Check the UPS working conditions, including the ambient temperature, humidity, input
and output voltages, frequency, load power, load ratio, and alarm information.
Check the UPS for abnormal sounds. If there are abnormal sounds, check the fan, input
and output transformers (if there are), power unit, and bypass unit. If the abnormal
sounds persist, contact Huawei technical support.
Check that the input and output terminals are connected securely and that cables are
intact. If cables are damaged, identify the cause and take appropriate measures, such as
rat prevention measures.
Check that all units are operating properly by observing the status icons on the LCD, all
operating parameters are within their normal ranges, and no fault or alarm information is
displayed.
Clean devices.
Observe and record load power changes regularly.
Check and record the UPS ambient temperature and humidity.
Check that parameters are set correctly.
Fill in the UPS maintenance report, and rectify exceptions and alarms based on their
severities.
Export alarm information, and provide an alarm analysis report.