Huawei Airbridge cBTS3612 Maintenance Manual page 58

On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station
Amplifier Over-Excited alarm as well as automatically shut down; If
the external alarm conditions are eliminated, the BHPA will resume to
the normal working status.
b) Power amplifier over-heated alarm:
The Over-Heated alarm indicates the temperature changes of
the BHPA. When an Over-Heated alarm is generated, the BHPA will
shut down automatically. When the temperature of the BHPA is
between 90âC~100âC, the BHPA will also generate an Over-Heated
alarm and shut down automatically. The restoration threshold of the
Over-Heated alarm is 75âC~85âC.
Find out if there is a Power Amplifier Over-Excited alarm or
Module Over-Heated alarm by querying the current alarms from the
OMC or BTS local maintenance console.
The fault elimination process should be carried out step by step,
go directly to next step if the problem can not be solved:
Check if the RF output power of the BTRM is too high, if so,
l
decrease it.
Check if the fan for BHPA is working properly.
l
Check if the cable connecting the Power Amplifier module
l
of the BHPA and the RF fan monitoring board are in good
condition.
2) Faulty cable/connector connection
BHPA uses blind mate to connect to the BTRM, CDU (or DFU,
DDU) and power source via the backplane. Abnormal input/output
connection will result in the BHPA having no RF signal output.
Chapter 3 Component Failure
3-21
Handling