Huawei Technologies RRU32682G6 Remote Radio Unit User Manual
Huawei Technologies Co.,Ltd Remote Radio Unit
Contents
- 1. Installation Guide
- 2. Safety information
Safety information
Safety Information
Contents
1 Safety Information .......................................................................................................................... 2
1.1 General Safety Precautions .............................................................................................................................. 2
1.2 Installation Environment .................................................................................................................................. 5
1.2.1 Indoor Installation ................................................................................................................................... 6
1.2.2 Outdoor Installation ................................................................................................................................ 7
1.3 Electrical Safety ............................................................................................................................................... 8
1.4 Battery Safety ................................................................................................................................................... 9
1.4.1 Basic Requirements............................................................................................................................... 10
1.4.2 Requirements for Rechargeable Batteries ............................................................................................. 10
1.4.3 Requirements for Non-Rechargeable Batteries ..................................................................................... 11
1.5 Radiation Safety ............................................................................................................................................. 12
1.5.1 Electromagnetic Field Exposure ........................................................................................................... 12
1.5.2 Laser Radiation ..................................................................................................................................... 13
1.6 Mechanical Safety .......................................................................................................................................... 14
1.7 Maintenance Safety ........................................................................................................................................ 17
1.8 Safety Signs .................................................................................................................................................... 18
Safety Information
1 Safety Information
1.1 General Safety Precautions
Read all safety information before installing, operating, and maintaining Huawei
equipment.
To minimize risk of personal injury and equipment damage, always follow all safety
precautions marked on equipment and described in manuals.
The Caution, Warning and Danger sections in the manual are only a supplement and
do not represent all safety instructions.
Use the equipment only where all design specifications are met. Otherwise, any resulting
equipment failure and its negative consequences to equipment, parts, personnel, and
property will not be covered by the warranty.
Definitions
Skilled personnel:
Possesses experience or has been trained in the technology and methodology used in the
equipment. Such personnel must know about the sources and magnitude of safety risks
involved.
Trained personnel:
Has been taught or supervised by skilled personnel and can identify the sources of safety
risks involved and take precautions to avoid unintentional exposure. Such personnel
should avoid risky areas under all operating conditions, be aware of operational risks,
and minimize these risks.
User or operator:
All other personnel, including those with access to the equipment or who may be in the
vicinity of the equipment.
Symbol Conventions
prompts users to be careful. Such sections provide helpful
suggestions or links to external references.
prompts users to be careful. In such situations, certain user actions
may result in equipment damage or loss of data.
Safety Information
indicates critical safety instructions. Users are at risk of bodily injury
and must be familiar with standard accident prevention before performing any operation
on the equipment, especially actions involving electric circuits.
indicates a part exposed to high voltage. This symbol warns operators that both
direct and indirect contact with the power grid is fatal. Such areas include hazardous
voltage points or protective power supply covers that may be removed during
maintenance.
indicates overheating. This symbol is found on hot equipment surfaces that can
cause burns. Do not touch the equipment during operation or maintenance, and wear heat
insulation gloves when working in the area.
indicates that microwave emission. The symbol is attached near the output
socket of the transmitter power amplifier or antenna socket of the transmitter combiner
to indicate RF radiation. Do not tamper with the transmitter output feeder or antenna
feeder connector when the transmitter is on. Turn off the transmitter before
disconnecting the feeder connector or working near the transmit antenna.
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. This symbol is used in all electrostatic sensitive
areas. Before operating equipment in these areas, wear ESD gloves or an ESD wrist strap.
indicates that the equipment is safe to use in altitudes below 2000 m (6561.6 ft.).
indicates that the equipment is not safe to use in tropical climates.
prompts operators not to touch the blades when the fan is rotating. It is
silkscreened on or attached to a fan box panel.
or prompts users to read the instruction manual. This symbol is used
for additional instructions that are absent on the parts label. Such scenarios include but
are not limited to:
− For equipment with multiple power supplies, this symbol replaces the multi-power
symbol next to the power supplies. It reminds users that the equipment has multiple
power supplies that must all be disconnected when powering off the equipment.
Safety Information
− For equipment with multiple output ports, this symbol is found at the output ports.
Read the manual before connection for the rating and configuration information.
− For equipment with multiple slots, this symbol reminds the user to read the manual
for slot information, board restrictions, and usage conditions.
Basic Precautions
Trained personnel must be certified, understand all required safety regulations, and
master correct operational methods before installing, operating and maintaining Huawei
equipment.
All work with equipment must comply with local laws and regulations. Safety
information in the manual only serves as a supplement. In addition:
- Only skilled and trained personnel can install, operate, and maintain equipment.
- Only skilled and trained personnel can remove safety infrastructure and maintenance
equipment.
- Operators must report faults or errors that may cause safety issues promptly.
- All personnel working with equipment should have high-voltage operation, climbing,
special equipment operation, and other operational qualifications required by the
local country.
If personal injury or equipment damage occurs during installation, stop operations
immediately, report the situation to the project owner, and take effective protective
measures.
All work on outdoor equipment is strictly forbidden in lightning, rain, snow, wind and
other adverse weather conditions. Such work includes but is not limited to outdoor
equipment transportation, cabinet installation, power cable installation, and outdoor
cable connection.
Do not wear watches, jewelry, or other conductive objects when working with equipment.
Dedicated insulation safety tools such as gloves, clothing, helmet, and shoes must be
worn at all times, as shown in Figure 1-1.
Safety Information
Figure 1-1 Safety personal protective equipment (PPE)
Always follow the procedures in the Hardware Installation and Maintenance Guide,
Configuration Guide, and Operation and Maintenance Guide while working.
Use a voltmeter to measure the voltage at the contact point before touching any metal
surface or terminal to prevent electric shocks.
Ensure that all slots are filled with boards or filler panels. Avoid exposure to board
hazardous voltage and heat by ensuring that ventilation channels are working normally,
that electromagnetic interference is controlled, and that the backplane, motherboard, and
boards are free from dust or foreign matter.
After equipment installation, conduct routine checks and maintenance. Promptly replace
faulty parts as required by the Hardware Installation and Maintenance Guide and
Operation and Maintenance Guide.
After equipment installation, clear the area of packaging materials such as the box,
styrofoam, plastic, and cable ties.
In case of fire, evacuate from the building or equipment area and activate the fire alarm
or call the fire emergency number. Do not reenter the burning building under any
circumstances.
The device must be fixed securely on the floor or other reliable objects, such as the walls
and the mounting racks before operation.
The equipment operating temperature range between -40℃ to 55℃.
The equipment operating voltage range between -36Vdc to -57Vdc.
1.2 Installation Environment
Ensure that the installation environment complies with equipment specifications,
including voltage, temperature, humidity, altitude, degree of pollution, overvoltage
category, and waterproofing and dustproofing classification.
Safety Information
Avoid flammable, explosive gas or smog environments.
Keep the installation site free of acidic, alkaline or other corrosive gases.
Keep the equipment away from sources of heat or fire, such as the electric heater,
microwave oven, oven, water heater, fireplace, candle or other heat generators. Heat may
cause the equipment to catch fire or its housing to melt.
Do not obscure or cover running equipment with flammable materials such as paper or
fabric. This hampers heat dissipation and can cause the equipment to catch fire or its
housing to melt.
Install and use the equipment and its system in a location with restricted access location.
Do not block air vents when the equipment is running. Maintain air vents away from the
wall or other objects as required in the Hardware Installation and Maintenance Guide.
The minimum distance is 5 cm (1.97 in.) unless specified.
Do not use equipment that does not meet IP54 waterproof and dustproof standards in
outdoor environments.
1.2.1 Indoor Installation
Ensure that there is no water leakage or condensation from air conditioning failure in the
equipment room on the top of the equipment. Introducing water into the equipment will
cause it to fail.
Install fixed equipment with a large hole at the bottom on concrete, tile or other non-
combustible surfaces.
Prevent rodent and pest infestations at the installation site.
Wall Installation
Before drilling holes on the wall, ensure that there is no circuitry, water pipe, or gas
pipeline in the wall area to be drilled to avoid bodily injury.
Do not place any flammable or explosive objects above or under the equipment, and do
not obstruct the equipment with foreign objects within a 1-meter (3.28 ft.) radius.
Ensure that no hole are drilled that face upwards to prevent water ingress and equipment
damage.
Ensure that screws are securely installed. Otherwise, the equipment may fall due to
tension after cable connection, causing equipment damage or even bodily injury.
Desktop Installation
Ensure that the desk or workbench is in stable contact with the ground.
Do not put other items on the equipment.
Do not place cups with liquid on or next to the equipment. Spillage may enter the
equipment and pose safety risks. If this happens, immediately stop the equipment, cut off
the power supply, disconnect all cables, and contact after-sales personnel.
Cabinet Installation
Before installing equipment in a cabinet, ensure that the cabinet is securely fastened with
a balanced center of gravity. Otherwise, tipping or falling cabinets may cause bodily
injury and equipment damage.
Leave proper clearance around the equipment.
Make sure an enclosed cabinet is adequately ventilated.
Safety Information
1.2.2 Outdoor Installation
Outdoor Installation Requirements
Do not work on outdoor equipment and cables in lightning, rainy, snowy, windy (wind
force > 6) and other adverse weather conditions.
Ensure that the enclosure is class IP54 or higher.
Comply with all related local regulations.
Set up signs at the site to indicate a dangerous restricted area inaccessible to
unauthorized personnel.
The scaffolding, platforms, and workbench must pass safety checks to ensure structural
integrity. Do not overload the scaffolding.
Avoid simultaneous work at heights and on the ground. If such situations cannot be
avoided, erect a special protective shed or other protective measures between the height
and ground, and clear piles of tools and property from the area.
Do not loiter in the work area.
Any violations must be promptly pointed out by the site manager or safety supervisor
and prompted for correction. If the problem persists, the personnel involved risks
suspension that is regarded as absenteeism.
Operators are responsible for accidents resulting from violation of safety regulations or failure
to make timely correction. Supervisors also bear responsibility.
Installation at Heights
Work performed 2 m (6.56 ft.) above the ground is regarded as work at heights.
Work at heights, comply with related local regulations.
Only skilled and trained personnel are allowed to work at heights.
Stop such work in any of the following conditions: adverse weather, wet steel tubes, and
other risky situations. Resume work only after a Huawei safety director and related
technical personnel have checked all the equipment.
The ladder used in work at heights must be intact and skid-resistant to ensure safe
climbing. The recommended angle between the ladder and the ground is 75°. When
using a step ladder, the rope must be strong and the ladder must be supported.
Place guardrails and warning signs around protrusions and holes to avoid accidents.
Safety Information
Before proceeding, carefully check climbing and safety tools, such as the safety helmet,
safety belt, ladder, springboard, scaffolding, and hoisting equipment. If any tool does not
meet requirements, fix or replace it immediately, or postpone the work.
Wear proper safety PPE and a helmet as well as a belt or waist rope secured to a robust
support. Do not tie the belt or waist rope to an unstable object or metal with sharp edges. A
fastener that detaches may cause a falling accident.
Avoid dropping machinery and tools that may cause injury.
Transport all objects from or to the ground level by a strong rope, basket, elevated vehicle,
or crane instead of throwing them.
Do not pile up scaffolding, materials, and other debris on the ground under the work area
at heights that cause traffic obstructions.
After completion, disassemble the scaffolding layer by layer from top to bottom. Do not
disassemble top and bottom layers at the same time. When disassembling a part, prevent
the collapse of other parts.
1.3 Electrical Safety
Grounding
Ensure that the protection ground is reliably grounded in accordance with local building
distribution specifications.
For equipment requiring grounding, always connect the protection ground first and
disconnect it last when installing the equipment.
For the equipment using a socket with an earthing terminal, ensure that the earthing
terminal is correctly grounded.
The device must be connected permanently to the protection ground before an operation.
The cross-sectional area of the protective ground conductor must be at least 1mm2.
AC/DC Operation
Do not contact the power system supply directly or indirectly through damp material. The
hazardous voltage may cause electric shock.
Improper operation may cause accidents such as fire and electric shock.
This device relies on the building's installed overcurrent protection from short circuits.
Ensure that a fuse or circuit breaker no larger than 80 V, 30 A is used on the phase
conductors that include all current-carrying conductors. Check that all specifications are
compatible before equipment installation.
If the power input of the equipment is permanent, ensure that an easy-to access
disconnection device is installed on the exterior of the equipment.
Safety Information
Use AC-supplied models for TN, TT power systems.
For DC-supplied models, use reinforced insulation or double insulation to isolate the DC
source from the AC mains supply.
Before connecting equipment, disconnect the corresponding external-equipment circuit
breaker.
Before connecting the load (electrical equipment) or battery cable, verify that the input
voltage is within the rated voltage range of the equipment.
Before connecting the load (electrical equipment) or battery cable, check the cable and
terminal polarities to avoid reverse connection.
Before powering on, verify that equipment electrical connections are correct.
If the device has more than one power supply, disconnect all of them when powering off
the device.
Cabling Requirements
Only cut the insulation layer at the wiring part when preparing the power cable at the site.
Doing so prevents accidents and fire from short circuit.
High-temperature environments may cause wear and tear on the insulation layer. Leave
sufficient clearance between the cable and power busbar, current shunt, fuse, heat sink
and other heating devices.
Bind the signal cable and the strong current or high-voltage cable separately.
Cables provided by the customer must comply with local cable regulations.
Do not route any cable through the air exhaust vent in the cabinet.
If cables have been stored in an ambient temperature below 0 °C (32 °F), move the
cables to a room-temperature environment at least 24 hours before installation
TNV Circuits
To avoid electric shocks, do not connect the safety extra-low voltage (SELV) circuit to
the telecommunication network voltage (TNV) circuit.
Do not tamper the cable connected to the outdoor signal port in adverse weather
conditions.
To reduce the risk of fire, use only a No. 26 AWG or larger telecommunication line cord.
ESD Requirements
To avoid component damage caused by electrostatic buildup, wear ESD gloves or an
ESD wrist strap and properly ground the other end of the ESD wrist strap before
touching a circuit board.
Hold the board by its component-free edge and do not touch chips with your hands.
Place removed boards in ESD packaging for storage or transportation.
1.4 Battery Safety
The safety information in this document is a reminder and for reference only. Read the
detailed safety information in the manufacturer instructions before battery installation,
operation, and maintenance.
Safety Information
Before installing batteries, ensure that you understand the safety requirements and correct
connection procedures.
1.4.1 Basic Requirements
Do not expose batteries to high temperatures or heat sources such as sunlight, heaters,
microwave ovens, ovens and water heaters. Overheating batteries may explode.
Do not disassemble or refit batteries, insert foreign objects, or submerge into water or
other liquid. Leakage, overheating, fire, or explosion may occur.
Wear goggles, rubber gloves, and protective clothing during installation and maintenance
to avoid injury caused by electrolyte spillage. Avoid contact with eyes and skin in case of
battery leakage. Rinse any accidentally exposed area with water and seek immediate
medical treatment.
Transport batteries in their specified positions. Do not tilt or turn them upside down.
Disconnect the circuit before battery installation and maintenance.
Use the same or equivalent type of battery to replace faulty ones. Incorrectly replaced
batteries may explode.
Do not connect metallic conductors to battery terminals or contact battery endpoints.
Battery short circuit or overheating may occur and cause injury.
Follow local regulations for battery disposal. Do not dispose of batteries as domestic
waste. Incorrectly disposed batteries may explode.
Do not drop, squeeze or puncture batteries. Avoid strong external pressure that may
cause internal short circuit and overheating.
Do not use damaged batteries.
Keep children and pets away from batteries to avoid injury or battery explosion.
1.4.2 Requirements for Rechargeable Batteries
If discoloration, deformation, overheating, or any other abnormality occurs, replace the
batteries before continuing with usage, charging or storage.
Tighten battery cables or copper bars using the torque specified in the battery
documentation. Insecure connection of battery bolts may cause excessive voltage drop or
even overcurrent leading to battery overheating.
Short Circuit Protection
Battery short circuit will produce a strong spike in current and release a large amount of heat
energy that may cause bodily injury and property damage.
Disconnect running batteries before other operations whenever possible.
Safety Information
Flammable Gas Protection
Do not use unsealed lead-acid batteries.
Lead-acid batteries should be positioned and secured horizontally for normal hydrogen
discharge to avoid combustion or equipment corrosion.
Improper usage of lead-acid batteries will cause the release of flammable gas. Ensure that
batteries are kept in a well-ventilated area and take preventive measures against fire.
Leakage Protection
Battery overheating causes deformation, damage, and electrolyte spillage.
If the battery temperature exceeds 60 °C (140 °F), check for and promptly handle any
leakage.
Use a neutralizing liquid to absorb any electrolyte spillage. Exercise caution when handling
the leaking battery because the electrolyte can cause injury.
When removing or moving the battery with spilled electrolyte, be careful with the
electrolyte that can bring potential injury. If any electrolyte spills, use NaHCO3 or
Na2CO3 to neutralize and absorb it.
Battery Discharge Protection
After batteries are installed, ensure that the fuse or circuit breaker is disconnected before
powering on the system. This avoids battery damage caused by power discharge in case of
long-term power-off.
1.4.3 Requirements for Non-Rechargeable Batteries
If discoloration, deformation, overheating, or any other abnormality occurs, replace the
batteries before continuing with usage, charging or storage.
Do not attempt to replace non-removable, built-in batteries. Doing so may damage the
batteries or the equipment. Batteries must be replaced by an authorized service center.
Do not throw batteries into fire.
Safety Information
1.5 Radiation Safety
1.5.1 Electromagnetic Field Exposure
Strong electromagnetic signals harm human health.
Equipment like radio transmitter or associated products must be handled with
consideration of exposure to radio electromagnetic fields (electromagnetic radiation).
Working with high-voltage equipment or facilities risks exposure to high-frequency
electromagnetic fields.
Radio service carriers and other users must comply with local laws and regulations when
deploying wireless base station transceivers, or other equipment or facilities.
Re-evaluate the risk of electromagnetic field exposure prior to equipment structure or
antenna modification.
Re-evaluate the risk of electromagnetic field exposure prior to modification of radio
frequency (RF) output specifications or parameters.
Re-evaluate the risk of electromagnetic field exposure prior to modification of the site
environment where equipment or facilities are located.
In order to avoid the possibility of exceeding the Europe radio frequency exposure limits,
human proximity to the equipment shall not be less than 10.76 m
This equipment complies with FCC/IC radiation exposure limits set forth for an
uncontrolled environment.This equipment should be installed and operated with
minimum distance 7.09m between the radiator and your body.
Restricted Areas
An area with excessive electromagnetic field exposure is considered hazardous and must be at
a specified distance away from the equipment or facility as stipulated by related exposure
control limits. This distance controls exposure to the electromagnetic field by personnel or the
public. Maintain this distance with measures including but not limited to:
Plan to situate the equipment or facility in an area inaccessible and undisclosed to the
public.
Allow only authorized and trained personnel to access the site.
Before entering the restricted area, personnel should be aware that it is restricted and
shut down the transmitter.
Set clear signs at the site to remind personnel that the area is restricted.
Conduct regular post-installation monitoring and checks.
Set effective physical shields and warning signs in all areas with excessive
electromagnetic field exposure.
Install an isolating device around the equipment structure.
Comply with local regulations during operation.
Safety Information
Installation and Usage of a Wireless Base Station Transceiver
A base transceiver station (BTS) is designed to emit less RF electromagnetic radiation than
the maximum standard hazardous limit. A normal working BTS is therefore not harmful to the
public and operating personnel. Defective antenna cables or other defects may however result
in the emission of excessive RF electromagnetic radiation.
Personnel must abide by the following rules during BTS installation and operation:
Read through all safety recommendations and comply with local regulations before
proceeding.
Before installing or maintaining an antenna close to the tower or mast with a BTS and its
antenna, contact related personnel to switch off the antenna transmitter.
Personnel at the site should carry a radiation monitoring and alarm instrument.
To shield the public from electromagnetic field exposure, abide by the following guiding
principles during BTS antenna site installation:
Install rooftop antennas out of reach of human activity.
Install rooftop transmission antennas away from areas with high traffic, such as the
rooftop access point, telephony service point, and HVAC equipment.
Install rooftop directional antennas on the periphery and facing away from buildings.
Choose the most suitable antenna size by balancing better signal coverage with less
visual impact.
Install antennas as far away as possible without compromising local area requirements.
Exercise caution when constructing a common installation site for antennas from
different manufacturers, especially high-power broadcasting (FM/TV) antennas.
Installing antennas in one site increases safety risks.
Take special preventive measures at antenna sites next to hospitals or schools.
Usage of Other Wireless Equipment
Apply the safe distance from electromagnetic field exposure specified by any related
equipment manual.
Such distance is not specified for equipment with low RF transmit power that meets
electromagnetic field exposure requirements.
Such distance is not specified for specially-designed equipment that meets
electromagnetic field exposure requirements for working in close proximity.
Usage of High-voltage Equipment or Facilities
Since only high voltages (such as over 100 kV) generate harmful electromagnetic fields,
the usage of such equipment or facilities must be evaluated according to requirements.
1.5.2 Laser Radiation
When handling optical fibers, do not stand close to or look into the optical fiber outlet directly
without eye protection.
Safety Information
Use of controls or adjustment or performance of procedures other than those specified herein
may result in hazardous radiation exposure.
A laser transceiver is used in optical transmission system and related test tools. The laser
transmitted through unterminated optical fibers or connectors has very high power
density and is invisible to human eyes. A beam of light can cause damage to the retina.
Looking into the end of an exposed optical fiber or broken optical fiber without eye
protection from a distance of more than 150 mm (5.91 in.) will not cause eye injury.
However, eyes may be damaged if an optical tool such as a microscope, magnifying
glass, or eye loupe is used to view a bare optical fiber end.
Observe the following precautions to avoid laser radiation hazards:
− Only trained personnel are authorized to operate the laser.
− Wear protective goggles during laser or optical fiber operation.
− Disconnect the light source before disconnecting optical fiber connectors.
− Use optical fiber caps to protect the disconnected optical fiber connectors.
− Use an optical power meter to measure optical power and verify that the light source
is disconnected.
− Do not look into an exposed optical fiber or connector terminal until the light source
is off. Immediately install dust-proof caps onto exposed optical fiber connectors.
− Ensure that the optical fibers and light source are disconnected before fiber cutting or
splicing.
− Ensure that there is no laser radiation before opening the front door of the optical
transmission system.
− Do not view optical fiber terminals or connectors with a microscope, magnifying
glass, or eye loupe.
1.6 Mechanical Safety
Hoisting Heavy Objects
Avoid walking areas under heavy objects being hoisted.
Hoisting operators must be trained and qualified.
Hoisting tools must be checked and complete.
Before hoisting, fasten all tools to fixed load-bearing objects or walls.
During hoisting, ensure that angles between lifting straps are under 90°, as shown in
Figure 1-2.
Safety Information
Figure 1-2 Hoisting heavy objects
Ladder Usage
Before using a ladder,
− Check that it is intact and confirm its load bearing capacity. Do not overload it.
− A gradient of 75° is recommended between the ladder and the ground as measured
with an angle square shown in Figure 1-3. Place the wider feet at the bottom or take
protective measures to avoid skidding. Place the ladder on a stable surface.
Figure 1-3 Ladder tilt angle
When climbing a ladder:
− Maintain your center of gravity within the ladder edges.
Safety Information
− Keep your body balanced when climbing.
− Do not climb higher than the fourth rung from the top.
To climb to a rooftop, ensure that the ladder has at least 1 m (3.28 ft.) extra height above the
rooftop, as shown in Figure 1-4.
Figure 1-4 1 m (3.28 ft.) excess height of the ladder above the rooftop
Drilling Holes
Pay attention to the following safety precautions when drilling holes on the wall or ground.
Do not drill unauthorized holes on cabinets. Incorrectly drilled holes will damage cabinet
electromagnetic shielding and internal cables. Metal scraps generated in drilling may also
short circuit the cabinet boards.
Wear protective goggles and gloves when drilling.
Cover equipment before drilling to prevent metal scraps from entering the equipment
interior. Remove these scraps immediately after drilling.
Transporting Heavy Objects
Adopt a load bearing posture before moving heavy objects to avoid sprains or other
injuries. When transporting a cabinet, keep your back straight and avoid sudden
movement.
When transporting equipment by hand, wear gloves to protect against sharp edges.
When moving or lifting a shelf, hold it by its handles or bottom edge instead of the
handles of installed cabinet modules such as power modules, fan modules and boards.
Safety Information
1.7 Maintenance Safety
Wear an ESD wrist strap when replacing accessories or parts. Ensure that one end is
grounded and the other end properly contacts the skin.
When replacing parts, account for all parts, bolts, and tools and prevent them from
dropping into fans and causing damage to equipment.
When replacing cabinet shelves or parts, exercise caution when pulling them out to
prevent injury resulting from falling objects.
Fuse Replacement
Replace fuses with the same type and rating.
Disconnect the equipment power supply before replacement to prevent electric shock and
injury.
Install replaceable fuses on the panel next to the AC/DC power input or output ports.
Refer to the specifications of backup or panel fuses to select the fuse type for
replacement. Using fuses of different specifications may cause equipment damage,
bodily injury, and financial loss.
Fuse Welding
If the fuse rating is silkscreened on the board, Huawei authorized personnel will replace
fuses with the specified rating.
If the fuse rating is not silkscreened on the board, do not maintain board fuses on site.
Return them to the depot for repair. Huawei authorized personnel replace fuses using the
supplier model and rating in the bill of materials (BOM).
Power Distribution Box and Board Replacement
Wear insulation gloves and ensure that the external-equipment circuit breaker is
disconnected before proceeding.
When replacing a board, do not touch its components to avoid damage.
Install filler panels in all vacant slots.
Fan Replacement
Pull out a part of the fan module by its handles, wait until the fan completely stops rotating,
and then remove the fan module from the subrack. Keep fingers away from fan blades.
Battery Replacement
For details, see section 1.4 "Battery Safety."
Safety Information
1.8 Safety Signs
Laser Class
Laser class sign: Class 1
Laser class sign: Class 1M
These signs warn you not to approach optical fibers without eye protection or look
directly into optical fiber connectors.
For other precautions, see the laser part in 1.5.2 "Laser Radiation."
Equipment Weight
The replaceable/pluggable part or equipment is
over 18 kg (40 lbs) and requires two people to transport it.
The replaceable/pluggable part or equipment is
over 32 kg (70 lbs) and requires three people to transport it.
The part or equipment is over 55 kg (121 lbs) and
requires a pallet truck or four people to transport it.
Safety Information
Dust Filter Maintenance
This sign reminds you to regularly clean and
replace dust filters.
Interlocking Kit Warning
After the door to outdoor equipment is opened,
keep it open with a secure metal rod to prevent accidental closing. Remove the rod to close
the door.
This sign prompts you to lift the rod before closing the door.
High-voltage Cover Removal
This sign reminds you to read the safety manual
to understand all precautions before removing the cover.