... of NEC or Toshiba to controller b. The precision of temperature control <=1°C c. The display is the double ... can run auto&manual heat, keep warm, auto&manual feedwater mode g. It has timer,clock,memory, leak current detection, water level detection ... LED) function etc. h. It has leak current, no water, overflow, over temperature, sensor fault, water pump fault protection etc. Controller for solar type ...