Question about Powercom VGD-1000 (VGD-1000) UPS System
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Posted on Jan 02, 2017
It sounds to me like you have a shorted cell in one of the batteries and the current limiting resistor on the charging side is out of tolerance (too low). Though it is more likely that they fail too high, they can go low in the event of overheating. I would check the resister with an ohm meter vs what is printed on it. It should usually be within 10 to 20% you can put one in series to limit the current, but you need a high current diode in parallel with it as no to limit the current to the inverter. I don't remember, but i think your model uses 2 12vdc batteries. You should replace all of its batteries and check the resister. Also, if there was a plastic insulator on the old mosfets you took off, you must have it on the new ones. this is to isolate the collector from ground. I home this helps,
Posted on Apr 19, 2009
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