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| Section | Objectives |
|---|---|
| Data Center Facility Overview | - Huawei Data Center Facility Solution Portfolio - Data Center Facility Concepts and Development Trends - Typical Data Center Scenarios and Requirements |
| Modular Data Center | - Huawei FusionModule Series - Modular Data Center Concepts and Benefits - Design, Delivery, and Installation |
| Data Center Infrastructure Management (DCIM) | - Monitoring and Alarm Management - Energy Efficiency Management - DCIM System Architecture |
| Power Supply and Distribution System | - Power Supply and Distribution System Architecture - Power Distribution Unit (PDU) and Power Distribution Architecture - UPS System Principles and Configuration - Battery Systems and Reliability |
| Cooling System | - In-Row and In-Rack Cooling Units - Free Cooling Technologies - Air-Cooled and Water-Cooled Chillers - Cooling System Architecture and Design |
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24. Frage
Which of the following can be used to start the inverter of the UPS5000-H?
Antwort: A,B
Begründung:
For the Huawei UPS5000-H, inverter startup is executed through the UPS's own control interfaces, which provide the "Running Control / Inv. ON" operation with the required confirmations and permissions. The UPS LCD (MDU touchscreen) supports inverter startup through menu operations such as selecting inverter start functions and confirming the action after authentication. The UPS WebUI also provides the same operational control path, where an operator logs in and issues the Inv. ON command under the UPS monitoring/running control pages. These two interfaces are part of the UPS monitoring and control design and are explicitly used for commissioning and routine O&M actions.
By contrast, ECC (data center controller) and NetEco (management platform) are mainly used for site-level monitoring, alarm collection, visualization, reporting, and centralized management.
While they can display UPS status and alarms (and may integrate with UPS data), inverter startup is defined as a UPS running control operation performed on the UPS's LCD or WebUI control plane to ensure proper authorization, safety checks, and command traceability.
25. Frage
Which of the following statements are true?
Antwort: A,C,D
Begründung:
In Huawei UPS operating logic and standard data center O&M practice, themaintenance bypassis a mechanical path used to isolate the UPS for service. Innormal modethe load is carried by the inverter, so you shouldnot directly close the maintenance bypasswithout a controlled transfer procedure; doing so can create an unsafe parallel path or impact synchronization, therefore statementA is false. Instatic bypass mode, the load is supplied through the bypass path; if the bypass/mains source fails, the UPS can perform an automatic transfer from bypass to inverter, and the inverter will be supported by thebatterythrough the DC link, soB is trueunder the expected functional behavior.UPS5000-His designed as amodular UPS, supportingonline (hot) replacementof power modules to restore capacity without shutting down the entire system, soC is true. If therectifier mains input and bypass input share the same source, a mains outage removes the bypass source as well, meaning bypass operation is not available, soD is true.
26. Frage
The FusionCol8000-A230 unit uses two systems. Each system uses three compressors connected in parallel and two EEVs.
Antwort: B
Begründung:
For FusionCol8000-A230, the "two systems" part is correct: Huawei's quick guide explicitly states that theindoor and outdoor units consist of two independent cooling systems, which is the basis for redundancy and staged capacity control.
However, the rest of the statement ("each system uses three compressors connected in parallel and two EEVs") is not supported as a fixed, universal configuration in the installation/commissioning guide text that is available here. In Huawei smart cooling designs, compressor quantity and the number of electronic expansion valves (EEVs) aremodel- and configuration-dependentand are tied to how the refrigerant circuit is partitioned (for example, multiple compressor stages for capacity modulation, and one or more EEVs for different evaporator branches). Because the documentation we can directly verify confirmstwo independent systemsbut doesnotconfirm "three compressors per system" as an explicit requirement, the combined statement (two systems + specific compressor/EEV counts) is judgedfalse: one part is verified true, while the detailed component count cannot be confirmed as stated.
27. Frage
The software installation package does not need to be downloaded for the preinstalled server.
Antwort: B
Begründung:
In Huawei delivery scenarios, apreinstalled servermeans the target software (for example, the NetEco platform and its required runtime components) has already been deployed and integrated on the server image before it is handed over for on-site commissioning. Because the installation media has already been applied, the on-site engineer's work typically shifts from "software installation" to "environment verification and initialization," such as confirming OS/service status, checking resource allocation, validating database and middleware health, verifying network planning (IP, gateway, DNS/NTP as required), and completing application-level initialization (site creation, user/role configuration, northbound interface settings, and device
/model import if needed). In this case,downloading the full installation package is not a mandatory stepfor commissioning, because the package is mainly required when performing a fresh installation or reinstall
/upgrade. However, standard practice is still to prepare supporting materials (patches, licenses, and compatibility documents) and ensure the preinstalled version matches the project baseline before acceptance.
28. Frage
When the outdoor unit is installed at a position higher than the indoor unit, install an oil trap every five to six meters in the vertical direction along the gas pipe to ensure system reliability.
Antwort: B
Begründung:
This statement is true. In split DX/precision cooling refrigerant systems, the "gas pipe" typically refers to the suction line returning refrigerant vapor (and entrained compressor oil) from the indoor evaporator to the outdoor unit/compressor. When the outdoor unit is higher than the indoor unit, the suction line includes a vertical riser. Oil naturally tends to settle and flow downward under gravity, so without proper piping measures, oil may accumulate in low points or fail to be carried upward consistently, leading to poor oil return. Insufficient oil return can cause compressor lubrication issues, abnormal noise, overheating, reduced efficiency, and long-term reliability risks. Installing oil traps at the bottom of the riser and then every 5? meters of vertical lift helps collect oil and allows it to be periodically swept upward by refrigerant velocity, maintaining stable oil circulation. This requirement is especially important in data center cooling because continuous operation and high availability demand reliable compressor lubrication and stable refrigerant flow under varying load conditions.
29. Frage
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