Most likely your floater is broken
The floater switch indicates to the Aquablu Pro when it can start and stop producing purified water. After each cycle, the system performs a flush, in order to keep the membrane clean.
When the floater switch is broken, it will communicate with the Aquablu Pro as if it constantly requires new water. The system will produce a small amount of purified water, after which it will initiate a flush again. When this event occurs, the system will enter a never-ending production loop.
The best thing to do is to shut the system down and replace the floater. When you are not familiar with replacing the floater switch, please contact your local plumber or Aquablu service partner.