A.O. Smith 500A Changing the Display Units, Fault and Warning Conditions, Example of a Warning

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4.Changing the Display Units

The display interface to the heater has the option of selecting between degrees and Fahrenheit and degrees Celsius for temperature displays. This can be found in the "Display Settings" menu. Also in this menu, you may adjust how the backlight operates and the contrast of the LCD screen.

5.Fault and Warning Conditions

This water heater is equipped with electronic controls that have the ability to monitor almost all aspects of the water heater operation. In the case that there is an undesirable or unsafe condition that occurs, the water heater controls will detect this condition and determine the appropriate action. Part of this is displaying the information on the LCD in plain text that accurately describes the condition and diagnostics information that can be used to correct the issue.

There are two types of conditions that can occur during operation. These are: Warnings and Faults:

•Warnings: This is a non-safety related condition that the control has detected that may cause the water heater to operate in a less than optimal condition, but does not pose a safety concern.

NOTE: When these conditions occur, continued heating cycles will continue and the heater will attempt to regulate the water in the tank to the Operating Set Point.

Example of a Warning:

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Contents Cyclone Xi Model BTH 300A, 400A, 500A ROUGH-IN-DIMENSIONS ForewordTable of Contents FeaturesQuick Installation Tips Horizontal Sidewall Venting Vertical Rooftop VentingHigh Limit Switch E.C.O Water Temperature Setpoint Adjustment ProcedureDishwashing Machine Requirement Required Ability Installation InstructionsCirculating Pump Insulation BlanketsAIR Requirements ClearancesHard Water Unconfined SpaceInstallation of Carbon Monoxide Detectors VentingCanadian Direct Vent US Horizontal Vent Vent Pipe Termination Direct Vent Terminal InstallationDirect Venting Installation Sequence Vertical Vent Terminal InstallationInstallation of Vent System Vent Length TableControls and Switches HOT Surface Igniter GAS PipingConnection of GAS Pipe System Connections Heater Wiring Water Potable Heating and Space HeatingBTH 300 Wiring Diagram BTH 400 and 500 Wiring Diagram Sequence of Operation OperationElectronic Control OverviewAdjusting the Operating Set Point Changing the Display Units Fault and Warning ConditionsExample of a Warning Example of a Fault Advanced Diagnostics Information Access to the Current Fault or WarningViewing the Fault History Viewing Information About the HeaterOperating Instructions Prior to Start UP Required AbilityOperating Instructions Maintenance General InformationSediment Removal FlushingDraining Lime Scale RemovalDrain Valve and Access Panels Powered Anode SystemVent System Installation Diagrams U T I O N if BuildingPage Must be Identical Heaters Pipe Relief Valve to Open Drain Page Multiple Unit Installations Troubleshooting Motor will not RUN Motor RUNS, Burner Lights Momentarily Then Locks OUTNoisy Burner Operation Replacement PartsGAS Fails to Shut OFF Model BTH Limited Warranty
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