Accu-Chek Instant 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. Lo Blood glucose may be lower than the measuring range of the… USB The meter is connected to a PC and a blood glucose or control… Hi Blood glucose may be higher than the measuring range of the… Err The meter was unable to pair with a mobile device. Battery The batteries are almost out of power.. Blank The meter will not turn on or the display is blank. E-13 Fluid or foreign material may be present in the test strip… E-14 An electronic error has occurred. E-12 Your blood sample may contain a high level of ascorbate. E-11 The test strip may be damaged. E-10 The time and date setting may be incorrect. E-9 The batteries may be out of power. E-8 The temperature is above or below the proper range for the… E-7 An electronic error occurred. E-4 Not enough blood or control solution was drawn into the test… E-3 A meter or test strip error has occurred. E-1 The test strip may be damaged, not properly inserted, or was… View all error messages