A21 alarm on 522 pump
I've just gotten a replacement pump from Minimed about 2 weeks ago and did the first battery change last night. After the new battery was installed the pump gave A21 alarm, cleared the date/time and all my CGM graph. Also required me to rewind. It kept all of my settings. I repeated it again and it did the same thing. The alarm history gave A17 and A21. Any ideas?
Replies to This Discussion
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Permalink Reply by Sportster on
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I've heard some people were having problems with their battery caps on the 500 series. Could be a bad connection. I would call MM.
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Also, I seemed to remember reading in the manual that once you remove the battery for a replacement you have a short time period to do so without getting that alarm.
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Permalink Reply by Timothy on -
Yes you need to change our the battery faster to maintain your settings.
Also if you allowed your current battery to drain completey, you will get this alarm.
There is a short term battery in the pump that keeps the settings for 1 min or so after you take out the battery. That could also be failing if you are switching it out fast and it is still happening.
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