Huawei MTS9300A User manual

MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual
Issue 06
Date 2021-10-13
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2021. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specied in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every eort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: https://www.huawei.com
Email: [email protected]
Issue 06 (2021-10-13) Copyright © Huawei Technologies Co., Ltd. i

About This Document
Overview
This document describes the product features, components, and maintenance
methods.
Figures provided in this document are for reference only.
Intended Audience
This document is intended for:
● Sales engineers
● Technical support engineers
● Maintenance engineers
Symbol Conventions
The symbols that may be found in this document are dened as follows.
Symbol Description
Indicates a hazard with a high level of risk which, if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium level of risk which, if not
avoided, could result in death or serious injury.
Indicates a hazard with a low level of risk which, if not
avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
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Symbol Description
Supplements the important information in the main text.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue
contains all updates made in previous issues.
Issue 06 (2021-10-13)
Optimized the description of the document.
Issue 05 (2020-06-10)
Added the description of the 01074838-001 cabinet.
Issue 04 (2020-04-15)
Updated 4.3.4 Replacing a Circuit Breaker.
Issue 03 (2019-11-18)
Deleted contents about the app.
Issue 02 (2019-06-26)
Modify the DIP address of the temperature and humidity sensor.
Issue 01 (2019-05-10)
This issue is the rst ocial release.
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Contents
About This Document................................................................................................................ ii
1 Safety Precautions...................................................................................................................1
1.1 General Safety.......................................................................................................................................................................... 1
1.2 Personnel Requirements....................................................................................................................................................... 5
1.3 Electrical Safety........................................................................................................................................................................6
1.4 Installation Environment Requirements.......................................................................................................................... 7
1.5 Mechanical Safety................................................................................................................................................................... 9
1.6 Battery Safety......................................................................................................................................................................... 12
2 Product Overview.................................................................................................................. 16
2.1 Overview.................................................................................................................................................................................. 16
2.2 Cabinet Description.............................................................................................................................................................. 17
3 Components............................................................................................................................20
3.1 Power Distribution Units.................................................................................................................................................... 20
3.1.1 DCDB48-200-16B and Power Subracks..................................................................................................................... 20
3.1.2 AC and Battery Power Distribution Box.....................................................................................................................24
3.2 Monitoring Module SMU02C............................................................................................................................................ 25
3.3 User Interface Module UIM05B1..................................................................................................................................... 29
3.4 Rectier.................................................................................................................................................................................... 30
3.5 Heat Exchanger HXC300S.................................................................................................................................................. 32
3.6 Sensors......................................................................................................................................................................................33
3.6.1 Door Status Sensor........................................................................................................................................................... 33
3.6.2 Digital Temperature and Humidity Sensor............................................................................................................... 33
3.6.3 Temperature Sensor..........................................................................................................................................................35
3.7 Light...........................................................................................................................................................................................35
3.8 Lithium Battery ESM-48100B1......................................................................................................................................... 36
4 Maintenance...........................................................................................................................42
4.1 Routine Maintenance.......................................................................................................................................................... 42
4.1.1 Cabinet.................................................................................................................................................................................. 42
4.1.2 AC and DC Power Distribution..................................................................................................................................... 43
4.1.3 Rectier................................................................................................................................................................................. 44
4.1.4 Monitoring Unit................................................................................................................................................................. 45
4.1.5 Parameters on the SMU.................................................................................................................................................. 46
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4.1.6 Cables.................................................................................................................................................................................... 47
4.1.7 ESMs.......................................................................................................................................................................................48
4.2 Identifying Component Faults.......................................................................................................................................... 49
4.2.1 Identifying Rectier Faults............................................................................................................................................. 49
4.2.2 Identifying Circuit Breaker Faults.................................................................................................................................49
4.2.3 Identifying SMU Faults.................................................................................................................................................... 49
4.3 Replacing Components....................................................................................................................................................... 50
4.3.1 Replacing an SMU02C..................................................................................................................................................... 50
4.3.2 Replacing a UIM05B1.......................................................................................................................................................51
4.3.3 Replacing a Rectier......................................................................................................................................................... 52
4.3.4 Replacing a Circuit Breaker............................................................................................................................................ 53
4.3.5 Replacing Heat Exchanger Fans................................................................................................................................... 54
4.3.6 Replacing a Door Status Sensor................................................................................................................................... 57
4.3.7 Replacing an Ambient Temperature and Humidity Sensor................................................................................ 58
4.3.8 Replacing a Battery Temperature Sensor.................................................................................................................. 59
4.3.9 Replacing a Light............................................................................................................................................................... 60
4.3.10 Replacing an ESM........................................................................................................................................................... 61
A Technical Specications.......................................................................................................63
A.1 Environment Specications............................................................................................................................................... 63
A.2 Electrical Specications...................................................................................................................................................... 64
A.3 EMC Specications............................................................................................................................................................... 65
B Electrical Conceptual Diagrams.........................................................................................67
C Associations Between UIM Dry Contacts and Alarms.................................................. 68
D Acronyms and Abbreviations............................................................................................. 70
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1 Safety Precautions
1.1 General Safety
Statement
Before installing, operating, and maintaining the equipment, read this document
and observe all the safety instructions on the equipment and in this document.
The "NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this
document do not cover all the safety instructions. They are only supplements to
the safety instructions. The Company will not be liable for any consequence
caused by the violation of general safety requirements or design, production, and
usage safety standards.
Ensure that the equipment is used in environments that meet its design
specications. Otherwise, the equipment may become faulty, and the resulting
equipment malfunction, component damage, personal injuries, or property
damage are not covered under the warranty.
Follow local laws and regulations when installing, operating, or maintaining the
equipment. The safety instructions in this document are only supplements to local
laws and regulations.
The Company will not be liable for any consequences of the following
circumstances:
● Operation beyond the conditions specied in this document
● Installation or use in environments which are not specied in relevant
international or national standards
● Unauthorized modications to the product or software code or removal of the
product
● Failure to follow the operation instructions and safety precautions on the
product and in this document
● Equipment damage due to force majeure, such as earthquakes, re, and
storms
● Damage caused during transportation by the customer
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● Storage conditions that do not meet the requirements specied in this
document
General Requirements
● Before installing, operating, or maintaining the equipment, remove any
conductive objects such as watches or metal jewelry like bracelets, bangles,
and rings to avoid electric shock.
● When installing, operating, or maintaining the equipment, wear dedicated
protective gears such as insulation gloves, goggles, and safety clothing,
helmet, and shoes, as shown in the following gure.
● Use insulated tools or tools with insulated handles, as shown in the following
gure.
● Follow the specied procedures for installation, operation, and maintenance.
● Ensure that bolts are tightened with a torque wrench and marked using red or
blue color. Installation personnel mark tightened bolts in blue. Quality
inspection personnel conrm if the bolts are tightened and then mark them in
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red. (The marks should cross the edges of the bolts, as shown in the following
gure.)
● Before installing, operating, or maintaining a cabinet, clean up any water, ice,
snow, or other sundries on the top of the cabinet to prevent sundries from
falling into the cabinet when you open the cabinet door.
● Do not install, use, or operate outdoor equipment and cables (including but
not limited to moving equipment, operating equipment and cables, inserting
connectors to or removing connectors from signal ports connected to outdoor
facilities, working at heights, and performing outdoor installation) in harsh
weather conditions such as lightning, rain, snow, and level 6 or stronger wind.
● Before handling a conductor surface or terminal, measure the contact point
voltage and ensure that there is no risk of electric shock.
● Ensure that all slots are installed with boards or ller panels. Avoid hazards
caused by hazardous voltages or energy on boards. Ensure that the air
channel is normal, control electromagnetic interference, and prevent dust and
other sundries on the backplane, baseplate, and boards.
● After installing the equipment, remove idle packing materials such as cartons,
foam, plastics, and cable ties from the equipment area.
● In the case of a re, immediately leave the building or the equipment area,
and turn on the re alarm bell or make an emergency call. Do not enter the
building on re in any case.
● Do not stop using protective devices. Pay attention to the warnings, cautions,
and related precautionary measures in this document and on the equipment.
Promptly replace warning labels that have worn out.
● Keep irrelevant people away from the equipment. Only operators are allowed
to access the equipment.
● All cable holes should be sealed. Seal the used cable holes with restop putty.
Seal the unused cable holes with the caps delivered with the cabinet. The
following gure shows the criteria for correct sealing with restop putty.
● Do not use solvents such as water, alcohol, or oil to clean electrical
components inside or outside of a cabinet.
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Personal Safety
● If there is a probability of personal injury or equipment damage during
operations on the equipment, immediately stop the operations, report the
case to the supervisor, and take feasible protective measures.
● To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits
to telecommunication network voltage (TNV) circuits.
● Do not power on the equipment before it is installed or conrmed by
professionals.
Symbol Conventions
To ensure personal and equipment safety, observe all the safety instructions
marked on the equipment when installing, operating, and maintaining the
equipment.
Symbol Description
Indicates a part exposed to high voltage. This symbol
warns operators that both direct and indirect contact with
the power grid is fatal. This symbol is attached to a
position with dangerous voltages or a power protective
cover which may be removed during maintenance.
Warns users of overheating. This symbol is attached to a
device surface that may overheat and cause scalding. It
warns users not to touch the surface during operations or
maintenance. Users should wear heat insulation gloves
before operations to prevent scalding.
or
Indicates protection earthing. This symbol is attached next
to a protection ground terminal next to grounded
equipment and an external ground system. An equipment
ground cable is connected to an external ground bar
through the protection ground terminal.
Indicates equipotential bonding. This symbol is found with
equipotential terminals inside equipment.
Indicates electrostatic discharge (ESD). This symbol is used
in all electrostatic sensitive areas. Before operating
equipment in these areas, wear ESD gloves or an ESD
wrist strap.
or
Capacitors store hazardous energy. Open the chassis one
minute after all power supplies are disconnected.
Indicates that the equipment is safe to use at altitudes
below 2000 m.
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Symbol Description
Indicates that the equipment is not safe to use in tropical
climates.
or
Indicates a fan assembly or moving part. This symbol is
silkscreened on or attached to the panel of a fan assembly,
warning operators to keep away. Do not touch the blades
when the fan is rotating.
or
or
This symbol is used when the usage of a device port
cannot be clearly described. It prompts users to refer to
the instruction. This symbol can be used in but not limited
to the following scenarios:
1. For a multi-power device, use it near the power supply
to replace the multi-power supply identier. The
symbol indicates that the device has multiple power
inputs. Therefore, when powering o the device, you
must disconnect all power inputs.
2. If there are multiple output interfaces, use the symbol
near the output interfaces. Connect cables according to
the rated power output and conguration parameter
information in the instruction.
3. If there are multiple slots, use the symbol near the slot
information. For details, see the description of slot
information, restrictions on boards, and usage
conditions in the instruction.
1.2 Personnel Requirements
● Personnel who plan to install or maintain the equipment must receive
thorough training, understand all necessary safety precautions, and be able to
correctly perform all operations.
● Only qualied professionals or trained personnel are allowed to install,
operate, and maintain the equipment.
● Only qualied professionals are allowed to remove safety facilities and inspect
the equipment.
● Personnel who will operate the equipment, including operators, trained
personnel, and professionals, should possess the local national required
qualications in special operations such as high-voltage operations, working
at heights, and operations of special equipment.
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NO TE
● Professionals: personnel who are trained or experienced in equipment operations and
are clear of the sources and degree of various potential hazards in equipment
installation, operation, maintenance
● Trained personnel: personnel who are technically trained, have required experience, are
aware of possible hazards on themselves in certain operations, and are able to take
protective measures to minimize the hazards on themselves and other people
● Operators: operation personnel who may come in contact with the equipment, except
trained personnel and professionals
1.3 Electrical Safety
Grounding
● The protective ground of the equipment should be reliably connected to the
ground screw on the metal enclosure (grounding resistance ≤ 0.1 ohm).
● For the equipment that needs to be grounded, install the ground cable rst
when installing the equipment and remove the ground cable last when
removing the equipment.
● Do not damage the ground conductor.
● Do not operate the equipment in the absence of a properly installed ground
conductor.
● For the equipment that uses a three-pin socket, ensure that the ground
terminal in the socket is connected to the protection ground.
AC and DC Power
D ANGER
● The power system is energized by power sources with hazardous voltage. Direct
or indirect contact (through damp objects) with the power sources may result
in electric shock.
● Non-standard and improper operations may result in re or electric shock.
● Do not connect or disconnect power cables with power on. Transient contact
between the core of the power cable and the conductor will generate electric
arcs or sparks, which may cause re or personal injury.
● If the power supply to the equipment is permanently connected, install an
easily accessible disconnector at the exterior of the device.
● Before making electrical connections, switch o the disconnector on the
upstream device to cut o the power supply if people may contact energized
components.
● If a "high electricity leakage" tag is attached on the equipment, ground the
protective ground terminal on the equipment enclosure before connecting the
AC power supply; otherwise, electric shock as a result of electricity leakage
may occur.
● Before installing or removing a power cable, turn o the power switch.
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● Before connecting a power cable, check that the label on the power cable is
correct.
● Before connecting the power supply, ensure that cable connections are
correct.
● If the equipment has multiple inputs, disconnect all the inputs before
operating the equipment.
Cabling
● When routing cables, ensure that a distance of at least 30 mm exists between
the cables and heat-generating components or areas. This prevents damage
to the insulation layer of the cables.
● Do not route cables behind the air intake and exhaust vents of the
equipment.
● Ensure that cables meet the VW-1 ame spread rating requirements.
● Bind cables of the same type together. When routing cables of dierent types,
ensure that they are at least 30 mm away from each other.
● Ensure that all cables are securely bound. Route and bind cables so that they
appear neat and tidy and their cable sheaths are intact.
● If an AC input power cable is connected to the cabinet from the top, bend the
cable in a U shape outside the cabinet and then route it into the cabinet.
● Ensure that the bending radius of each cable is at least ve times the
diameter of the cable.
● When routing power cables, ensure that there is no coiling or twisting. Do not
join or weld power cables. If necessary, use a longer cable.
ESD
● When installing, operating, and maintaining the equipment, comply with the
ESD protection regulations and wear the ESD clothing, gloves, and wrist strap.
● When holding a board, hold its edge without touching any components. Do
not touch the components with your bare hands.
● Package boards with ESD packaging materials before storing or transporting
them.
1.4 Installation Environment Requirements
● To prevent re due to high temperature, ensure that the ventilation vents or
heat dissipation system are not blocked when the equipment is running.
● Ensure that there are no acid, alkaline, or other corrosive gases in the
installation place.
● Do not place the equipment near heat sources or exposed re sources, such
as electric heaters, microwave ovens, roasters, water heaters, furnace re,
candles, or other places where high temperature may occur. Otherwise, the
enclosure will melt or the equipment will heat up, which can cause a re.
● Install the equipment in an area far away from liquids. Do not install it under
areas prone to condensation, such as under water pipes and air exhaust vents,
or areas prone to water leakage, such as air conditioner vents, ventilation
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vents, or feeder windows of the equipment room. Ensure that no liquid enters
the equipment to prevent faults or short circuits.
● Before installing the equipment into a cabinet, ensure that the cabinet is
secured and will not tilt or fall down due to loss of balance, which can cause
personal injury or equipment damage.
● Do not expose the equipment to ammable or explosive gas or smoke. Do
not perform any operation on the equipment in such environments.
Installation at Heights
Working at heights refers to operations that are performed at least 2 meters
above the ground.
Do not at heights in any of the following situations:
● Rainwater remains on steel pipes or other risky conditions exist. After the
preceding conditions no longer exist, the safety director and relevant technical
personnel need to check the involved equipment. Operators can begin
working only after obtaining consent.
● When working at heights, comply with local relevant laws and regulations.
● Only trained and qualied personnel are allowed to work at heights.
● Before working at heights, check the climbing tools and safety gears such as
safety helmets, safety belts, ladders, springboards, scaolding, and lifting
equipment. If they do not meet the requirements, take corrective measures or
disallow working at heights.
● Wear personal protective equipment such as the safety helmet and safety belt
or waist rope and fasten it to a solid structure. Do not mount it on an
insecure moveable object or metal object with sharp edges. Make sure that
the hooks will not slide o.
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D ANGER
● Set a restricted area and eye-catching signs for working at heights to warn
away irrelevant personnel.
● Carry the operation machinery and tools properly to prevent them from falling
o and causing injuries.
● Personnel involving working at heights are not allowed to throw objects from
the height to the ground, or vice versa. Objects should be transported by tough
slings, hanging baskets, highline trolleys, or cranes.
● Do not perform operations on the upper and lower layers at the same time. If
unavoidable, install a dedicated protective shelter between the upper and lower
layers or take other protective measures. Do not pile up tools or materials on
the upper layer.
● Ensure that guard rails and warning signs are set at the edges and openings of
the area involving working at heights to prevent falls.
● Do not pile up scaolding, springboards, or other sundries on the ground under
the area involving working at heights. Do not allow people to stay or pass
under the area involving working at heights.
● Inspect the scaolding, springboards, and workbenches used for working at
heights in advance to ensure that their structures are solid and not overloaded.
● Dismantle the scaolding from top down after nishing the job. Do not
dismantle the upper and lower layers at the same time. When removing a part,
ensure that other parts will not collapse.
● Do not loiter when working at heights. Do not sleep at heights.
● Any violations must be promptly pointed out by the site manager or safety
supervisor and the involved personnel should be prompted for correction.
Personnel who fail to stop violations will be forbidden from working.
● Operators who violate the safety regulations are responsible for accidents
caused. The supervisor has to bear the responsibility accordingly.
1.5 Mechanical Safety
Hoisting Devices
D ANGER
Do not walk under hoisted objects.
● Only trained and qualied personnel are allowed to perform hoisting
operations.
● Check that hoisting tools are available and in good condition.
● Before hoisting objects, ensure that hoisting tools are rmly secured onto a
load-bearing object or wall.
● Ensure that the angle formed by two hoisting cables is no more than 90
degrees, as shown in the following gure.
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● Do not drag steel ropes and hoisting tools or bump hoisted objects against
hard objects during hoisting.
Using Ladders
● Use wooden or berglass ladders when you need to perform live working at
heights.
● When a step ladder is used, ensure that the pull ropes are secured and the
ladder is held rm.
● Before using a ladder, check that it is intact and conrm its load bearing
capacity. Do not overload it.
● Ensure that the wider end of the ladder is at the bottom, or protective
measures have been taken at the bottom to prevent the ladder from sliding.
● Ensure that the ladder is securely positioned. The recommended angle for a
ladder against the oor is 75 degrees, as shown in the following gure. An
angle ruler can be used to measure the angle.
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When climbing a ladder, take the following precautions to reduce risks and ensure
safety:
● Keep your body steady.
● Do not climb higher than the fourth rung of the ladder from the top.
● To climb onto a roof, ensure that the ladder top is at least one meter higher
than the roof line, as shown in the following gure.
● Ensure that your body's center of gravity does not shift outside the legs of the
ladder.
Drilling Holes
When drilling holes into a wall or oor, observe the following safety precautions:
NO TICE
Do not drill holes into the equipment. Doing so may aect the electromagnetic
shielding of the equipment and damage components or cables inside. Metal
shavings from drilling may short-circuit boards inside the equipment.
● Wear goggles and protective gloves when drilling holes.
● When drilling holes, protect the equipment from shavings. After drilling, clean
up any shavings that have accumulated inside or outside the equipment.
Moving Heavy Objects
● Be cautious to avoid injury when moving heavy objects.
● When moving the equipment by hand, wear protective gloves to prevent
injuries.
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● Move or lift the equipment by holding its handles or lower edges. Do not hold
the handles of modules (such as power supply units, fans, and boards) that
are installed in the equipment because they cannot support the weight of the
equipment.
1.6 Battery Safety
If no battery is involved, skip this section.
Before installing, operating, or maintaining batteries, read the battery
manufacturer's instructions. Observe the safety precautions provided in this
document which are supplemental to the safety instructions provided by the
battery manufacturer.
Basic Requirements
Before operating batteries, carefully read the safety precautions for battery
handling and master the correct battery connection methods.
D ANGER
● Do not expose batteries at high temperatures or around heat-generating
sources, such as sunlight, re sources, transformers, and heaters. Overheating
may cause battery explosion.
● Do not burn batteries. Otherwise, the batteries may explode.
● To avoid leakage, overheating, re, or explosions, do not disassemble, alter, or
damage batteries, for example, insert sundries into batteries or immerse
batteries in water or other liquids.
● When replacing a battery, use a battery of the same model or type. Improper
replacement may cause the battery to explode.
● Do not connect a metal conductor to the battery poles or touch the battery
terminals. Otherwise, the battery may be short-circuited and heat up, which
can cause injuries such as burning.
To ensure safety during battery installation, operation, and maintenance, pay
attention to the following:
● Do not wear conductive articles such as watches, bracelets, bangles, and rings.
● Wear goggles, rubber gloves, and protective clothing to avoid damage caused
by electrolyte in the case of electrolyte overow. If a battery overows,
protect the skin or eyes from the leaking liquid. If the skin or eyes come in
contact with the leaking liquid, wash it immediately with clean water and go
to the hospital for medical treatment.
● Use dedicated insulated tools.
● Move batteries in the required direction. Do not place a battery upside down
or tilt it.
● Keep the battery loop disconnected during installation and maintenance.
● Do not drop, squeeze, or puncture a battery. Protect batteries from external
high pressure to prevent internal short circuits and overheating.
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● Dispose of waste batteries in accordance with local laws and regulations. Do
not dispose of batteries as household waste. If a battery is disposed of
improperly, it may explode.
● Do not use a damaged battery.
● To prevent injuries or explosion, do not allow children or pets to swallow or
bite a battery.
● If batteries experience discoloration, deformation, abnormal heating, or other
abnormalities during working, charging, or storage, stop using the batteries
and replace them with new ones.
● Batteries can work properly with the allowed charge and discharge
parameters when the temperature is within the specied range. If the
temperature is outside the specied range, the battery charge and discharge
performance and safety are aected.
Battery Installation
Before installing batteries, observe the following safety precautions:
● Install batteries in a dry and cool environment with good ventilation, which is
away from high temperature and ammable materials, and take precautions
against re.
● Place and secure batteries horizontally.
● Note the polarities when installing batteries. Do not short-circuit the positive
and negative poles of the same battery or battery string. Otherwise, the
battery may be short-circuited.
● When installing a battery string, retain at least one breakpoint to prevent a
loop being formed. After checking that the installation is correct, close the
breakpoints to nish the installation.
● During the installation, insulate the terminals of cables connecting batteries.
Ensure that the terminals do not come into contact with metal components
such as the cabinet.
● Secure battery cables or copper bars by tightening bolts to the required
torque. Loose connections will result in excessive voltage drop or cause
batteries to burn out in the case of excessive current.
● Check battery connections periodically, ensuring that all screws are securely
tightened.
Battery Short Circuit
D ANGER
Battery short circuits can generate high instantaneous current and release a great
amount of energy, which may cause equipment damage or personal injury.
● If permitted, disconnect the batteries in use before performing any other
operations on them.
● To avoid battery short circuit, do not maintain batteries with power on.
MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual 1 Safety Precautions
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Flammable Gas
NO TICE
● Do not use unsealed lead-acid batteries.
● To prevent re or corrosion, ensure that ammable gas (such as hydrogen) is
properly exhausted for lead-acid batteries.
Lead-acid batteries emit ammable gas when used. Ensure that batteries are kept
in a well-ventilated area and take preventive measures against re.
Battery Leakage
NO TICE
Battery overheating causes deformation, damage, and electrolyte overow.
If the battery temperature is higher than 60°C, check the battery for electrolyte
overow. If the electrolyte overows, handle the leakage immediately.
Electrolyte overow may damage the equipment. It will corrode metal parts and
boards, and ultimately damage the boards.
WARNING
When the electrolyte overows, absorb and neutralize the electrolyte immediately.
When moving or handling a battery whose electrolyte leaks, note that the leaking
electrolyte may cause damage.
If the electrolyte overows, follow the instructions of the battery manufacturer or
neutralize the electrolyte by using sodium bicarbonate (NaHCO3) or sodium
carbonate (Na2CO3).
Lithium Battery
The safety precautions for lithium batteries are similar to those for lead-acid
batteries except that you also need to observe the following precautions.
WARNING
There is a risk of explosion if the model of the replaced battery is incorrect.
● A battery can be replaced only with a battery of the same or similar model
recommended by the manufacturer.
● When handling a lithium battery, do not place it upside down, tilt it, or bump
it with other objects.
MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual 1 Safety Precautions
Issue 06 (2021-10-13) Copyright © Huawei Technologies Co., Ltd. 14