Latest Huawei H20-923_V1.0 PDF and Dumps (2026) Free Exam Questions Answers
Pass Your HCSP-Field H20-923_V1.0 Exam on Apr 04, 2026 with 62 Questions
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NEW QUESTION # 37
When a critical alarm is generated for the unit, the indicator on the LCD controller turns red and the buzzer beeps continuously.
- A. True
- B. False
Answer: A
Explanation:
In Huawei data center facility equipment (such as precision cooling units and related controllers), alarm presentation follows a clear severity-based design so technicians can recognize urgency immediately without entering detailed menus. Acritical alarmrepresents the highest severity level and is treated as a condition that may impact safe operation, cooling continuity, or equipment protection. For this reason, the LCD controller uses the most prominent visual and audible indications: theindicator turns redto show critical severity, and thebuzzer sounds continuouslyto ensure the alarm cannot be overlooked in a noisy equipment-room environment. This behavior supports rapid response: O&M personnel can quickly identify that immediate action is required, then open the alarm list to locate the root cause, confirm whether the unit has derated or stopped, and execute the prescribed troubleshooting steps (for example, checking power status, sensor readings, fan/compressor status, water flow/pressure, and protection interlocks). Therefore, the statement correctly describes the standard critical-alarm indication method on the LCD controller.
NEW QUESTION # 38
When tightening the screws (M16x50 mm) for the output power cables of lithium battery cabinets, what torque should be used to tighten and verify the screws?
- A. 80 N m
- B. 100 N m
- C. 120 N m
- D. 60 N m
Answer: C
Explanation:
For Huawei SmartLi lithium battery cabinets, the output power cable termination uses high-current DC conductors, so the mechanical fastening torque is strictly specified to ensure both safety and long-term reliability. ForM16x50 mm screwsused on the+/N/# output cable terminals, the specified tightening
/verification torque is120 N m. This torque requirement is defined to achieve the correct clamping force between the DT terminal lug and the cabinet busbar/terminal surface. If the torque is below the requirement, contact resistance increases, which can lead to abnormal heating during charge/discharge, voltage drop, alarm events, and accelerated oxidation at the joint. If the torque is excessive, it can damage threads, deform the lug or busbar contact area, and introduce hidden mechanical stress that may loosen over thermal cycles. During commissioning and routine maintenance, technicians use a calibrated torque wrench to tighten and then re- verify each connection to the specified value to prevent hotspots and ensure stable operation under peak current conditions.
NEW QUESTION # 39
During routine maintenance of the lithium battery cabinet, which of the following procedure is true about replacing a faulty battery module?
- A. 1-6-2-5-3-7-4
- B. 1-2-3-6-5-7-4
- C. 1-3-2-6-5-7-4
- D. 1-6-3-2-5-7-4
Answer: D
Explanation:
The correct sequence prioritizeselectrical safety first, then mechanical disassembly. You mustconfirm the batteries are not discharging(Step 1) to avoid working under load. Next, the cabinet must be placed into a safe powered-down state byswitching off the battery circuit breaker and long-pressing the POWER ON/OFF button to power off the cabinet(Step 6). Only after the cabinet is safely powered down should you open up the working area byremoving the front covers of the faulty module and adjacent modules(Step 3). Then youturn off the ready switchon the battery management module (Step 2) to prevent the system from re-enabling the module unexpectedly during maintenance. After that, youloosen the securing bolts and pull out the battery management module about 10 cm(Step 5) to create operating space and ensure isolation for subsequent operations. With the cabinet safely stopped, you canremove the cables and copper barsconnected to the faulty module (Step 7), and finallyremove the baffle plate and pull out the faulty battery module(Step 4).
NEW QUESTION # 40
After the unit is powered on for the first time, it enters the compressor preheating state. To quickly perform power-on commissioning, you can manually shut down the compressor preheating.
- A. False
- B. True
Answer: A
Explanation:
Compressor preheating is a protection mechanism used during first power-on (and after long power-off periods) to improve compressor reliability before allowing refrigeration startup. The preheating function warms the compressor oil and reduces refrigerant migration and oil dilution, which otherwise can lead to liquid refrigerant in the compressor crankcase. If the compressor starts when oil is diluted or when liquid refrigerant is present, it increases the risk of abnormal noise, poor lubrication, high mechanical stress, and even liquid strike, which can damage the compressor and shorten service life. For data center cooling equipment, where continuous reliability is essential, the commissioning logic treats preheating as a required prerequisite for safe compressor operation. Therefore, O&M practice does not recommend bypassing or manually shutting down compressor preheating just to accelerate commissioning. The correct approach is to keep the unit energized and allow the preheating period to complete, then proceed with commissioning steps (fans, cooling system tests, alarms, and control verification) under proper protection conditions.
NEW QUESTION # 41
The NetEco supports manual backup and automatic backup.
- A. True
- B. False
Answer: A
Explanation:
NetEco is a management platform that stores critical operational data, including site configuration, device models, user/role information, historical alarms, trend data, reports, and northbound integration settings. To protect these assets and ensure service continuity, NetEco provides a built-in backup mechanism that supports bothmanualandautomaticbackup modes.Manual backupis typically used before major operations such as version upgrades, configuration changes, northbound interface adjustments, or large-scale device onboarding, so engineers can create a restore point on demand.Automatic backupis used for routine risk control and is normally implemented through scheduled tasks, allowing backups to be generated at defined intervals to reduce data-loss exposure in case of hardware failure, system corruption, or accidental misconfiguration. In standard O&M practice, automatic backups are combined with retention policies (for example, keeping a rolling set of backup files), storage capacity checks, and periodic restore verification to confirm backup integrity. This dual-mode backup capability is a foundational requirement for stable long-term operation of management systems like NetEco.
NEW QUESTION # 42
The default port number for logging in to the NetEco is
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
In Huawei NetEco access design, the Web client is reached usingHTTPSto protect credentials and management data in transit. During initial deployment and commissioning, engineers access the NetEco login page by entering the server IP address followed by thedefault HTTPS service port. Huawei's standard login method specifies that users open a browser and enterhttps://NetEcoserver IP:31943to access the NetEco login interface. This port is therefore treated as the default Web login port in typical on-premises NetEco deployments, and it is the baseline value referenced in installation and login guidance. Other ports may appear in specific tools, customized scenarios, version variants, reverse-proxy deployments, or when security policy requires port changes, but those are exceptions driven by planning or product packaging. For exam and commissioning purposes, the correct default login port is the one used by the NetEco Web client entry point under the standard deployment model:31943.
NEW QUESTION # 43
ECO mode is not recommended when the load is less than
- A. 5%
- B. 10%
- C. 20%
- D. 30%
Answer: C
Explanation:
ECO mode is designed to improve UPS efficiency by supplying the load mainly through the static bypass path when the mains is within the acceptable quality window, while keeping the inverter synchronized and ready to take over quickly if power quality degrades. However, when the load istoo light, the overall operating characteristics of the UPS system are less favorable for ECO operation. At low load levels, the benefits of ECO in reducing conversion losses are smaller, and the system becomes more sensitive to frequent transfers caused by minor mains fluctuations, which can increase transfer##and operational risk. In addition, very light loads can reduce the effectiveness of system self-check behaviors and may lead to less stable operating margins for parallel systems, power modules, and downstream distribution, depending on site conditions.
Therefore, Huawei O&M guidance sets a practical threshold and states thatECO mode is not recommended when the load is lower than 20%, helping ensure stable operation, fewer unnecessary transfers, and better overall power supply reliability for critical loads.
NEW QUESTION # 44
Which of the following models is a Huawei in-room chilled water horizontal air supply product?
- A. FusionCol5000-A050H
- B. FusionCol8000-C210H
- C. NetCol5000-A070U
- D. NetCol8000-C070D
Answer: A
Explanation:
Huawei room-level air conditioning products are commonly identified by the series name plus a model suffix that indicates the cooling medium and airflow form factor. Anin-room chilled waterunit uses a chilled-water coil as the primary heat-exchange component and relies on the building's chilled-water system (chiller/plant) rather than an onboard refrigeration compressor for cooling generation. "Horizontal air supply" describes the discharge direction: the unit supplies conditioned air laterally into the room or into a specific airflow organization (such as cold-aisle delivery), supporting predictable airflow paths and stable return air conditions. Within the provided options,FusionCol5000-A050His the model that matches both identifiers: it belongs to Huawei's room cooling product line and the model code indicates an in-room configuration withchilled-watercapability andhorizontalair supply orientation. The other options belong to different series or represent configurations typically associated with other deployment forms (such as different placement, airflow direction, or system architecture). Therefore, the correct selection isFusionCol5000-A050H.
NEW QUESTION # 45
Operators can view parameters and set parameters on the "User Settings" and "Comm Settings" menus.
- A. True
- B. False
Answer: A
Explanation:
On Huawei data center cooling/monitoring controllers, menu permissions are typically organized so that routine O&M staff (operator role) can perform day-to-day adjustments that are required for normal running and integration, without accessing factory-only commissioning items. TheUser Settingsmenu is designed for operational configuration such as target temperature/humidity setpoints, control preferences, and other user- level parameters that need to be tuned to match the data hall environment and load changes. TheComm Settingsmenu is intended for communication configuration used in site integration, such as setting communication addresses, baud rates, protocol-related parameters, or enabling interfaces needed for upper- layer systems (for example, monitoring platforms). These settings are considered part of normal operation management and must be accessible so operators can maintain monitoring connectivity, replace controllers, or restore communication after changes. Higher-risk parameters (for example, factory calibration, protected control logic, or deep commissioning values) are normally restricted to higher privilege roles, but viewing and setting parameters withinUser SettingsandComm Settingsis an operator-allowed function.
NEW QUESTION # 46
Which of the following control modes can be used for temperature and humidity control of smart cooling products?
- A. Cold aisle
- B. Supply air
- C. Hot aisle
- D. Return air
Answer: A,B,D
Explanation:
Smart cooling temperature and humidity control is based on where the control "reference point" is measured and regulated.Supply air controluses the unit outlet sensor as the main reference, so the system directly regulates the temperature (and humidity when configured) of the air delivered to the IT area. This provides stable supply conditions and is widely used for predictable airflow organization.Return air controluses the unit inlet/return sensor as the reference, reflecting the heat absorbed from IT loads; it helps the unit respond to real load changes and maintain stable operation when room mixing or load distribution varies.Cold aisle controluses sensors placed in the cold aisle (near rack inlets) as the reference, aligning control with the most critical point for IT reliability-server intake conditions-especially in contained aisle scenarios.Hot aisleis generally not used as a primary temperature-and-humidity control mode because hot aisle conditions are intentionally high and variable (driven by load and containment), and controlling to hot aisle targets can conflict with ensuring stable rack inlet temperature and proper dehumidification behavior. Therefore, A, B, and C are valid control modes.
NEW QUESTION # 47
In alarm management, the status can be identified by masking rules.
- A. Standard
- B. Maintenance
- C. Invalid
- D. Valid
Answer: B,C
Explanation:
In Huawei alarm management,masking rulesare used to control how alarms are handled and displayed during specific conditions, such as planned maintenance, commissioning, device replacement, or known temporary abnormalities. When a masking rule is applied, the system can change how an alarm is classified so that O&M staff can distinguish between alarms that require immediate action and alarms that are expected or should be excluded from operational statistics. Two key statuses that masking rules can assign areMaintenanceandInvalid.Maintenanceindicates the alarm is generated during an approved maintenance activity (for example, power-off tests, sensor rewiring, cooling maintenance), so it is treated as expected and does not trigger normal escalation logic.Invalidindicates the alarm is not considered effective for operational follow-up-commonly used when a point is confirmed to be non-applicable, temporarily disabled, or its triggering condition is not meaningful to current operations. By contrast,ValidandStandardrepresent normal alarm handling states rather than outcomes specifically "identified by masking rules."
NEW QUESTION # 48
Which of the following are main components of Huawei indirect evaporative cooling system?
- A. Air filter
- B. Compressor
- C. Water pump
- D. Spray system
- E. Fan
- F. Heat exchanger
Answer: A,C,D,E,F
Explanation:
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.
NEW QUESTION # 49
The FusionCol8000-A230 unit uses two systems. Each system uses three compressors connected in parallel and two EEVs.
- A. False
- B. True
Answer: A
Explanation:
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.
NEW QUESTION # 50
Which of the following can be used to start the inverter of the UPS5000-H?
- A. NetEco
- B. ECC
- C. UPS WebUI
- D. UPS LCD
Answer: C,D
Explanation:
For the Huawei UPS5000-H, inverter startup is executed through theUPS's own control interfaces, which provide the "Running Control / Inv. ON" operation with the required confirmations and permissions. TheUPS LCD (MDU touchscreen)supports inverter startup through menu operations such as selecting inverter start functions and confirming the action after authentication. TheUPS WebUIalso provides the same operational control path, where an operator logs in and issues theInv. ONcommand 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) andNetEco(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 aUPS running control operationperformed on the UPS's LCD or WebUI control plane to ensure proper authorization, safety checks, and command traceability.
NEW QUESTION # 51
Which of the following is not a scenario-based solution for Huawei data center products?
- A. FusionModule500
- B. FusionModule2000
- C. FusionDC800
- D. FusionDC1000
Answer: C
Explanation:
Huawei's scenario-based data center facility portfolio is organized around clearly defined solution families that map to typical deployment scenarios and site sizes. FusionModule500 and FusionModule2000 are smart modular data center solutions designed for standardized, fast deployment in equipment rooms and enterprise edge/branch scenarios.They integrate key subsystems such as power supply and distribution, cooling, monitoring, and optional fire protection into a modular architecture that reduces footprint and accelerates on- site delivery. Likewise, FusionDC1000 is Huawei's prefabricated modular data center series, delivered as complete, factory-integrated modules that combine civil engineering elements with electromechanical infrastructure for rapid construction, predictable quality, and scalable expansion across different capacity tiers. In contrast, FusionDC800 is not used as a defined scenario-based solution name within Huawei's mainstream data center facility solution lineup (where "FusionDC" offerings are represented by the FusionDC1000 series and "FusionModule" offerings by numbered FusionModule solutions). Therefore, FusionDC800 is the option that does not match Huawei's scenario-based solution naming.
NEW QUESTION # 52
Which of the following are the user roles of Power Partner?
- A. Service manager of a rep office
- B. Project manager
- C. DOC
- D. Startup engineer
- E. Service engineer
- F. Inventory operations manager
Answer: A,B,C,D,E,F
Explanation:
Power Partner is Huawei Digital Power's partner service platform used to support delivery, commissioning, maintenance, and service operations across the full lifecycle of a project. To match real project workflows, the platform defines multiple user roles that align with different responsibilities and permission scopes. AStartup engineerfocuses on commissioning activities such as obtaining startup authorization, performing initial configuration, and completing functional verification. AService engineerhandles routine maintenance, inspections, troubleshooting, part replacement guidance, and closure of service cases. AProject managercoordinates delivery milestones, resource planning, and overall service execution to ensure acceptance criteria are met. AnInventory operations managermanages materials/parts flow, tracking, and availability to support timely repair and maintenance. TheDOC (Delivery/Dispatch Operations Center)role supports centralized operations such as work order dispatching, progress supervision, and process compliance.
Aservice manager of a representative officetypically oversees regional service quality, governance, and authorization control, ensuring the right people have the right access and that services are delivered according to Huawei process requirements.
NEW QUESTION # 53
What are the colors of indicators on the LCD panel of the MDU?
- A. Red
- B. Yellow
- C. Orange
- D. Green
Answer: A,B,D
Explanation:
On Huawei UPS systems (such as the UPS5000 series), the MDU LCD panel includes status indicators designed to provide an immediate visual understanding of the UPS operating condition and alarm severity.
The indicator system usesthree standard colors:green,yellow, andred.Greenindicates the UPS is operating normally and the power supply path is healthy.Yellowis used to show abnormal conditions that require attention, such as warnings or non-critical alarms, where the UPS can typically continue supplying power but O&M personnel should inspect and handle the issue within the required timeframe.Redindicates serious or critical conditions, such as major faults or alarms that may threaten continuous power supply or require urgent action according to operating procedures. These three colors align with the common Huawei alarm severity presentation logic on the UPS display and help technicians quickly judge whether the situation is normal, warning-level, or critical-level without entering deeper menus.Orangeis not used as an MDU indicator color in this context.
NEW QUESTION # 54
For hourly statistics reports, data of up to how many days can be queried? For monthly statistics reports, data of up to how many years can be queried?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
In Huawei NetEco statistical reporting, the query range is constrained by the report data retention policy and how summary data is stored. Forhourly statistics, the platform keeps a limited window of high-granularity data to balance storage consumption and performance. The hourly report retention is120 hours, which equals5 days. That is why hourly statistics queries are limited to5 days-beyond that window, hourly granularity is no longer retained in the report database for direct querying. For longer time horizons, NetEco relies on lower- granularity summaries (daily/weekly/monthly/yearly). Formonthly statistics, the platform supports long-term trend analysis and KPI tracking, and the maximum historical horizon aligns with the long-term statistics retention boundary used by NetEco reporting, which isup to 5 years. This design ensures fast query response, manageable database growth, and clear separation between short-term operational detail (hourly) and long- term management analysis (monthly/yearly).
NEW QUESTION # 55
After the battery module is installed, the torque and insulation should be checked according to the specified requirements.
- A. True
- B. False
Answer: A
Explanation:
This statement is true because post-installation verification is a mandatory acceptance step for battery systems in data centers. After a battery module is installed,torque verificationensures that all power terminals, interconnect bars, and grounding points meet the specified tightening requirements. If torque is too low, contact resistance increases, which can cause abnormal heating, voltage drop, nuisance alarms, and even connector damage during high current charge/discharge. If torque is too high, threads, lugs, or busbars can be damaged, creating hidden reliability risks.Insulation testingconfirms that the battery circuit has no unintended leakage paths to chassis or ground and that cable routing, connector seating, and protective covers are correct.
This is especially important for lithium battery cabinets where high DC voltage and large fault current capability demand strict electrical isolation. Performing torque and insulation checks after installation reduces early-life faults, improves safety, and ensures the cabinet can pass commissioning tests and enter stable service under UPS charge/discharge control.
NEW QUESTION # 56
Which of the following statements are true?
- A. When the UPS works in normal mode, you can directly turn on the maintenance bypass switch.
- B. When mains and bypass input of the UPSs share one power source, if mains outage occurs, the UPS cannot work in bypass mode.
- C. Huawei UPS5000-H is a modular UPS. If a module fails, it can be replaced online.
- D. When the UPS works in static bypass mode, if the mains input outage occurs suddenly, the UPS automatically switches to battery mode.
Answer: B,C,D
Explanation:
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.
NEW QUESTION # 57
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