A.O. Smith HYB-90N warranty Numeric Display

Numeric Display

Numeric information such as temperature set-point, maintenance codes and error codes are displayed using a large yellow LED display.

Up and Down Buttons

Two buttons (with “Up” and “Down” arrows) are used for adjusting the data on the display. Other secondary functions such as turning the Key Lock “Off”, are described in other sections.

Temperature Set-point change

Two buttons (with “Up” and “Down” arrows) are used to adjust the desired temperature set-point.

When the Temperature Set-point is displayed and the Key Lock Is “Off”, pressing the Up Button will increase the set-point and pressing the Down button will decrease the set-point.

NOTE: The Temperature Set-point cannot be adjusted beyond the limits of the current Mode selected.

Burner in Operation

When the burners are in operation and flame is detected by the flame sensor, the flame symbol is illuminated.

Switching Between Units of Measure

Switching between temperature units of measure (°F/°C). Two yellow LEDs will be used to light up the current unit mode, °F or °C. To switch units of measure, simultaneously press the “Mode” button and the “Up” button.

Fault Indication

A red fault LED (lighting a large red exclamation point) should be present on the display panel.

Maintenance mode

By simultaneously pressing the “Mode” and “down arrow” buttons for 3 seconds the unit will allow access to the maintenance mode.

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