... and B . Press the arbitrary key and enter to normal work..3 Revise the password:Firstly, turn off the ... .Press A or B working switch (3,4) to work.3 .The ion density in the water has differences ... exceed 2.0A ,or the alarm will work ,it need to change the water or add water.5. ... power cord connection,blown fuseThe ion probe does not work:Check the connection,Clean thoroughly, Replace the arrayPressing ...