Description of the problem

The OSN7500 equipment in the server room of the current network was powered down and reset when the utility power was restored to switch to utility power supply more than an hour after the utility power was dropped, and no other equipment showed any abnormality.

Processing

None

root cause

In the failure to appear before the city has had a power-down, and the failure just out of the utility power restored to switch to the utility power supply, focusing on the suspicion that the power supply there is anomalies, the possibility of equipment failure is small. So apply for utility power-down test, the actual test, found that all disconnected from the utility power supply, battery power supply current drops rapidly, all equipment in the room powered down, restore utility power, all equipment normal power work.

So check the battery, found that the battery production date is August 2006, has been used for nearly 6 years, serious aging, in the utility power failure has not been able to play the role of power reserve. The battery can still support a break of time during the failure, but the power supply capacity has been obviously insufficient, in the process of switching back to utility power but not yet completed the switch, the battery can not support the power supply of the equipment and fluctuations, resulting in the most power-consuming equipment in the server room, that is, the OSN7500 will be the first to be affected by the abnormal power loss.

Solution

Replace the battery.

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