Accu-Chek Active Error codes EEE A meter error has occurred. Repeat the blood glucose test or control test with a new test strip. If the error message appears again, the meter is defective. Contact Accu-Chek Customer Care. Battery symbol The battery is almost empty Blank screen The battery is empty or you have inserted the battery the… Lo The test result is lower than 0.6 mmol/L (10 mg/dL). Hi The test result is higher than 33.3 mmol/L (600 mg/dL). --- Averages cannot be calculated. End The meter has been disconnected from the computer (PC). PC The meter is connected to a computer (PC). ttt The ambient temperature or the meter temperature is too low or… E-5 The meter is exposed to too much light. E-5 The meter was exposed to a strong electromagnetic field. E-4 While the test was in progress, you connected the meter to a… E-2 E-2 Your blood glucose value may be very low. E-1 E-1 You did not insert the test strip into the meter correctly… View all error messages