Pass the Huawei HCSP-Field H20-923_V1.0 Questions and answers with CertsForce

In Huawei SmartLi 3.0, the BCU acts as the cabinet-level “brain” of the lithium battery system, coordinating measurement, control, protection, and communication. Itmanages and supervises BMUsinside the cabinet by collecting key operating data such as voltage, temperature, SOC, and SOH, and by aggregating module information for higher-level management. The BCU supportscharge/discharge managementby monitoring string current and controlling operating behaviors to keep the battery within safe electrical and thermal limits. To ensure consistent performance across parallel strings and cabinets, it implementsintelligent voltage sharing and active current balancing, which helps equalize currents, improve utilization, and reduce uneven aging. For safety and reliability, the BCU providesfault diagnosis and protection, including handling events such as overvoltage, undervoltage, overcurrent, and overtemperature, and it can isolate abnormal loops when required. SmartLi 3.0 also incorporatesinternal short-circuit risk predictionas part of its safety strategy. Finally,group capacity testingis supported as a maintenance function to verify usable capacity and system health.

In a lithium battery cabinet, any exposed conductive part that is electrically connected to the DC power path can present shock and arc risk, especially when technicians are using tools in a narrow space. Thegeneral positive/negative terminalsare the cabinet-level high-energy connection points, and accidental contact or bridging with a metal object can cause severe DC arcing, burns, and equipment damage. Thebattery positive and negative terminalson individual modules are also hazardous because each module contributes to the total string voltage and fault current capability. In addition, theshort-circuit copper bar between battery modulesis a direct conductive link in the series/parallel connection; it can be energized and can create an instant short circuit if contacted by tools, jewelry, or loose hardware. Huawei maintenance safety practice therefore requires insulating covers, protective shields, and strict tool control to prevent exposed hands or metal objects from contactinganyof these areas. Protecting all listed points reduces electric shock risk, prevents arc flash/arc burn incidents, and avoids unintended cabinet trips or permanent damage to terminals and busbars.

In Huawei lithium battery cabinet alarm design, the MDU indicator and buzzer are coordinated to help O&M personnel immediately judge alarm severity without logging into a management system. Acritical alarmindicates that the battery system may no longer be in a fully safe or supported operating state and requires urgent handling, such as load protection actions, isolation, or immediate inspection. For this highest severity level, the cabinet uses the most prominent visual pattern:red with fast blinking, paired with acontinuous buzzer, to ensure the condition cannot be overlooked in an equipment room environment. Yellow indicators are reserved for lower severities such as warnings or minor/major alarms, where the system remains controllable and the required response can be scheduled. A steady red is typically used to indicate a persistent fault state or stop condition, whereasfast blinking red + continuous buzzeris the clear “critical, urgent” combination that triggers immediate on-site response and rapid fault localization (such as checking protection events, contactor status, temperature/voltage exceptions, and isolation conditions).

Huawei green data center concepts focus on reducing energy consumption through engineering controls rather than sacrificing resilience. Raising the allowable supply air temperature is a proven efficiency lever because it reduces compressor workload, expands economization opportunities where applicable, and can reduce fan energy when airflow is optimized. However, it must be implemented with airflow management—especially hot/cold aisle containment—to ensure server inlet temperatures remain within safe limits. Adaptive control is critical: monitoring rack inlet temperatures, cooling unit performance, and environmental conditions allows the system to dynamically adjust cooling output, fan speed, and setpoints to match real IT load. This avoids the common inefficiency of “overcooling for safety.” When combined with standardized O&M procedures, alarm thresholds, and continuous trend analysis, the strategy improves overall energy performance while preserving reliability and service continuity. In contrast, permanent oversizing or forcing all redundant systems to run fully loaded wastes energy and can reduce operating efficiency. Properly engineered, monitored optimization delivers efficiency gains with controlled operational risk.

In Huawei data center facility management,NetEcois the management software platform (server/application) used to centrally monitor and manage sites, whileiBMCis the out-of-band hardware management interface used forserver remote maintenance(such as power control, hardware health, BIOS settings, and remote console) on the specific server where iBMC exists. TheiBMC port is not a service access interface for NetEco. NetEco’s backend services are accessed through theserver operating system network interfaces(management/service network) and corresponding application ports after the server is properly networked and configured. Even if NetEco is deployed on a Huawei server that has iBMC, iBMC only provides a channel to manage the server hardware and does not expose NetEco application access as an official commissioning/O&M path. Therefore, NetEco backend access should be planned via the site’s management network (IP addressing, routing, security policy), not via iBMC.

Huawei’s indirect evaporative cooling system is designed to use theoutdoor air as a “free” cold sourcewhile keeping the data hall supply air isolated from outdoor contaminants and moisture. Its core is theheat exchanger, where heat from the indoor (return) air side is transferred to the outdoor working air side without mixing the two air streams. To enhance heat removal on the outdoor side, aspray systemwets the evaporation media or spray section, and awater pumpcirculates water to maintain uniform wetting and stable evaporation performance.Fansdrive airflow through the indoor and outdoor paths to ensure sufficient heat transfer and maintain the required air volume and pressure. Because outdoor air is involved on the working-air side,air filtersare required to reduce dust and protect the heat exchanger and internal airflow channels, improving reliability and reducing maintenance. Acompressoris not a main component of indirect evaporative cooling because the system primarily relies on evaporation and heat exchange rather than mechanical refrigeration.

As data center power density increases (especially driven by AI and high-performance computing), the industry trend is to adoptliquid coolingin high-density scenarios because liquid has much higher heat transfer capability than air, enabling stable cooling where rack power is very high. This makes statementAtrue. The combination ofCloud + AIpushes operators to reduce PUE and total energy cost through more intelligent control, higher efficiency cooling architectures, and integrated energy management, so statementBis also true. For large data centers, another clear trend is increasingchilled-water supply/return temperatures(higher inlet and outlet temperatures). Warmer water improves chiller efficiency, expands the number of hours that free cooling can be used, and reduces compressor work, soDis true. However,evaporative coolingis not universally the “main solution” for large data centers because it is climate- and water-condition dependent and is typically deployed as one option among multiple architectures rather than the dominant default everywhere. Therefore,Cis the incorrect statement.

Free cooling is a mainstream energy-saving concept in data center cooling design, used to reduce chiller compressor runtime by leveraging low outdoor temperatures (air-side) or low cooling-water temperatures (water-side) during suitable seasons. Therefore, describing the technology as “not mature enough and should be used with caution” is the false statement when discussing its advantages. In practice, free cooling has broad industry adoption and is considered a proven approach when applied with correct engineering, such as proper filtration, anti-condensation control, heat exchanger selection, and automatic control strategies. Its advantage is that it can directly utilize the outdoor “cold source” to remove heat, which significantly reduces cooling power consumption compared with full mechanical refrigeration, improving overall energy efficiency and supporting lower PUE targets. It also makes full use of seasonal and day-night temperature differences: the system dynamically switches among free cooling, partial free cooling, and mechanical cooling to balance reliability and efficiency. The key point is maturity: the benefit of free cooling comes from well-established principles and widely implemented architectures, not experimental technology.