ii Refrigerator Service Manual www.norcold.com/cda N6XX/N8XX ModelsAUTO Mode ...................................................................... 52No AC Power ..................................................................... 52AC Power Restored .......................................................... 52No AC and No Flame ........................................................ 52GAS Mode ......................................................................... 52No Flame ........................................................................... 52Backup Operating System .................................................. 52“Gas Lock-Out” ................................................................... 52N62X/N82X Optical Control Assembly ............................... 53Front Box ........................................................................... 53Removal and Installation of Optical Control Assembly ..... 53Modes of Operation ............................................................ 54AUTO Mode ...................................................................... 54AUTO AC Operation ......................................................... 54AUTO LP Gas Operation .................................................. 54Shift from AUTO LP GAS to AUTO AC ............................. 54No AC Power and No Flame ............................................. 54Troubleshooting a "F"/"no" "FL" and "A"/"no" "AC" Faults 54AC-Manual Mode .............................................................. 54LP Gas–Manual Mode ...................................................... 54No AC Power or Loss of AC Power .................................. 55Troubleshooting a "A"/"no" "AC" Fault .............................. 55AC Power Restored .......................................................... 55Flame Fails to Ignite or Flame Goes Out ......................... 55Clearing "Gas Lock-Out" ................................................... 55Troubleshooting a "F"/"no" "FL" Fault ............................... 55N64X/N84X Optical Control Assembly ............................... 56Front Box ........................................................................... 56Removal and Installation of Optical Control Assembly ..... 56Modes of Operation ............................................................ 57AUTO ................................................................................ 57AUTO AC Operation ......................................................... 57AUTO LP Operation .......................................................... 57Shift from AUTO LP GAS to AUTO AC ............................. 57No AC Power and No Flame ............................................. 57Shift from AUTO LP GAS to AUTO AC ............................. 57Troubleshooting No Flame and No AC Faults .................. 57AUTO DC Operation – 3-Way Units Only ......................... 58AC-Manual Mode ................................................................ 58No AC Power or Loss of AC Power .................................. 58AC Power Restored .......................................................... 58Troubleshooting "no" "AC" Fault ....................................... 58LP-Manual Mode ................................................................. 59Flame Fails to Ignite or Flame Goes Out ......................... 59DC-Manual Mode ................................................................ 59No DC Power to DC Heater Circuit .................................. 59Diagnostic Mode — Models N62X/N82X -------------- 60Diagnostic Mode ................................................................. 60Accessing the Diagnostic Mode ....................................... 60Changing Screens ............................................................ 60Exiting the Diagnostic Mode ............................................. 60Screens and Diagnostic Segments Information ............... 61Diagnostic Mode — Models N64X/N84X -------------- 63Diagnostic Mode ................................................................. 63Accessing the Diagnostic Mode ....................................... 63Changing Screens ............................................................ 63Exiting the Diagnostic Mode ............................................. 63Screens and Diagnostic Segments Information ................. 64Ice Maker -------------------------------------------------------- 66Wire Harness ...................................................................... 66Fill Tube .............................................................................. 66Water Valve ......................................................................... 66Specifications ...................................................................... 66Replacing the Ice maker ..................................................... 67Ice Maker Troubleshooting Chart ....................................... 67Cycle Test ........................................................................... 68Water Fill Adjustment .......................................................... 69Low Ice Yield ....................................................................... 69Water Valve Operation Test ................................................ 69Water Valve Solenoid Resistance ...................................... 69Mold Heater Resistance Check .......................................... 70Checking Voltage at Motor Terminals ................................. 70Winterizing the Ice Maker Water ........................................ 70N64X IM/N84XIM – Wiring Pictorial for Ice Maker Wired toRefrigerator AC Cord .......................................................... 70N64X IM/N84XIM – Wiring Schematic for Ice Maker Wired toRefrigerator AC Cord .......................................................... 70N64X IM/N84XIM – Wiring Schematic for Ice Maker Wired toWhite AC Power Cord ......................................................... 72N64X IM/N84XIM – Wiring Pictorial for Ice Maker Wired toWhite AC Power Cord ......................................................... 72