Huawei RRU Hardware Maintenance Manual page 19

RRU
Hardware Maintenance Guide
Emergency power-off may damage the RRU. Therefore, do not perform an emergency
power-off in normal cases.
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Issue 16 (2015-03-23)
Shut off the external input power of the power equipment for the RRU.
If time permits, on the power equipment for the RRU, set the corresponding circuit
breaker to OFF or remove the corresponding EPC connector.
Optional: Perform the following operations to check whether the power-off operation
succeeds for AC RRUs:
Use an electroprobe or multimeter to check whether the equipment shell is energized. If
it is, the power-off operation fails. In this case, perform the power-off operation again.
Use a multimeter to check whether the equipment port voltage is 0. If it is not, the
equipment fails to be powered off. In this case, perform the power-off operation again.
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3 Powering On and Off an RRU
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