TP48200E-H12C1 (Nepal, Ncell)
User Manual
4 Maintenance
Issue 01 (2015-05-05)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
25
Possible Causes
There is smoke inside the cabinet.
The smoke sensor is faulty.
Measures
1.
Check whether there is smoke inside the cabinet. If yes, disconnect the power supply
from the cabinet, handle the fault, and then resume system operation and clear the alarm
on the SMU.
2.
Check whether the smoke sensor is faulty. If yes, replace the smoke sensor.
4.2.20 Rectifier Missing
Possible Causes
Certain rectifiers are not powered on.
The rectifier is faulty.
The subrack or slot connector is faulty.
The monitoring unit is faulty.
Measures
1.
Check whether the rectifier circuit breakers corresponding to undetected rectifiers are
ON. If no, switch them on.
2.
Check whether the rectifier is removed. If yes, find the cause and reinstall it.
3.
Replace the rectifier if it is faulty.
4.
Check whether certain rectifiers in the rectifier subrack do not work properly. If yes,
remove the rectifiers that do not work and check whether their slot connectors are
damaged or deformed. If yes, repair or replace the subrack or slot connectors.
5.
If the alarm persists after the preceding measures are taken and the monitoring unit is
restarted, replace the monitoring unit.
4.2.21 Single Rect Fault
Possible Causes
The subrack or slot connector is faulty.
The rectifier is faulty.
The monitoring unit is faulty.
Measures
1.
Remove the rectifier and check whether the slot connector is damaged or deformed. If
yes, repair or replace the subrack or slot connector.
2.
If the alarm persists after the rectifier is reinstalled, replace the rectifier.
3.
If the alarm persists after the monitoring unit is restarted, replace the monitoring unit.