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Problem for APC Back-UPS Pro 650 UPS System
Any schematics available for a APC Back-UPS Pro
Solution #1
posted on Nov 12, 2009
hi, i don't have the schematic but, i think if you connected the batteries okay and had switched off the machine then it should work. when switching on there are two sounds that come, first its a beep, if you release the ON SWITCH the UPS will just do a self test then shutdown. to switch ON the UPS completely don't release the on button until you hear a second beep, if you release the ON switch when this beep is on, then the UPS will be ON completely.
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