Which of the following statements are true about the routine maintenance of a UPS?
A.
Environment check: Check whether the temperature and humidity of the equipment room meet the recommended environment requirements. Check whether the equipment room is clean and tidy.
B.
UPS status check: Check whether the UPS works in normal mode, whether an alarm is generated, and whether the UPS is in a proper load.
C.
Routine maintenance of vulnerable components: Periodically check the UPS fan operation, whether there is noise, and whether the rotation speed is abnormal.
D.
If there is no alarm on the UPS panel, do not need to check the installation environment, temperature, and humidity onsite.
The Answer Is:
A, B, C
This question includes an explanation.
Explanation:
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.
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