The only time the low water sensor option should be turned on in the menu is when there are two sensors being used with the ELC-800r. There are two ways to reset this alarm. The first is to do a master reset as is talked about in the FAQ section of our website. The second thing you can do is try and change the low water sensor setting while the controller is in delay after it is first turned on. You will have about 5 seconds from the time the controller has gone through it's self test until it will go into the low water sensor alarm. By stepping though the menu with the select button you can change the setting for low water sensor to off before the controller goes into alarm.

Yes, in order to do a master reset on the ELC-800r turn the unit off, then while holding down the up and down arrows turn the unit on. The unit will beep once and then when the arrows are released the  unit will beep again and run as usual. WARNING: doing a master reset will set all the option back to default. 

 Yes, in order to do a master reset on the ELC-810 turn the unit off, then while holding down the left and right arrows turn the unit on. The unit will beep once and then when the arrows are released the unit will beep again and run as usual. WARNING: doing a master reset will set all the option back to default. 

 The sensors used in the ELC water level controller line are proximity sensors that allow for precise water level measurement without the addition of an electrical source or the complexity of a mechanical float. 

The fill valve terminals are tested each time the ELC-800r unit is turned on. The controller sends 24 VAC to those terminals in order to make sure the controller is functioning correctly. Unless there is a valve wired into placed to take the initial 24 volts off of the terminals then a voltmeter will show that there is current on those terminals. If a valve is connected and there are still 24 volts at those terminals at all times please call customer service at 877-755-8817.