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NEW QUESTION # 28
After replacing the fan, choose "Menu > _____ > Performance Maintenance" on the main screen to enter the
"Performance Maintenance" screen and clear the accumulated runtime of the indoor fan.
Answer: B
Explanation:
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.
NEW QUESTION # 29
Which of the following is not a scenario-based solution for Huawei data center products?
Answer: B
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 # 30
The frequency of power supply equipment can be 50 Hz, 60 Hz, or 70 Hz.
Answer: B
Explanation:
In data center power systems, the utility grid frequency standard is either 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 between 50/60 Hz (for example, via frequency tracking or double-conversion), 70 Hz is not a standard utility frequency used 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.
NEW QUESTION # 31
Which of the following control modes can be used for temperature and humidity control of smart cooling products?
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 # 32
After replacing the fan, choose "Menu > _____ > Performance Maintenance" on the main screen to enter the "Performance Maintenance" screen and clear the accumulated runtime of the indoor fan.
Answer: B
Explanation:
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 tracks accumulated runtime for 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 the maintenance function set rather than alarm viewing, parameter settings, or basic running status. Therefore, the correct navigation is through Menu > 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.
NEW QUESTION # 33
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