How does the Self-Cleaning Cycle work?

Auto Cleaning Mode prevents buildup by reversing the filter pump. 
You may watch SETUP VIDEOS from this youtube link to see how filter function works in 4'07''-4'27'': 

- When in this mode, the display will show "CLE". Press any button to exit the mode.

- After each manual stop of the filtration system, a 20-second auto-cleaning cycle will automatically activate.
  For example, if the heater is turned on and the filtration stops, the 20-second cleaning cycle begins.
  If the filtration is already off, this cycle will not trigger.

- You can also manually start a 100-second cleaning cycle by pressing the FILTER and UP buttons simultaneously.