Identifying Component Faults; Identifying Rectifier Faults; Identifying Circuit Breaker Faults; Identifying Smu Faults - Huawei MTS9300A User Manual

MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual
Maintenance Maintenance
Interval Item
Connection
Semi-annual Voltage

4.2 Identifying Component Faults

4.2.1 Identifying Rectifier Faults

The following lists the rectifier faults
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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:
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Issue 06 (2021-10-13)
Measure
Check the bolt at every terminal and tighten any loose bolt.
If a cable temperature exceeds 40°C (feels hot), locate the cause.
● 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 different, check for cable faults and rectify them.
● In the first year, collect real-time data when discharging is
about to complete at least once every six months. If a network
management system is configured, collect data remotely.
● From the second year, check the capacity quarterly.
The AC input and slot connector are normal, but the Fault indicator (red) is
steady on or all indicators are off.
The slot connector and SMU are normal, but the Alarm indicator (yellow) still
blinks after the rectifier is reinstalled.
The AC input and SMU are normal, but the SMU cannot control the rectifier.
The DC output is normal but the green indicator on the SMU is off.
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 rectifiers fails even though the
rectifiers and the communications cables are normal.
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