One of my UPS's at a house/tower was chirping, I sent a technician to 
pull the unit in for testing.  It was so hot that they had to wrap it in 
towels to move it, it wasn't chirping when he got there.  It has a 
minimum load of about 3-4 amps for a couple Mikrotik and Motorola radios 
on it with a switch and remote reboot unit.  The UPS was in an attic of 
the house and it is averaging about 95 degrees (we don't have humidity 
here) outside so I figure over 100 in the attic.  I'll let it cool down 
overnight in the office but my guess is the chirping was a high temp 
warning, any ideas?

SmartAPC Model SUA 750 - about a year old.

Forbes


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