i have a Smart UPS RT 6000, that stop working, i noticed that batteries are dead, when replaced, give me red fault led, short beep, fan get on and 1st battery LED on like:
searching on the forum i found almost all battery led codes discussed over here, except my case
since i post my doubt 13 day ago about the APC fault battery led code, and i remained unaswered , i found yesterday, in another source, the service manual that contains ALL led fault codes , concluding that 10000 means OVERTEMPERATURE, but wait... the nobreak dont even starts!? why this is telling me overtemperature fault? folowing the wiring of temperature sensor`s, i found a bad LM339 (IC25 on the logic board) replaced and that stop complaining overtemp.
after that, i got 00001 fault led code, that means INVERTER FAULT. the manual says to check Q705, Q706, Q715, Q716 Q717, Q718, D750 and D751, checked and founf all good. since that i started to suspect about logic board, but at the same time it doent make sense, because it indicates an "feel" de fault on the board, so, logic ok, power transistors and diodes ok, may something on the midway, and Found coil T710 open. replaced it and all started work properly.
so if you got 00001 code, check inverters transistors listed above, and the 4 BLACK square coils close to transistor
i hope this help someone with problems like mine.
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