www.norcold.com/cda 51N6XX/N8XX ModelsRefrigerator Service ManualCONTROLSN61X/N81X Optical Control AssemblyThe optical control assembly communicates with thepower board through a "foamed in" wire harness.Drilling or puncturing the refrigerator rear panels maycause damage to the wire harness. Controls andrelated features are shown in Figure 36. The opticalcontrol assembly with front box attached is shown inFigure 37. The optical control assembly connected tothe wire harness is shown in Figure 38.Front BoxTwo tabs lock the front box to the optical controlassembly. A retaining screw on the hinge side retainsthe front box to the divider. Shifting the refrigerator doorswing requires shifting the front box to the selectedhinge side.Removal and Installation of Optical ControlAssembly.To remove the optical control assembly:1. Turn off the refrigerator.2. Remove the front box retaining screw, then removethe front box.3. Remove the optical control assembly retainingscrews.4. Disconnect the optical control assembly from thewire harness.To install the optical control assembly:1. Connect the optical control assembly to the wireharness.2. Install the optical control assembly on the divider.Do not overtighten the retaining screws.Figure 36. N61X/N81X Optical Control Assembly.3. Reinstall the front box. Do not overtighten theretaining screw.4. Turn on the refrigerator, then check all of theoptical control assembly functions.Figure 38. Wire Harness Connection.Figure 37. N61X/81X Optical Control Assembly WithFront Box.Temperature Setting Selector Switch5-Position Slide Switch:Slide right to select a colder setting.Setting range: 1=cold/9= coldest.GAS LEDAmber LED, indicates LP gas operation.Flashes fault codes set by the controls.ON LEDGreen LED, indicates the refrigerator is ON.AUTO operation, indicates AC power operation.Flashes fault codes set by the controls.Mode Selector Switch3-Position Slide Switch:Slide left to select AUTO operation.Slide right to select GAS operation.