Accu-Chek Performa Error codes E-4 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 blood glucose or control test. Battery Issue Battery is dead. Insert new battery. Insert one 3-volt lithium… Setup Mode The meter is in set-up mode, waiting for you to change or… Insert Blood Sample The meter is ready for a drop of blood or control solution. Insert Strip The meter is ready for you to insert a test strip. E-10 The time and date settings may be incorrect. Make sure the… E-9 The battery is almost out of power. Change the battery now. If… E-8 The temperature is above or below the proper range for the… E-7 An electronic error occurred, or in rare cases, a used test… E-6 Blood or control solution was applied to the test strip before… E-3 Your blood glucose may be extremely high or a meter or a test… E-1 The test strip may be damaged or not properly inserted. Remove… LO Your meter measures blood glucose within a defined range (0.6–… HI Your meter measures blood glucose within a defined range (0.6–… White screen Battery is dead. Insert new battery. Insert one 3-volt lithium… View all error messages Product Support Get the most out of your Accu-Chek products with support and troubleshooting tips. Videos Library User manuals & guides FAQ's