Uninterruptible Power Supply (UPS) maker American Power Conversion (APC) has recalled some of its Back-UPS CS systems after half a dozen of them melted. The recall potentially affects 2.1 million units sold worldwide — about 900,000 of those are being used in the United States.
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Specifically, two models have been recalled: the Back-UPS CS 350 and the Back-UPS CS 500, both in 120 and 230 volt capacities. Both models were made between November, 2000 and December, 2002. If you have one of these units, check the serial numbers. Units affected by the recall include those with the following serial number ranges:
If the serial number ends in “R,” it’s not part of the recall, according to APC. Users whose power supplies have been recalled are encouraged to call 866.272.7359.
According to APC, the problem causing this recall results in the outer case of the UPS to melt. No one has been hurt by the problem, although it has caused minor property damage in three recorded incidents.