Accu-Chek Active test strips
Error codes Hi
The test result is higher than 33.3 mmol/L (600 mg/dL). 
Your meter measures blood glucose within a defined range (0.6–33.3 mmol/L/10–600 mg/dL).
The display may indicate that your blood glucose is above than the measuring range of the system (33.3 mmol/L or 600mg/dL).
Follow the relevant instructions given by your healthcare professional and immediately repeat the test.
If this does not match how you feel, contact customer support.