www.norcold.com/cda54 Refrigerator Service ManualN6XX/N8XX ModelsIn AUTO mode, the controls maintain "gas lock-out"until a full cooling cycle on AUTO AC is completed.Turning the refrigerator OFF and back ON also clears"gas lock-out".NOTE 2Shift from AUTO LP GAS to AUTO ACIn AUTO mode, the controls shift automatically fromAUTO LP GAS back to AUTO AC when the controlsdetect that AC power has become available.All N62X and N82X are designed for 2-way operation.AUTO ModeIn AUTO mode, AC power is the first heat energysource selected by the controls. If AC power is notpresent, the controls shift to LP gas (propane), thecontrols second priority heat energy source.AUTO AC OperationWhen AUTO mode is selected:Troubleshooting a "F"/"no" "FL" and "A"/"no" "AC"FaultsUse the following references to identify, troubleshoot,and correct an ignition failure and/or no AC faults. Page 12, "F"/"no" "FL" fault codes troubleshootingflowchart. Page 16, "A"/"no" "AC" fault codes troubleshootingflowchart. Page 62, Diagnostic Mode–N62X/N82X Models,Screen 4.Modes of OperationLP GASACAUTO1. Mode of operation is indicated by theAUTO LED.LP GASACAUTO2. The AC LED comes on as thecontrols search for AC poweravailability.LP GASACAUTO3. The AC LED turns off when ACpower is selected by the controls.Mode operation is indicated by theAUTO LED. See NOTE 1.In AUTO mode, pressing the MODE switchbuttonmomentarily displays the heat energy source in use.For example, in AUTO AC, the AC LED will come onand stay on for approximately 10 seconds.NOTE 1AUTO LP Gas OperationIn AUTO mode, the controls shift to LP gas when ACpower is not available or interrupted. The shift to AUTOLP is as follows:LP GASACAUTOLP GASACAUTOAlternating "A" and "F" Codes5. Record and store the no AC and no flame faults indiagnostics nonvolatile memory fault history.N62X/N82X models with serial number 854467 andlower equipped with the original power board (p/n619353) and optical control assembly (p/n 619350) willonly display fault indicator A.NOTE 32. The AC LED comes on as the controlsverify AC power availability.LP GASACAUTOLP GASACAUTO1. The AUTO LED indicates the unit ison and operating in AUTO mode.3. Since AC power is not present, thecontrols shift to LP gas. The LP LEDcomes on to signal the start of a 30seconds trial-for ignition.LP GASACAUTO4. The controls sense the flame, turn offthe LP GAS LED leave the AUTO LEDon to indicate AUTO mode operation.LP GASACAUTONo AC Power and No FlameWhen AC power is not present and a flame is notsensed, the controls:1. Aknowledge both faults after the 30 seconds trial-for ignition is over.2. Shut power to the solenoid gas valve.3. Set "gas lock-out". See NOTE 2.4. Provide a visual warning by flashing alternating A(no AC) and F (no flame) fault codes, shown below.See NOTE 3.