This question was originally posted by sawangpong on APC forums on 2/17/2016
We has bought the UPS with 17 units of extended XR battery frames.
Unfortunately, 4 out of 17 units had the error E7. So, we have changed the communication cards of this 4 units.
The fault E7 has been solved but another code comes, E6.
Could you please suggest what is the cause of E6 and how to solve?
Also, is there any effect on the operation if we don't solve this problem.
Last but not least, it would be highly appreciate if you could share with us the definition of fault code E1....E7 or even more.
Thanks a lot.
This reply was originally posted by David on APC forums on 2/17/2016
Which UPS are we speaking about? Is this a Symmetra RM or a Symmetra LX? How many XR frames have you attached to one UPS? It is odd to get an E7 on so many new cards. The E7 could mean a number of different issues including: The XR COM card itself, the communication cable, or an incorrectly set dial on the COM card. The E6 that you are reading is actually an Eb most likely. This is a fault with the card itself and it would need to be replaced. This fault could be generated by any number of items. Such as a damaged component on the card.
This was originally posted on APC forums on 2/18/2016
I'm just another user, so I'd suggest going with the APC answer if it conflicts with mine.
I'm assuming you purchased this hardware used (as otherwise you should just tell the seller to take it back and send you some working equipment). Here are some things to try...
As to whether the UPS will run with the errors, it will. The calculated runtime will be incorrect, as the UPS computes that based on the size of the load and number of batteries. Anything that makes the UPS think that there are fewer batteries will cause it to report a shorter runtime. If you are getting repeated alerts about battery removed / battery inserted, you can disconnect the communication cable(s) from the frame(s). Leave the big DC power bus cables connected. Battery charging may not achieve 100% if there are batteries that the UPS doesn't "know about" connected - one of the things that the communication cable reports is the state of charge of the battery packs. If the communication cable isn't connected to some XR frames, the UPS makes its charging decisions based on the battery status from the battery packs it can "see" communications from, and the voltage on the battery bus (which is constant across all of the frames). So you may see the UPS sitting at 99% charge instead of 100%, or something like that.
This reply was originally posted by sawangpong on APC forums on 2/18/2016
Thanks a lot for your reply. I will check for that first.
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