Hello to everyone,
I have a br 1500 apc ups,the tall and thin one and suddenly came up with the overload light permanently lit and buzzing.The problem was the 2 fets on inverter which I replaced and worked.After I tested with no load,running on batteries and with powerchute on pc to observe all seems ok until I plug in the ac.Then the overload problem stands up again...After inspection the AVR transformer was really hot.I try the unit without it and it works!When I plug it again the surge breaker on the back went off and never worked again..I tried it with a 10A automatic fuse and...
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