Huawei MTS9300A - 4.2 Identifying Component Faults; 4.2.1 Identifying Rectifier Faults; 4.2.2 Identifying Circuit Breaker Faults; 4.2.3 Identifying SMU Faults

Maintenance
Interval
Maintenance
Item
Measure
Connection Check the bolt at every terminal and tighten any loose bolt.
If a cable temperature exceeds 40°C (feels hot), locate the cause.
Semi-annual Voltage ● Measure and record the busbar voltage and the positive and
negative voltages of ESMs when charging is about to
complete. Ensure that the voltages are the same. If the
voltages are dierent, check for cable faults and rectify them.
● In the rst year, collect real-time data when discharging is
about to complete at least once every six months. If a network
management system is
congured, collect data remotely.
● From the second year, check the capacity quarterly.
4.2 Identifying Component Faults
4.2.1 Identifying Rectier Faults
The following lists the rectier faults
● The AC input and slot connector are normal, but the Fault indicator (red) is
steady on or all indicators are o.
● The slot connector and SMU are normal, but the Alarm indicator (yellow) still
blinks after the
rectier is reinstalled.
● The AC input and SMU are normal, but the SMU cannot control the rectier.
4.2.2 Identifying Circuit Breaker Faults
If the load fuse is blown, it indicates that the circuit breaker trips. If the circuit
breaker is switched on and the downstream device is still not powered (the busbar
has power), the circuit breaker is faulty and needs to be replaced.
4.2.3 Identifying SMU Faults
The following lists the SMU faults:
● The DC output is normal but the green indicator on the SMU is
o.
● The SMU breaks down or cannot be started. Its LCD has abnormal display or
buttons cannot be operated.
● With alarm reporting enabled, the SMU does not report alarms when the
power system is faulty.
● The SMU reports an alarm whereas the power system does not experience the
fault.
● The SMU fails to communicate with the connected lower-level devices even
though the communications cables are correctly connected.
● Communication between the SMU and all
rectiers fails even though the
rectiers and the communications cables are normal.
MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual 4 Maintenance
Issue 06 (2021-10-13) Copyright © Huawei Technologies Co., Ltd. 49