* Power off memory* Water temperature preset* Intelligent heating* Water insufficient alert* Leakage protection* Constant heating* Pipe warm keeping* Water Level preset * Intelligent water loading* Auto water loading* Low pressure water loading* Constant water level loading* Manual control* All-weather water supply* Auto control boosting pumpTechnical data:<;5W2.Temperature detect tolerance:+-2C3.Temperature detect range:0-90C4.Temperature control precision:+-2C5.Water level:4 level<;500W<;1500W<;10mA/0.1S9.Solenoid Valve:DC12V for pressurized and non pressurized valvesPressurized working pressure:0.02mPa---0.8mPa,for direct water supply.non pressurized:working pressure:0.00mPa,for water tank supply and low pressure water supply.Functions:1.Start self checking:when you start the controller with a "di" sound.shows the controller in normal well working.2.Water level preset:50%,75%,100% can be presetted3.Water temperature preset:the preset range from 30-80C .If don't need the electric heating,set the temperature as 00C to switch off this function.4.Water temperature display:display the water temperature in the solar water heater.5.Water level display:display the water level in the solar water heater.6.Water insufficient alert:when the water level comes down and become sufficient,the buzzer will alert and 25% water level will shining at the same time. 7.Auto water loading:when the water level comes down and become sufficient,the controller will auto loading the water to the level which is preset 30 minutes later.8.Manual water loading:if the water level is lower than the preset.press the "water load/water level" button,it can load the water to the level which is presetted.if the water level is reached the presetted level,it will be one more level than before.if