Accu-Chek COMPACT PLUS User Manual page 182

If this happens ... it means:
The drum compartment cover is not
properly closed.
Close the drum compartment cover. It
must close with an audible CLICK.
The ambient temperature is low and
the batteries are almost empty.
Move to a place where the
temperature is between +10 and
+40 °C and wait for the temperature
of the meter to adjust to this
temperature. Insert batteries (new or
recharged).
Condensation has affected the
electronics.
Allow the meter to dry slowly.
The meter is defective.
Please contact the Accu-Chek
Customer Care Line.
182
Symbols, error messages and troubleshooting