Huawei MTS9300A - 4.1.3 Rectifier

No. Maintenance Item If... Then...
6 Check whether a DC
output circuit breaker
is OFF and a fuse is
blown.
● Load overcurrent
occurs.
● Load short-circuit
occurs.
Rectify any overcurrent
or short circuit. Turn
on the circuit breaker
or replace the fuse.
7 Check for DC busbar
overvoltage.
A rectier is
abnormal.
Replace the abnormal
rectier.
8 Check for DC busbar
undervoltage.
● The AC power
supply has failed.
● The system is
overloaded.
● A rectier is
abnormal.
1. Resume the AC
power supply.
2. Check the load
status and rectify
faults if any.
3. Replace the
abnormal
rectier.
9 Check whether the
temperature of a DC
busbar working at
room temperature
exceeds 95°C.
● The DC busbar is
loose or in poor
contact.
● The system is
overloaded.
1. Check and secure
cabinet busbar
connections.
2. Check the load
status and rectify
faults if any.
4.1.3 Rectier
Table 4-3 Rectier maintenance
No.
Maintenance Item Possible Fault Cause Suggestion
1 Check the green indicator
status (normal: steady on).
O:
● There is no AC input.
● The rectier is faulty.
1. Check the rectier AC
input.
2. Replace the rectier.
MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual 4 Maintenance
Issue 06 (2021-10-13) Copyright © Huawei Technologies Co., Ltd. 44