battery.
⚫There is a risk of leakage of dilute sulfuric acid, causing blindness or injury if
touched.
Do not insert metal parts into the battery connector.
Do not short-circuit the connector terminals.
⚫There is a risk of electric shock, fire, or injury.
⚫Electric energy remains inside used batteries.
Warnings (when replacing the fan)
Do not insert your hand or a metal object into the fan housing opening.
⚫There is a possibility of an electric shock or short circuit.
Do not insert your finger into the fan.
⚫The fan rotates when the AC input is connected.
⚫There is a possibility of an injury.

Safety precautions
BU5002R/BU3002R/BU3002RH
13
Caution (for installation and connection)
Transport the product paying attention to the weight and balance, and
place and use it in a stable sturdy location.
Perform the installation operation in a stable flat place.
Operations should be carried out by two or more people.
Do not transport the product mounted on the 19 inch racks or the like.
⚫The center of gravity of this product is off-center. Be careful not to drop it while
taking it out or transporting it.
⚫As the product is heavy, it should be carried by 2 or more people.
⚫You may be injured if the product is toppled or dropped.
⚫The support angles or other parts may be bent and become unusable.
⚫The mass of the unit is about 57 kg for the BU5002R, 31 kg for the BU3002R, and
about 30 kg for the BU3002RH.
⚫Be careful not to catch your finger between the installation surface and the bottom
surface of the unit.
⚫When moving, first remove the battery.
⚫If the unit is dropped, stop using it immediately, and have it inspected and repaired.
For repairs, contact the shop of purchase.
Do not lift by holding the front panel.
⚫There is a possibility that the panel comes off, leading to drop of a battery pack and
personal injury.
Place the packaging plastic bags in a location where children cannot
reach.
⚫There is a risk of suffocation if a child put a plastic bag on their head.
Be sure to connect the AC input of the unit to the commercial power
supply with the rated input voltage (200/208/220/230/240 VAC) and
frequency 50/60 Hz.
⚫If connected to a commercial power supply with a different voltage or frequency, it
could cause a fire.
⚫There is a risk of a breakdown of the unit.
If there is a fault (unusual noise or smell), disconnect the AC input from
the unit.
BU5002R: Either disconnect the AC input plug from the power outlet, or turn off
the input overcurrent protection switch “INPUT PROTECTION” on
the rear. Arrange the AC input plug in a nearby position where it can
be easily pulled out.
BU3002R: Unplug the AC input plug from the power outlet.
BU3002RH: Turn off the externally installed breaker installed on the input side.
⚫For your safety, carry out the above operations during maintenance of the
connected devices, etc.

Safety precautions
BU5002R/BU3002R/BU3002RH
14
Caution (for installation and connection)
Connect the unit to a power supply outlet (commercial power supply)
with the following current capacity.
BU5002R: 30 A or more
BU3002R/BU3002RH: 18 A or more
⚫The power supply cable may get hot.
⚫When devices are connected with the maximum output capacity, the following
maximum current flows.
BU5002R: 30A
BU3002R/BU3002RH: 18A
When you change the input cable, be sure to connect it as prescribed.
Do not carry out any works involving connection of the AC input
terminal of the unit while it is connected to a commercial power supply.
⚫Cables connected to a terminal block shall satisfy the input current specification of
the unit.
⚫There is a possibility of an electric shock or electric leakage.
Install this unit only in the specified orientation.
⚫You may be injured if the product is toppled or dropped.
⚫If installed in an orientation other than the specified orientation, it is not possible to
protect against battery leakage.
⚫When installing vertically, be sure to use the stand for vertical layout provided with
the product.
Do not use in locations where the maximum temperature exceeds 40°C.
⚫The battery may degrade rapidly and cause a fire.
⚫There is a risk of a breakdown or malfunction of the unit.
Do not connect devices that exceeds the output capacity of the unit.
The connected devices can be expanded using a power outlet strip, etc.,
but in this case do not connect devices that exceeds the current
capacity of the outlet strip.
⚫The unit will detect an overload and stop output.
⚫The wiring of the power outlet strip may generate heat and cause fire.
When installing this unit on a rack, install this unit on the lowermost
shelf of the rack.
⚫You may be injured if the product is dropped.
Remove the battery when moving the unit.
⚫If not removed, because of the heavy object, there is a risk of injury by dropping the
product, or by the sheer weight of the product.

Safety precautions
BU5002R/BU3002R/BU3002RH
15
Caution (for installation and connection)
When moving the unit, lift it by 2 or more people. Be careful not to fall
down, or drop this unit while moving.
⚫You may be injured if the product is dropped.
⚫Remove the battery before moving this unit.
Be sure to use the mounting screws provided with this product.
⚫If long screws not provided with this product are used for installation of the case,
there is a risk of internal damage.
⚫If screws not provided with this product are used, the structural strength may
become insufficient, and it may lead to an accident such as falling of this unit.
When moving after installation in a stand for vertical layout, lay it down
horizontally before moving.
⚫If it is moved upright, there is a risk of pinching fingers between the device and the
floor, causing an injury.
During installation, secure the space in front of this unit for works such
as battery replacement.
⚫You may be injured if the product is toppled or dropped.
Connect the AC input terminal of the unit while the external breaker is
turned off. Make sure to attach the input terminal block cover.
⚫There is a risk of an electric shock or electric leakage. Also, if the cable is not fixed
with the cover, the terminal connection may be loosened by the cable's weight,
which could cause a fire or smoke.
Be sure to insert the input plug into a grounded outlet.
⚫There is a risk of an electric shock.
⚫The AC input plug of the unit is wired as shown in the following figure.
BU5002R input plug (NEMA L6-30P)
(viewed from the pin direction)
BU3002R input plug (NEMA L6-20P)
(viewed from the pin direction)
E(G)
N(L2) L(L1)
E(G)
N(L2) L(L1)

Safety precautions
BU5002R/BU3002R/BU3002RH
16
Caution (for installation and connection)
For AC input terminal block models, connect the grounded phase of the
AC input power supply to the G terminal ( ) of the unit.
If either of the others are grounded apart from the grounded phase,
connect the grounded phase to the L2 terminal of the unit.
⚫If connected differently, it may cause a breakdown of the connected device.
Do not connect devices with rated voltage other than
200/208/220/230/240/100 VAC.
⚫The rated output voltage of the unit is 200/208/220/230/240/100 VAC.
⚫There is a possibility of a breakdown of the connected device due to excess
voltage.
Do not connect devices that cannot be used with the commercial power
supply.
⚫When the unit is set to “Eco mode” and a fault occurs on the device, operation is
switched to direct commercial power, and the commercial power supply is provided
to the connected device as it is.
Do not connect 4 or more expansion battery units to this unit.
⚫Up to 3 expansion battery units can be connected to the unit.
⚫There is a risk of smoke generation and ignition if 4 or more are connected.
Do not place objects onto this unit, or drop heavy objects onto it.
⚫There is a risk of not only a unit breakdown, but also personal injury in cases such
as the unit tipples over.
If the input plug is pulled out while the unit is operating, do not touch the
metal parts of the input plug under any circumstances.
⚫There is a risk of an electric shock.
⚫The leakage current of the unit on its own is equal to or less than the safety rating
(leakage current: 3.5 mA), but the leakage current may increase depending on the
connected devices, so do not touch the metal parts of the input plug.
⚫When the unit is operating, a voltage is generated on the metal parts of the input
plug through the capacitor of the internal circuit, regardless of the elapsed time.

Safety precautions
BU5002R/BU3002R/BU3002RH
17
Caution (for installation and connection)
When using in 100 V output mode, check that the output voltage is set to
100 V before turning on the power switch.
⚫When 100 V device is connected during output in 200 V mode, there is a risk of
breakdown of the device or fire.
⚫The output voltage can be set from the LCD menu by [3. Settings] - [In/Out
Settings] - [O/P Voltage].
⚫The upper limit of capacity changes in 100 V output mode.
BU5002R: 2500VA/2250W
BU3002R/BU3002RH: 1500VA/1350W
⚫In 100 V output mode, it is not possible to switch to bypass operation.
⚫In 100 V output mode, it is not possible to operate in Eco mode (commercial direct
output).
Do not wet this unit or splash water on it.
Stop using the product if it is dropped.
⚫There is a risk of electric shock or fire.
⚫If the unit gets wet or is dropped, immediately stop using it, turn the AC input off,
and have it inspected and repaired.
⚫For repairs, contact the shop of purchase.
When service life of a battery has expired, immediately replace it, or stop
using this unit.
⚫If such battery is used without replacing, there is a risk of fire or electric shock due
to liquid leakage.
Ambient
temperature
Anticipated
life
* The table on the left shows the anticipated life
under standard conditions of usage, but they
are not guaranteed values.
40°C
1.7 years
25°C
5 years
Wipe off the dust on the plug, the receptacle, and the terminal block
occasionally.
⚫It may cause a fire if the dust adheres for a long time.
⚫Stop all the connected devices and the unit and unplug the “AC input” plug from the
power outlet (commercial power supply) before wiping off the dust.
⚫Use a dry cloth to wipe the unit without using any chemicals containing thinner,
benzine, or alcohol as there is a risk of it catching fire.
Do not use this unit in a sealed location or cover it with a cover.
⚫There is a risk of abnormal heat generation and occurrence of a fire.
⚫Depending on the environment of use, hydrogen gas may be generated from the
battery, which could cause a crack or an explosion. Ventilate the area around the
unit.

Safety precautions
BU5002R/BU3002R/BU3002RH
18
Caution (during use)
If there is a strange noise or smell, if smoke is emitted, or if there is
liquid leakage from the inside of this unit, turn the “Power” switch of the
unit off to stop the output, and stop the commercial power supply.
⚫Using under such circumstances may lead to fire.
⚫If any of these situations occur, stop using this unit, and ask the shop of purchase to
carry out inspection and repair.
⚫While using this product, install an external breaker and make sure that the breaker
can be turned off immediately in the event of a fault.
Do not sit, stand, step, or lean on the top of the unit.
⚫There is a risk of a breakdown of the unit, and also an injury could be caused if the
unit topples, etc.
If the main unit input overcurrent protection switch trips, shut off the
input side, and set the input overcurrent protection switch back to “on”.
⚫The breaker may generate smoke or catch fire.
Do not hold the connector or cable when pulling the unit out.
⚫There is a risk of smoke generation and ignition.
Caution (during maintenance)
If liquid (dilute sulfuric acid) leaks from the inside, do not touch the
liquid.
⚫There is a risk of blindness or injury.
⚫If it comes in contact with the eyes or skin, immediately wash with a large quantity
of clean water, and obtain treatment from a doctor.
Do not throw the unit into a fire.
⚫It contains a lead battery, so there is a possibility of battery explosion or dilute
sulfuric acid leakage.
Do not insert any metal object in the power supply output receptacle of
the unit or the terminal block.
⚫There is a risk of an electric shock.

Safety precautions
BU5002R/BU3002R/BU3002RH
19
Caution (when replacing the battery)
Perform the replacement work in a stable flat place.
⚫Secure the battery so that it does not fall.
⚫There is a risk of injury caused by dropping the battery or burns caused by liquid
leakage (dilute sulfuric acid).
⚫Although a clack sound may be heard when inserting the battery connector, this
does not indicate any problem.
Do not replace the battery in a location where there is combustible gas.
⚫There is a risk that spark comes off when connecting the battery, causing explosion
or fire.
When there is liquid (dilute sulfuric acid) leakage from the battery, do not
touch it.
⚫There is a risk of blindness or injury.
⚫If it comes in contact with the eyes or skin, immediately wash with a large quantity
of clean water, and obtain treatment from a doctor.
Do not drop the battery or subject it to strong impact.
⚫Dilute sulfuric acid may leak.
Do not throw the battery in fire or destroy it.
⚫There is a possibility of battery explosion or dilute sulfuric acid leakage.
The battery pack is heavy. Be careful not to drop it.
⚫There is a possibility of foot injury.
Do not use a new battery and an old battery at the same time.
⚫Dilute sulfuric acid may leak.
When replacing the battery, take the following precautions.
a. Do not wear precious metal items such as watches and rings.
b. Use a screwdriver with an insulated handle.
c. Wear insulated gloves and shoes.
d. Do not place tools or metal items on the battery.
e. Turn off the power supply to the unit before inserting or removing the battery.
Note: This only applies when using as a conforming product of UL standards.
f. Do not ground the battery.
⚫There is a risk of an electric shock or a short circuit of the battery.
⚫Contact with any part of a grounded battery induces a risk of electrical shock.
⚫Battery replacement work must be carried out by a person who understands the
hazardous properties of the battery and the issues requiring care, or the work
must be carried out under their supervision.

Safety precautions
BU5002R/BU3002R/BU3002RH
20
Caution (when replacing the battery)
Do not pull out the battery pack by pulling the connector or cable.
⚫There is a risk of smoke generation and ignition.
When an expansion battery unit is connected to the unit, be sure to
replace the battery packs of this unit and the expansion battery unit at
the same time.
⚫Dilute sulfuric acid may leak.
⚫There is a risk of an electric shock or a short circuit of the battery.
When the unit is used as a conforming product of UL standards, do not
replace the battery while operating (while power is being output).
The battery replacement function does not comply with UL standards
while operating, so be sure to replace the battery after stopping
operation of the unit.
⚫To perform replacement while stopped, stop the connection function, turn off the
“Power” switch on the unit, and remove the “AC input” plug from the power outlet.
⚫When an input power error such as power outage occurs during battery
replacement while the unit is operating, the backup process is disabled and output
stops.
⚫Do not replace the battery during the backup operation. Doing so will stop the
output.
Caution (when replacing the fan)
Remove the AC input plug from the power outlet (commercial power
supply) after turning off the power supply.
⚫The fan rotates when the AC input is connected.
⚫Check that the fan has stopped.
Notes
After bringing the unit from a cold place to a warm place, leave it for several hours
before starting use.
⚫Condensation may occur if the unit is brought into a warm place suddenly, and if the unit is used in
such condition, there is a risk of breakdown.
After purchasing, charge the battery promptly.
⚫If the battery is not used for a long time after purchasing, the battery properties degrade, and in
some cases it becomes unusable.
⚫The battery can be charged once theAC input is connected to commercial power.