What does CF error code mean?

The CF error code indicates that the air filter needs to be cleaned.
Cleaning the filter and resetting the reminder will resolve the issue.  

Step 1. Slide the filter out of the unit.

Step 2. Use a soft brush or vacuum to remove dust and debris.

Step 3. Soak the filter in water with mild detergent for 30 minutes.

Step 4. Rinse the filter and let it air dry in a ventilated area away from sunlight.

Step 5. Reinstall the filter.

Step 1. Go to Options during operation.
Step 2. Use the arrow buttons to select Filter Reset.
Step 3. Select SET.