If the temperature dierence is undetermined, wait one night before installing the
equipment.If the temperature dierence is undetermined, wait one night before
installing the equipment.
In damp scenarios such as subways and tunnels, power on the equipment within
24 hours after unpacking to prevent condensation. During future maintenance,
ensure that the power-o time does not exceed 24 hours.
Power Module
● A power module will enter the protection state upon input overvoltage,
undervoltage, overtemperature, or output overcurrent. Note that when a
power module enters the overtemperature protection state, take measures to
lower the ambient temperature. The power module can automatically resume
power supply when the temperature falls within the normal range. After a
power module enters the protection state, the module will report a
corresponding protection state alarm to the MPU and cannot properly supply
power to the device. Note that a faulty fan module will also report fault
information to the MPU. If the power module cannot automatically resume
power supply after the triggering condition of the protection state is removed,
remove the power module from the chassis and reinstall it at least 30s later.
The power module then can work properly.
Cable
● To protect personal safety, do not install power cables when the power is on.
Before connecting power cables, make sure that the power switches of the
external power supply system and the device are all in OFF position.
● Before connecting signal cables, take ESD protection measures, for example,
wear ESD gloves or an ESD wrist strap.
● Before connecting Ethernet cables, use an Ethernet cable tester to test cable
connectivity.
● Both ends of an idle high-speed cable must be covered by an ESD cap.
● The bend radius of high-speed cables must be larger than the minimum bend
radius. Overbending high-speed cables may damage wires in the cables.
● Laser beams will cause eye damage. Do not look into bores of optical
modules or optical
bers without eye protection.
● Cover idle optical ports and optical modules with dust plugs and cover idle
optical
bers with dust caps.
● Bundle optical
bers with binding tape. Apply appropriate force to ensure that
the optical bers in a bundle can be moved easily.
● Fiber connectors must be tidy and clean to ensure normal communication. If
a
ber connector is contaminated, clean it using a piece of ber cleaning
fabric.
HUAWEI NetEngine 8000 F
Hardware Guide 4 Hardware Installation and Parts Replacement
Issue 05 (2023-03-31) Copyright © Huawei Technologies Co., Ltd. 521
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