I was not able to find anything specific about an A33 by Googling Medtronic’s site. I just stumble upon this other really old post about the error from 2008 on TuDiabetes.
The US number for contacting Medtronic support is 1.800.646.4633.
At the moment I believe their phone menu is to first press “1” for product support and then press 1 again for insulin pump support. The phone system will then request the full date of birth of the person who owns the pump in MM DD YYYY format and then the five digit zip code of their address on record with Medtronic.
When you talk with a support rep they will also ask for the serial number of the pump. And heck, they may also ask what your most recent Blood Glucose (BG) value was. (I think it’s in their script).
If the pump is still under warranty then Medtronic will ship out a replacement. However it probably won’t show up until Monday morning because UPS & FedEx don’t deliver on the weekend. But perhaps Medtronic expedite in some way? Only way to find out is to call the help line and talk to a support rep.