The cooling fan is probably not working. Unit will overheat. Check the fan to see if it run continuously with no scraping noise with the UPS turned "ON". If the fan does not run, open the case and replace the fan.
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The cooling fan is probably not working. Unit will overheat. Check the fan to see if it run continuously with no scraping noise with the UPS turned "ON". If the fan does not run, open the case and replace the fan.