Accu-Chek Instant Error codes USB The meter is connected to the PC Remove the USB cable to perform a test bluetooth connectivity symbol +Err The meter was unable to pair with a mobile device LO Blood glucose result low HI Blood glucose result high E-14 Non recoverable electronic error E-13 Test error E-12 High ascorbate level detected. E-11 Test Strip error after dosing E-10 + data and time flashing Time/ Date Error E-9 + Battery symbol Battery low error E-8 + Temperature symbol Temperature error E-7 An electronic error occurred E-6 + strip and blood drop symbol The blood drop applied too early. E-4 + Blood drop symbol The blood drop is too small. E-3 A meter or test strip error has occurred. E-1 Strip error before dosing Blank Screen The meter will not turn on or the display is blank. View all error messages Product Support User Manuals and Guides FAQ