TP48200E-H12C1 (Nepal, Ncell)
User Manual
4 Maintenance
Issue 01 (2015-05-05)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
26
4.2.22 Multi-Rect. Fault
Possible Causes
The subrack or slot connectors are faulty.
The rectifiers are faulty.
The monitoring unit is faulty.
Measures
1.
Remove the rectifiers and check whether the slot connectors are damaged or deformed. If
yes, repair or replace the subrack or slot connectors.
2.
If the alarm persists after the rectifiers are reinstalled, replace the rectifiers.
3.
If the alarm persists after the monitoring unit is restarted, replace the monitoring unit.
4.2.23 Rect Fault
Possible Causes
The rectifier is in poor contact.
The rectifier is faulty.
Measures
1.
Check the Fault indicator on the rectifier panel. If it is steady red, remove the rectifier,
and then reinstall it after the indicator turns off.
2.
If the alarm still exists, replace the rectifier.
4.2.24 Rect Protection
Possible Causes
The rectifier input voltage is too high.
The rectifier input voltage is too low.
The ambient temperature is too high.
The rectifier is abnormal.
Measures
1.
Check whether the AC input voltage exceeds the upper threshold of the rectifier working
voltage. If yes, rectify the power supply fault and then resume the power supply.
2.
Check whether the AC input voltage is below the lower threshold of the rectifier working
voltage. If yes, rectify the power supply fault and then resume the power supply.
3.
Check whether the ambient temperature is higher than the normal operating temperature
of the rectifier. If yes, check and rectify the temperature unit fault.
4.
Remove the rectifier that generates the alarm and reinstall it after the indicator turns off.
If the alarm still exists, replace the rectifier.