Accu-Chek performa Owner's Booklet page 67

Not enough blood or
control solution was
drawn into the test
strip for measurement
or was applied after
the test had started.
Discard the test strip
and repeat the test.
The code chip is from
an expired lot of test
strips. Ensure the code
chip number matches
the code number on
the test strip container.
Make sure the time and
date in the meter are correct.
Blood or control solution
was applied to the test
strip before the flashing
drop appeared on the
display. Discard the test
strip and repeat the test.
An electronic error
occurred or, in rare cases,
a used test strip was
removed and reinserted.
Turn the meter off and on,
or take the battery out for
20 seconds and reinsert it.
Perform a blood glucose or control test. If the
problem persists, call Roche.
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