H20-923_V1.0 HCSP-Field-Data Center Facility V1.0 Questions and Answers

For FusionCol8000-C chilled-water systems, Huawei commissioning requires awater leakage/pressure-holding teston the chilled-water piping after installation to verify joint sealing, valve interfaces, and connection integrity before long-term operation. The specified method is toraise the water pressure in the chilled-water pipe to 0.8 MPa, then observe for30 minutesto confirm there is no visible leakage. If the system remains dry, the same pressure isretained for 24 hoursas a stability verification step. The acceptance criterion is that thepressure drop is less than 0.01 MPaover the 24-hour period and no leakage is found, which demonstrates that the piping and fittings meet tightness requirements under the prescribed test pressure. This procedure helps prevent future failures such as slow seepage, corrosion around joints, insulation waterlogging, and unexpected shutdowns caused by water loss or low differential pressure alarms. It also ensures that subsequent flushing, venting, and operational commissioning can be performed safely and reliably.

In Huawei data center power distribution design, theSPD (Surge Protective Device)provides overvoltage surge protection for sensitive loads by diverting transient energy to ground through internal protection components. The SPD status indicator is used for O&M judgment of protection availability. When the indicator isgreen, it indicates the SPD protection components arewithin normal working conditionand the surge protection path remains effective. When the indicator turnsred, it typically means the SPD’s internal protection element hasdegraded or disconnected(end-of-life or failure after cumulative surges), and the device can no longer provide the rated protection level. In this condition, the distribution system is left exposed to surge risk, especially during thunderstorms, switching operations, or upstream disturbances. Therefore, Huawei O&M practice treats ared SPD indicator as a replacement trigger, requiring immediate corrective action: confirm alarm/status, ensure safe isolation following electrical safety procedures, and replace the SPD module to restore protection and maintain power system reliability.

In Huawei precision cooling commissioning, the wizard groups functional commissioning items so technicians can validate key subsystems efficiently. Thecooling system commissioningis mandatory because it verifies the primary control and protection loop that directly determines whether the unit can safely provide cooling capacity. This includes confirming the refrigeration or chilled-water cooling path can start and stop correctly, sensors and control logic are valid, and protection conditions (such as abnormal pressures/temperatures, flow conditions, or interlocks) behave as expected. Without completing cooling-system commissioning, the unit’s core purpose—stable temperature control for IT loads—cannot be assured, and the controller cannot reliably judge normal versus fault states during operation.

Other items (indoor fans, condensate pump, humidifier) are important butscenario-dependent: some sites do not use humidification, some drainage designs do not require an internal condensate pump, and fan checks can be handled as part of broader functional tests or may vary by redundancy configuration. Therefore, the wizard allows non-mandatory items to be deselected, but the cooling system commissioning must remain selected to complete a valid baseline commissioning workflow.

For the Huawei UPS5000-H (380/400/415 V class), “upstream input voltage range” refers to the acceptableAC mains (rectifier) line-to-line input voltage windowthat the UPS can tolerate while maintaining operation. Huawei specifies a wide mains input voltage range of138–485 Vac (line voltage)to improve adaptability to weak or fluctuating power grids and to reduce unnecessary battery usage when the utility voltage sags or rises within allowable limits. Within this overall window, the UPS may applyderating rulesat lower voltages (for example, full-load operation is typically guaranteed only above a higher threshold), but the upstream input can still remain connected and the UPS continues supplying the load according to its control strategy and available capacity. The other options do not match the upstream AC input range:360–600 Vis commonly associated withbattery DC voltage ranges,220–240 Vis single-phase class, and380–415 Vrepresentsrated voltage, not the full acceptable upstream range.

In data center power systems, the utility grid frequency standard iseither 50 Hz or 60 Hz, depending on the country/region. Data center facility equipment—such as UPS systems, power distribution units, switchgear, and monitoring components—is designed to operate reliably under these standardized grid frequencies, with acceptable tolerance ranges around the nominal value. While some power conversion equipment can adapt between50/60 Hz(for example, via frequency tracking or double-conversion),70 Hz is not a standard utility frequencyused for data center facility power supply, and it is not treated as a normal operating frequency in typical design, acceptance testing, or O&M procedures. From an operations perspective, maintaining correct frequency is critical because abnormal frequency can trigger UPS transfer logic, increase losses, create synchronization issues with bypass sources, and negatively affect downstream IT loads. Therefore, stating that power supply equipment frequency “can be 50 Hz, 60 Hz, or 70 Hz” is incorrect for standard data center infrastructure practice.

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.

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.

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.

In Huawei room air conditioner and precision cooling unit O&M, fan replacement is treated as a maintenance activity that must be recorded in the controller so lifecycle management remains accurate. The controller tracksaccumulated runtimefor wear components such as indoor fans to support preventive maintenance planning, alarm thresholds, and performance analysis. After a fan is replaced, the old runtime value must be cleared so the system can correctly measure the new fan’s service hours, avoiding premature “maintenance due” prompts or misleading reliability assessments. This function belongs to themaintenancefunction set rather than alarm viewing, parameter settings, or basic running status. Therefore, the correct navigation is throughMenu > Maint > Performance Maintenance, where the technician can locate the indoor fan runtime item and reset/clear it after confirming the replacement. Performing this step ensures consistent O&M records, supports correct maintenance intervals, and helps troubleshooting by aligning future fan-related alarms with the actual operating hours of the newly installed component.

In UPS5000-H operation,normal modemeans the load is supplied by theinverter, and the rectifier/charger maintains the DC link and batteries. Themaintenance bypass switch(maintenance bypass breaker) is a mechanical isolation path intended to keep the load powered while the UPS is taken out of service for inspection or repair. Because it changes the power path and can create unsafe or unintended parallel paths if operated incorrectly, it isnot permitted to simply close the maintenance bypass switch while the UPS is in normal mode. The correct O&M logic is to perform acontrolled transferfirst (typically transferring the load tostatic bypasswith proper synchronization and confirmation that bypass power is healthy), and only then close the maintenance bypass switch so the UPS can be safely isolated. This prevents disturbance to the load, avoids synchronization/transfer hazards, and protects personnel from incorrect switching operations. Therefore, the statement is true in the sense of standard UPS5000-H operating procedure and safety interlock intent.

Huawei UPS5000-H is a modular UPS platform built by paralleling standardized power modules inside the power cabinet to form different system capacities. In this architecture, the “single power module” is the basic building block that contributes a fixed rated apparent power to the total UPS capacity. For the UPS5000-H series, each power module is rated at100 kVA, and the system capacity is achieved by installing multiple 100 kVA modules and configuring redundancy (such as N+1). This modular approach improves availability and O&M efficiency because a failed module can be isolated and replaced without shutting down the entire UPS, while the remaining modules continue carrying the load within their capacity limits. Using 100 kVA as the module rating also simplifies planning: technicians can quickly estimate remaining headroom by counting active modules and comparing total available kVA/kW against the real-time load, ensuring the UPS stays within recommended loading and redundancy margins during maintenance or fault conditions.

NetEco is an enterprise management application with specific runtime dependencies, including supported operating system versions, database/middleware compatibility, CPU/memory/storage requirements, and network/security prerequisites. Because of these dependencies, Huawei does not treat NetEco as “hypervisor-agnostic for any virtualization platform.” In practice, NetEco deployment in virtualized environments is supported only when the virtualization stack meets Huawei’s compatibility requirements, such as validated hypervisors/virtualization solutions, proper virtual hardware settings, and resource reservation rules to ensure stable performance (especially for alarm processing, historical data storage, and northbound integration tasks). If deployed on an unverified virtualization platform, issues may occur such as clock drift, I/O latency, database performance bottlenecks, unstable NIC behavior, or unsupported VM device models, which can impact data collection, event correlation, and overall system stability. Therefore, the correct interpretation is that NetEco can be deployed onsupported/verifiedvirtualization platforms, not onanyvirtualization platform.

Routine UPS maintenance is preventive by design, so it must cover bothenvironmental conditionsandequipment operating status, not only alarms. The equipment room environment directly affects UPS reliability: high temperature accelerates capacitor aging, reduces battery/rectifier reliability, and may trigger derating; improper humidity increases the risk of condensation or electrostatic discharge; dust and poor housekeeping raise the risk of blocked airflow and overheating. Therefore, theenvironment checkin option A is a standard routine item. Option B is also essential because O&M personnel must confirm the UPS is innormal operating mode, verify no hidden alarms exist in the event log, and ensure the load level is within the recommended range to maintain redundancy and efficiency. Option C is true because fans are typical “wear-out” components; abnormal noise or speed changes often appear before a failure and can be detected early through inspection. Option D is false: absence of a front-panel alarm never replaces onsite environmental inspection and basic preventive checks.

This statement is incorrect because it combines two different frame configurations into one description. In the UPS5000-H family,cabinet composition depends on capacity. For theUPS5000-H-1200 kVA, the user manual’s exterior description shows asingle power cabinet plus a bypass cabinet, together with theMDU. In other words, 1200 kVA is not described as “two power cabinets + one bypass cabinet” in its standard cabinet topology. By contrast, theUPS5000-H-1600 kVAis a wider frame and its maintenance/structure description explicitly showsPower cabinet 1, Power cabinet 2, and a bypass cabinet, and the product documentation also includes component sections for items like thesurge protection boxandMDU. Because the 1200 kVA model does not match the “two power cabinets” description, the combined statement (covering both 1200 kVA and 1600 kVA) isfalse, even though the “two power cabinets + one bypass cabinet” part is valid for 1600 kVA.

Wizard startup commissioning is designed to verify that the unit’skey controllable subsystemscan be started, regulated, and protected correctly. Conditions that prevent a subsystem from operating normally will directly cause commissioning failure. If thecondensate pump is stuck, the drainage function cannot be validated and water may accumulate in the drain pan, which is treated as a functional fault during commissioning. Ifindoor fan 2 drive is faulty, the fan system cannot meet airflow requirements or redundancy expectations, so the fan commissioning item fails. If theelectronic expansion valve (EEV) is not opened, refrigerant flow and cooling control cannot be established, so the cooling system commissioning fails because the unit cannot build a stable refrigeration cycle or reach expected operating parameters.

In contrast, thewater leakage ropeis aprotective detection accessoryused for leak sensing and alarming. While it is important for site safety and recommended for operation, its absence typically does not block the unit from completing the functional commissioning steps for fans, cooling, and drainage; it mainly affects leak detection coverage and related alarms rather than the basic startup commissioning pass/fail.