36Fill Check Mode• A float switch is used to determine if the tank is full. If the float switch contact is open, the tank is full. If the float switch contact is closed it is not fullhowever there may still be water in the tank so the fill time may be short.• If the tank is not full or float switch is closed, the LCD screen will display 'Hot Water Set up' and the control pulses the RED LED around the T & P switch,starts the Delay Timer of 30 seconds then checks for the T & P switch to be activated before timer times out then displays the ‘Setup Canceled’ screen for 3seconds .• When the T & P switch is activated, the control will start the Maximum Fill Timer of 120 seconds the control turns on the RED LED around the T & P switch.• The main board will activate the isolation water valve, the door board will activate the Hot Water valve to fill the hot water tank, and the LCD screen willdisplay the 'Filling‘.• If the T & P switch is released while the tank is being filled the control pulses the RED LED around the T & P switch, starts a 30 sec. timer, the Maximum Filltimer will stop counting, both isolation and hot water valves are deactivated and the screen displays 'Filling Paused‘.• If the T & P switch is reactivated within the 30 second, the control turn on the red LED around the T & P switch, resumes filling and restart the count of theMaximum Fill Timer from the point the T & P switch was released.• When the tank is full the float switch contact opens and the ‘Complete’ screen is displayed for 3 seconds then displays the ‘Hot Water’ screen.Fill Check & Fill Mode Note: bypassed if tank is fullTurn and Push(T & P) switchRED LEDSolid or PulsesRED Knob LED pulsing .Time out 30 sec to ‘Setup Canceled’ Release T&P switchRed knob LED offDisplayed for 3 seconds then to home.Displays if a hot water system error occursRED Knob LED onTime out 30 sec to‘Setup Canceled’If knob isreleasedBefore filledRED Knob LED pulsing .Time out 30 sec. to ‘Setup Canceled’