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Troubleshooting
Unit is not plugged in. Plug power cord into electrical outlet.
Front Panel may not be properly installed. Remove and reinstall the Front Panel to assure proper placement.
Refer to FILTER REPLACEMENT on page 16.
Household circuit breaker / ground fault interrupter has tripped or blown a fuse. Reset circuit breaker /
ground fault interrupter, or replace fuse. For assistance, contact a licensed electrician.
The unit has blown a fuse. Cease usage and unplug. Contact Consumer Service for assistance.
Unit is damaged or in need of repair. Cease usage and unplug. Contact Consumer Service for assistance.
Unit set to a low speed setting. Adjust to a higher speed setting.
Debris build-up on filter. Check and replace Filters.
Airflow is blocked. Remove obstruction.
There may be too much light in the room. Either manually turn the unit to low speed for minimal sound or
darken the room.
Sleep Mode may be selected. When in low light or no light, the unit will only operate at low speed. This will
override Automatic Dust Sensing Mode. In regular light, the unit will return to Automatic Dust Sensing Mode
operation.
The Dust Sensor may need to be cleaned to accurately read dust levels. See CLEANING AND MAINTE-
NANCE on page 17 for complete instructions.
Unit fails to power on.
Airflow is weak or slow.
Sleep Mode is not working.
Automatic Dust Sensing
Mode is not working.
Problem Possible Cause and Solution