The cleaner seems to beperforming less efficiently.The brushes have become smooth orthe "wear" indicator shows.Replace the brushes following the procedure inSection 5.3, "Replacing the Brushes".Filter canister is full or dirty. Clean the filter canister following the procedure inSection 5.1, "Cleaning the Filter Canister".Floating cable is excessively coiled orkinked.Make sure the floating cable is spread out over thepool. Ensure the cable is not too tightly wrappedor coiled when storing. If the problem persists, laythe cable straight in the sun to relax it and removekinks.vortex 4 Onlysymptom Cause solutionThe remote control does notwork.The batteries are dead and need tobe replaced.Replace the batteries in the remote control.The remote control is notsynchronized to the control unit.synchronizing procedure:When replacing the control unit or the remotecontrol, it is necessary to synchronize the newremote control with the control unit:1. Connect the Vortex 4 to the control unit,then plug the control unit to the receptacle.2. Press OFF + Cycle I buttons for morethan 6 seconds until both lightsflash once:3. Press and hold the "rotate right" button onthe remote control unit.4. The light on the right will flash5 times then bothlights will flash together.5. The synchronization procedure iscompleted when both lights switch off.Page 19ENGLISHZodiac ® Vortex™ 3, Vortex 4 Robotic Pool Cleaner | Owner's Manual