Airlock within the system will prevent it from functioning correctly, and the system will not filter any water.
Follow the steps below for an easy fix. A strap wrench is optional.
1. Open up your back panel and locate the pre-filters.
2. Remove one of the pre-filters (FT-82 or FT-92) inside the unit by twisting it off. It can be done with a wrench if you're having difficulty.
3. Reinsert the removed pre-filter by twisting it back on using the directions given by the arrows.
This will resolve the airlock issue within your system.