APC-SUA2200RMUS Battery not connected error

pctechtv_apc · ‎2021-07-09

I setup a APC-SUA2200RMUS today. When I turn it on I have a battery error. When I trace the error in the manual, it states that the battery is not connected. I am wondering if one battery in its series of 8 is bad could that cause this error. The unit was supposed to be new. I see aftermarket batteries that are not labeled ACP. I double checked the connector to the battery pack. Then to continue troubleshooting slid out the pack containing the series of batteries. Everything seems to be connected fine. I want to begin troubleshooting this problem. Is it possible that only one of batteries being bad could cause this error? The problem I am receiving is exactly the same when I just disconnect the front battery connector. It gives the exact same error because the hole pack is not connected. This is making me think there could be a short somewhere or just one of the batteries is bad. When a UPS has batteries in a series, can you just by-pass one that could be bad. For example I mean just use 7 instead of the 8 that make up the pack. Are there any guides to help with wiring? I am going to further test to see if I can get to the bottom of this. Any help advice will be helpful. Thanks

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pctechtv_apc · ‎2021-07-09

After reading some things on line I started trouble shooting the problem. I saw a video that seem to be showing a unit similar to mine and it stated that the unit should give off between 48 – 52 volts. I removed the pack and noticed the two series circuits. They were 4 batteries each. I was not getting 48 volts because some of the batteries are only outputting 11 or so volts. I tried just the batteries that were above 12 volts and setup one circuit that I tested for 48 volts. The unit came on and works without the battery warning. I plan to try to replace the missing 4 batteries when I can get what I need. The question I have now is there any problem with using the unit with half the batteries? I imagine it will only keep a power outage backed up for about half the time or less? Are there any other problems with doing this? Thanks

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pctechtv_apc · ‎2021-07-09

After reading some things on line I started trouble shooting the problem. I saw a video that seem to be showing a unit similar to mine and it stated that the unit should give off between 48 – 52 volts. I removed the pack and noticed the two series circuits. They were 4 batteries each. I was not getting 48 volts because some of the batteries are only outputting 11 or so volts. I tried just the batteries that were above 12 volts and setup one circuit that I tested for 48 volts. The unit came on and works without the battery warning. I plan to try to replace the missing 4 batteries when I can get what I need. The question I have now is there any problem with using the unit with half the batteries? I imagine it will only keep a power outage backed up for about half the time or less? Are there any other problems with doing this? Thanks