Question about Powercom (BNT-1500AP) UPS System

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My ups shuts down after ac power goes off - Powercom (BNT-1500AP) UPS System

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1. Open the UPS housing using a screwdriver.
2. Check the fuse. If is busted, have it replaced.
3. If the fuse is alright, check the battery terminal
for the stored voltage. It must be at least + or -
10% of the rated voltage of the battery. The rated
voltage is located at the battery. (12 volts). If the
voltage is below, 8 volts or only 30% of the rated
voltage. It must be replaced.
4. If the battery

Posted on Sep 25, 2009

  • rolando ingking Sep 25, 2009

    4. If the battery is Okey, plug the UPS to the electrical outlet, and read the voltage at the battery terminals with the power on. This must be higher than the battery rated voltage to charge the battery
    of your UPS. If the voltage is the same, as that of the battery when it was not yet turned on. Then,
    you have a defective trickle charging IC.
    5. If the trickle charging IC is defective., your option is to buy a new unit or have the IC replaced.
    Note: To take the voltage reading, use the multi tester, set it at DC volts - 25v.
    You may take the AC voltage reading coming from the power outlet, set it at AC volts - 250v
    To have a continuity test, set the multitester at R x 1 Ohms.
    6. Send an e-mail to me if you get it working, thru fix ya.

  • Akoni M. Mar 22, 2013

    I tried your suggestion above because my ups turns off also after ac power fails, I measured the battery when the ups is off and it is 10V DC,when i plug the ac power i measured again the battery using tester and it reads 13V DC, what might be the problem of the ups

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It is supposed to stay UP beeping for a couple of minutes before going down. When it abruptly turns OFF when AC power is cut off, then your UPS battery is dead not holding charge anymore

Posted on Sep 25, 2009

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