A termination voltage is a voltage that either indicates the charger should stop a phase or stop all charging. When batteries begin to wear out some or all of the cells can overheat when the charger attempts to bring them up to a termination voltage but cannot reach it efficiently, and thus heat (sometimes a lot) can be generated.
This is my first take on the problem. One should check if the battery is actually hot when the message says it is. If it's not then the problem is with the sensor or the software.
SOURCE: desk top APC UPS ES750 not communicating
Here is an answer I got from APC when one of my client got the same problem as you did:
The error message would pop up if the link between the computer and the UPS is weak. I cannot rule out a problem with the cable or the UPS. In order to confirm the same please try the following steps which might help :
1) Ensure that the USB cable is properly connected to the USB port of the computer.
2) If the PC was powered on before the UPS, communication will not be achieved until you disconnect and reconnect the USB cable to the host. In this case, you need to disconnect and reconnect the USB cable to establish communication.
3) Some other software is polling your USB port for another device, thus causing the UPS software to temporarily lose communication with your UPS. If this is the case, you would need to shut down that application.
4) If you have any other USB devices connected to the PC, disconnect them and then try plugging in the cable.
If the issue persists, please visit the following link which lists few troubleshooting steps :
http://nam-en.apc.com/cgi-bin/nam_en.cfg/php/enduser/std_adp.php?p_sid=oXhRFGEh&p_lva=&p_faqid=2923
SOURCE: APC BR800 Overload light with beeps
Your main control board is defective, you need a new unit.
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: APC Back-UPS ES 500: green light flashes&continuous warning tone
On this unit, the likely culprit is the battery and that it needs to be replaced.
With that, you may want to think about the pros and cons of replacement versus buying an entirely new unit.
This unit is a relatively low end ups and the surge supression uses MOVs that wear out with repeated absorption of energetic spikes. That's why the better (and higher cost) UPSs and surge suppressors don't use them. They're not really that good anyway due to their relatively high transient impedance. The better equipment uses a "transorb" -- basically a back-to-back high voltage zener diode optimized for low breakover impedance and high instantaneous power capability. Unless the transient exceeds the design parameters of the circuit, these do not wear out and do not degrade. That being said, I will assume that you would likely replace this unit with a similar one.
The flashing may not be the battery at all and may be the charging circuitry, thus your new battery may not live very long (half the life that you would expect.
Many batteries out there are refurbs and have issues as all used parts do.
If you contact APC, they will likely give you a 35% discount on purchasing a new product.
The difference in price in the battery replacement vs. ups replacement at this level may only be a few dollars more.
I promise that I am not a UPS salesman, I just deal with many on a daily basis; therefore I am giving my two cents to try to thelp you avoid problems a year from now.
Testimonial: "Outstanding answer with right amount of detail. I swapped battery with identical APC UPS that I have and vfd that battery was cause of warning tone."
SOURCE: APC Back UPS RS-1000 Overload LED with beeping sound after on.
in the end solution is you have to bring it nearest apc service.
if you loaded more than its max. capacity at past, the sensor of power is geting burn the sequare wave generator IC.
so you need help with that, olso complicated.
I live the same position with my rs1000, horrible :((
8.3 Battery Configurations
There are different configurations for different battery types and backup time. Here, the batteries from VISION and
YUASA are selected. The backup times ranges from 1hours to 4hours for 20KVA UPS and from 1hours to 2hours
for 30KVA UPS, because of limitation of CLA power rating.
UPS Backup
time Number of blocks Type of blocks Capacity(10H)
1h 1×24 6FM55SGX 52Ah
10kVA 2h 2×24 6FM45X 2×42Ah
4h 2×25 6FM75X 2×74.5Ah
1h 24 6FM75X 74.5Ah
15kVA 2h 3×24 6FM45X 3×42Ah
4h 3×25 6FM75X 3×74.5Ah
1h 1×25 6FM90X 90Ah
20kVA 2h 3×25 6FM55X 3×52Ah
4h 2×26 6FM150X 2×144h
1h 2×25 6FM75X 2×74.5Ah
30kVA
2h 3×24 6FM100X 3×96Ah
Sheet. 4 the battery configuration with VISION battery
UPS Backup time Number of
blocks Type of blocks Capacity
(10H)
1h 2X24 NPL24-12 2X24AH
10kVA 2h 2×26 NPL38-12 2×35.3AH
4h 2×26 NPL65-12 2×60.5Ah
1h 1×27 NPL65-12 60.5Ah
15kVA 2h 2×24 NPL65-12 2×60.5Ah
4h 3×26 NPL65-12 3×60.5Ah
1h 1×27 NPL100-12 92Ah
20kVA 2h 2×24 NPL100-12 2×92Ah
4h 4×26 NPL65-12 4×60.5h
1h 3X24 NPL65-12 3×60.5Ah
30kVA
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