Accu-Chek Performa Nano Error codes E-6 Blood or control solution was applied to the test strip before the flashing drop symbol appeared on the display. Discard the test strip and repeat the blood glucose or control test. E-10 The time and date settings may be incorrect. E-9 The batteries are almost out of power. E-8 The temperature is above or below the proper range for the… E-7 An electronic error occurred. E-5 This message may appear when using a white code chip in the… E-4 Not enough blood / control solution was drawn into the test… E-3 The user's blood glucose may be extremely high or a meter… E-2 The activation chip is incorrect. E-1 The test strip may be damaged or not properly inserted. Remove… View all error messages Product Support Support videos Downloads & Guides