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www.norcold.com/cda 57N6XX/N8XX ModelsRefrigerator Service Manual
Modes of Operation
AUTO
In AUTO mode, AC power is the first heat energy
source selected by the controls. If AC power is not
present, the controls shift to LP gas (propane), the
second priority heat energy source.
AUTO – N64X.3/N84X.3 (3-way units)
In 3-way units, if LP gas if a flame is not sensed, then
flame goes out, or an ignition failure occurs, the
controls shift to DC power, the third priority heat
energy source. For additional information on 3-way
units AUTO mode, see page 58.
AUTO LP Operation
The controls shift to AUTO LP mode any time AC
power is not available. The controls shift to AUTO LP
as follows:
Shift from AUTO LP GAS to AUTO AC
In AUTO mode, the controls shift automatically from
AUTO LP GAS back to AUTO AC when the controls
detect that AC power has become available.
Troubleshooting No Flame and No AC Faults
Use the following references to identify, troubleshoot,
and correct an ignition failure and/or no AC faults.
n Page 12, "F"/"no" "FL" fault codes
troubleshooting flowchart.
n Page 16, "A"/"no" "AC" fault codes
troubleshooting flowchart.
n Page 62, Diagnostic Mode–N62X/N82X Models,
Screen 4.
AUTO AC Operation
When the AUTO mode is selected, the controls:
Shift from AUTO LP GAS to AUTO AC
In AUTO mode, the controls shift automatically from
AUTO LP GAS to AUTO AC any time the controls
sense that AC power is available.
No AC Power and No Flame
When AC power is not present and a flame is not
sensed, at the end of the 30 seconds trial-for ignition,
the controls:
1. Shut off power to the solenoid gas valve.
2. Set "gas lock-out". See NOTE 2.
3. Sound the alarm (an intermittent beeping tone).
4. Provide a visual warning by flashing alternating
"no" "AC" and "no" "FL" (no flame) fault codes
shown below).
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5. Record and store the "no" "AC" and "no" "FL"
faults in diagnostics nonvolatile memory fault
history.
1. Display AUTO ("AU") mode operation
indicator.
3. Turn off "AU" and "AC" when AC power is
selected and displays the ON LED. See
NOTE 1.
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2. Flashes "AU" and "AC" as the
search for AC power begins.
1. The AUTO mode operation indicator
("AU") displays.
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2. "AU" and "AC" indicator
alternate flashing on the display
while the controls search for AC
power.
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3. When AC power is not present, the
controls shift to AUTO LP mode. "AU"
and "LP" alternate flashing on the
display as the controls start a 30
seconds trial-for ignition.
4. The controls sense the flame, turn off the
"AU" and "LP", and display the ON LED.
See NOTE 1.
AUTO LP mode remains in "gas lock-out" until a full
cooling cycle on AUTO AC is completed. "Gas lock-
out" can also be cleared by turning the refrigerator OFF
then back ON.
NOTE 2
In AUTO mode, pressing the MODE switchbutton
momentarily displays the heat energy source in use.
For example, in AUTO AC, the display alternate flashing
AU and AC for approximately 10 seconds.
NOTE 1