Just replaced batteries on my APC Back-UPS Pro 1400. The old ones were buldged. Now the new ones are charging at 27.5 volts. That seems a little high?
No, that right. The batteries are wires in series so the voltage is 24v and they need a little high input than that to charge correctly.
SOURCE: SMART UPS APC 3000
let the ups be turned on just charging the batteries, u can have the voltage but the batteries still not fully charged. good luck
SOURCE: APC Smart UPS 1500 will not start.
It could be that the cable to the front-panel got damaged during the battery replacement. After all these years you would think APC would improve that aspect of their design. All I can suggest is inspecting the cable and where it connects to the front panel.
SOURCE: Overload light in APC RS 800 UPS
it seems that the inverter circuit of your UPS is dying. the solution here is you have to open up the UPS and check the inverter circuit. to make easier, check the power mosfet if its leaking.
SOURCE: Any schematics available for a APC Back-UPS Pro
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.
http://www.refurbups.com/APC-RBC7-Compatible
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