The Function Display Panel does  not come on.  A power plug is not property  inserted, or it is inserted into  a faulty outlet.  Properly insert power plug  into a correctly functioning  power outlet.  The fuse is blown.  The fuse is not inserted  properly.  Replace the fuse.  A spare fuse is included in your  reagent kit. (3A / 250V fuse)  *Immediately unplug the unit and  contact your dealer to arrange  service.  The Function Display  Panel / display indicators do not  come on even after turning the  tap on.  Faulty PCB (Printed Circuit Board)  Immediately unplug the unit and  contact your dealer to arrange  service.  Power supply is suddenly cut off  while operating the unit.  Elevated level of salt in the water  or high TDS;  extended operation at high pH;  sudden flux in electrical current.  In these cases your machine  will shut down automatically to  protect the  electrodes and circuitry.  Wait - the unit will become  operational again after about  one hour.  Your ionizer has a safety  mechanism built-in to protect the  electrodes and circuitry.  This mechanism will shut the  ionizer down automatically.  This mechanism protects the unit  from overuse or excessive  electric current.