Norcold N300 Service Manual
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Service Manual N300 Models - 5This refrigerator operates on these electrical sources.AC Operation 120 volts AC voltage(108 volts min. - 132 volts max.)DC Operation 14 volts DC voltage(3-way models) (13.5 volts min. - 15.4 volts max.)Operation out of these limits may damage the refrigerator’selectrical circuit parts and will void the warranty.Examine the 120 volts AC supply:WARNING: Connect the AC power cord only to agrounded three-prong receptacle. Do not remove theround ground prong from the power cord. Do not use atwo-prong adapter or an extension cord. Operation ofthe refrigerator without a correct ground could causedangerous electrical shock or death if you are touchingthe metal parts of the refrigerator or the vehicle.- Make sure the AC power cord is in a grounded three-prong receptacle.- Make sure the receptacle is within easy reach of thelower intake vent.- Make sure the power cord does not touch the burnercover, the flue pipe, or any hot component that coulddamage the insulation of the power cord.Examine the 12 volt DC supply (3-way models ):The refrigerator gets power from the 12 volt system of thevehicle; either from the battery or from an auxiliary (house)battery. The battery system not only supplies DC power tothe refrigerator, but also to other components of the vehicle.The DC heating element, which supplies power for coolingduring DC operation, has a high current draw and can causerapid battery drain.Make sure the 12 volt DC supply is connected correctly:- Make sure the DC negative wire from the battery isconnected to the black DC wire on the terminal block ofthe refrigerator.- Make sure the DC positive wire from the battery isconnected to the red DC wire on the terminal block of therefrigerator.- Make sure an in-line fuse is installed on the DC positivewire, as near the battery as possible, between the batteryand the terminal block of the refrigerator.NOTE: This in-line fuse is necessary for added safety,even though the refrigerator has a DC fuse in thecontrol assembly.Electrical ComponentsThe thermostat [1] changes the amount of propane gas thatgoes to the burner (See Art00976). This acts as the tem-perature control of the refrigerator. Number 5 is the coldesttemperature setting.NOTE: The thermostat is not an automatic gas control. Itdoes not automatically change the flame fromhigh fire to low fire as do other RV refrigerators.If the cooling load changes, you must manuallychange the gas control to maintain the sametemperature inside the refrigerator.When the outside air temperature is less than 50° F, therefrigerator may have a tendency to freeze food at the coldertemperature settings. To reduce the tendency to freeze food:- Turn the thermostat to a warmer temperature setting.- Keep the refrigerator full.- Put foods that are more likely to freeze on the uppershelf.The selector switch [2] changes the energy source of therefrigerator between propane gas ( ), AC electric ( ),and DC electric ( ) and shuts down the refrigerator at theOFF ( ) position.The gas safety valve [3] is built into the control panel. As longas a flame is present, the valve is open and allows propanegas to flow into the burner. Any loss of flame (empty propanegas tank, blow out, etc.) closes the valve and stops the flow ofpropane gas.The igniter [4] makes a spark which ignites the flame in theburner.The flame meter [5] shows if a flame is present in the burner.Controls |
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