

This is a safety feature. 8. Finally, reset the Pre-Filter Life Counter by pressing the {^) key for 2 seconds. The Pre-Filter Counter will return to 0%. 10 English Changing The HEPA filter When the filter exceeds 8000 hours (approximately 1 year of use), the Filter Life Counter will display 100% life used and the Filter indicator will flash. This is a reminder that you should check the filter and replace if necessary. The proper time to change the filter depends on usage and the environment