RRU
Hardware Maintenance Guide
3 Powering On and Off an RRU
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Procedure
Step 1 On the power epuipment for the RRU, set the corresponding circuit breaker to ON or insert a
corresponding EPC connector.
Do not look into the optical module without eye protection after the RRU is powered on.
Step 2 Wait 3 to 5 minutes, and then check the status of the indicators on the RRU. For details, see
section "RRU Indicators" in the hardware description of the corresponding RRU.
If RRUs are cascaded, check the status of all RRU indicators.
Step 3 Take corresponding actions based on the status of the indicators.
The RRU is working properly
End the power-on check task.
On the power equipment for the RRU, set
the corresponding circuit breaker to OFF or
remove the corresponding EPC connector.
Rectify the fault, and then go to Step 1.
----End
3.2 Powering Off an RRU
An RRU can be powered off in two ways: normal power-off and emergency power-off. You
need to perform a normal power-off in scenarios such as an equipment swap or foreseeable
regional blackout, and you need to perform an emergency power-off in emergencies such as a
fire, smoke, or water damage in the equipment room.
Procedure
Normal power-off
If RRUs are cascaded, services carried on the lower-level RRU may be interrupted during the
replacement of the upper-level RRU.
1. On the power equipment for the RRU, set the corresponding circuit breaker to OFF or
remove the corresponding EPC connector.
Emergency power-off
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