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follow this steps and fix it. God bless you
Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
2
Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.
3
Determine if the battery backup is charged and providing battery power. With the battery backup on and plugged into a working electrical outlet, plug a computer monitor into one of the battery backup outlets labeled "battery backup plus surge protection" on the battery backup. (APC power supplies have some outlets that provide only surge protection while the other outlets provide surge protection plus battery backup.) Turn the monitor on. Unplug the battery backup power cord from the wall outlet. If the monitor remains on, the battery is holding a charge, supplying electrical power and the battery backup is working properly. If the monitor goes off, proceed to step four.
4
Charge the battery. Plug the battery backup into an electrical outlet and allow the battery to charge for 16 hours. This will fully charge the battery.
5
Test battery charge. Once the battery is fully charged, repeat step three. If the monitor stays on when power is interrupted to the battery backup, the issue is solved and the problem resulted from an incompletely charged battery. If the monitor turns off when power is interrupted, the battery within the battery backup is faulty and needs to be replaced.
6
Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
On this issue i suggest you to get the battery and its connections checked. Either battery is got weak or the problem is related to loose battery connections.Some times battery connectors gets dirty and cause no connection issue.So disconnect battery terminals,clean them and reconnect and check ,if that is helping. Also if the battery is got very old,then try with new battery.
For more detailed help,related to these issue,i suggest you to click the help links provided below:-----
Remove the battery box compartment cover. Disconnect the positive and negative battery leads. Undo the battery holding down clamp screws and remove the battery clamp, now you can lift out the battery. Place the new battery in the battery box and secure the battery hold down clamp. Connect the battery leads to the battery, the red lead to the battery's positive terminal and the black negative lead to the battery'e negative terminal, then replace the battery box cover.
It depends on how you connect the batteries. If you connect the negative of battery one to the positive of battery 2, the negative of battery 2 to the positive of battery 3 the negative of battery 3 to the positive of battery 4 then the positive of battery 1 and the negative of battery 4 will give you 48v 7AH. (This is known as connecting in series.)
If you connect the four positives together. Connect the 4 negatives together it will give you 12v 28 AH. (This is known as parallel connection.)
If you connect the negative of battery 1 to the positive of battery 2. Connect the negative of battery 3 to the positive of battery 4. Connect the positive of battery 1 to the positive of battery 3 and the negative of battery 2 to the negative of battery 4. You'll get 24v 14AH from the connection of the positive of battery 1 and battery 3, and the negative of battery 2 to battery 4. (This is known as series parallel connection)
It depends on how you connect the batteries. If you connect the
negative of battery one to the positive of battery 2, the negative of
battery 2 to the positive of battery 3 the negative of battery 3 to the
positive of battery 4 then the positive of battery 1 and the negative of
battery 4 will give you 48v 7AH. (This is known as connecting in
series.)
If you connect the four positives together. Connect the 4
negatives together it will give you 12v 28 AH. (This is known as
parallel connection.)
If you connect the negative of battery 1 to
the positive of battery 2. Connect the negative of battery 3 to the
positive of battery 4. Connect the positive of battery 1 to the
positive of battery 3 and the negative of battery 2 to the negative of
battery 4. You'll get 24v 14AH from the connection of the positive of
battery 1 and battery 3, and the negative of battery 2 to battery 4.
(This is known as series parallel connection)
Attributes
Battery BCI # : 75 Battery CA @ 32 Degrees F : 775 Battery CCA @ 0 Degrees F : 630 Battery Height : 7 1/4" Battery Length : 9 3/4" Battery Posts Type : Side Post Battery Reserve Capacity : 90 Battery Voltage : 12 volt Battery Weight : 33 lbs. Battery Width : 7" Wet or Dry : Wet
A lead acid battery with the fallowing specs
group 75
Attributes
Battery BCI # : 75 Battery CA @ 32 Degrees F : 775 Battery CCA @ 0 Degrees F : 630 Battery Height : 7 1/4" Battery Length : 9 3/4" Battery Posts Type : Side Post Battery Reserve Capacity : 90 Battery Voltage : 12 volt Battery Weight : 33 lbs. Battery Width : 7" Wet or Dry : Wet
Attributes
Battery BCI # : 75 Battery CA @ 32 Degrees F : 775 Battery CCA @ 0 Degrees F : 630 Battery Height : 7 1/4" Battery Length : 9 3/4" Battery Posts Type : Side Post Battery Reserve Capacity : 90 Battery Voltage : 12 volt Battery Weight : 33 lbs. Battery Width : 7" Wet or Dry : Wet Battery BCI # : 75 Battery CA @ 32 Degrees F : 775 Battery CCA @ 0 Degrees F : 630 Battery Height : 7 1/4" Battery Length : 9 3/4" Battery Posts Type : Side Post Battery Reserve Capacity : 90 Battery Voltage : 12 volt Battery Weight : 33 lbs. Battery Width : 7" Wet or Dry : Wet
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