Please copy this table for recording.
4.3.3 UPS power distribution system maintenance
1. Fan maintenance
Under continuous operation, the expected running time of the UPS fan is 20,000 hours to 40000 hours. The higher
the ambient temperature is, the shorter the fan life becomes.
During UPS operation, all fans should be checked periodically every six months to confirm that there is wind blowing
out from the vents on the rear panel of the UPS.
2. Check UPS status
Clean the UPS regularly, especially the vents, to ensure that airflow is freely circulated inside the enclosure and, if
necessary, cleaned with a vacuum cleaner. Confirm that there are no objects obstructing UPS ventilation. It is
recommended to check the running status of the UPS every six months.
The inspection contents include:
1) Check the UPS for faults. Check if the fault indicator is on, and if there is a fault alarm.
2) Check if the UPS is working on the bypass. Under normal circumstances, the UPS should operate in normal mode;
if the UPS is operating in bypass mode, the cause should be confirmed, such as: human action, overload, internal
fault, etc.
3) Check if the battery is in a discharged state. Under normal conditions, the battery should not be discharged. If the
UPS is running in battery mode, you need to confirm the cause, such as: power failure, battery test, human action,
etc.
4.4 Alarm reference
Table 4-4 Normal alarm reference
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