Norcold N510 - Shift from AUTO LP Gas to AUTO AC - 2-ways; No AC Power and No Flame; Troubleshooting a F and A Faults

DRAFT
NOT FOR PUBLIC RELEASE
49
www.norcold.com/cda N500/N510 ModelsRefrigerator Service Manual
AUTO DC Operation – 3-Way Units Only
In AUTO DC mode, the controls shift to dc power
when ac power is not present and flame is not
sensed. When the controls shift to AUTO DC:
4 If a flame is not sensed the controls
shift to AUTO DC Mode. The AUTO
and DC indicators display as the
controls search for DC power.
2. The AUTO and AC indicators
display as the controls search for ac
power.
1. The AUTO mode operation indicator
displays.
No AC Power or Loss of AC Power
When no ac power is available or ac power is lost, the
controls:
2. Record and store the no ac fault in diagnostics
nonvolatile memory fault history.
Troubleshooting an "A" Fault
Use the following references to identify, troubleshoot,
and correct a no ac fault.
T Page 17, "A" fault code troubleshooting flowchart.
T Page 52, Diagnostic Mode–N510 Model, Screen 4.
AC Power Restored
When ac power is restored, the controls:
1. Automatically restore AC Manual Mode operation.
2. Clear the "A" fault code from the screen. However,
the recorded fault history will not be erased from
memory.
3. Display the AC LED.
AC Manual Mode
When the AC Manual Mode is selected, ac power is the
only heat energy source selected by the controls. When
the AC Manual Mode is selected:
2. The AC LED stays on as long as the AC Manual
Mode is selected.
LP GASAC
AUTO
1. Provide a visual warning by flashing
the “A” (no ac) fault code.
1. Mode of operation selected is
indicated by the AC LED.
LP GASAC
AUTO
5. Once dc power is detected, the AUTO
LED displays.
LP GASAC
AUTO
DC
LP GASAC
AUTO
DC
LP GASAC
AUTO
DC
3. When ac power is not detected the
controls shift to AUTO LP mode. The
AUTO and LP indicators display as the
controls start a 30 second trial-for
ignition
LP GASAC
AUTO
DC
LP GASAC
AUTO
DC
The auto sequence described in steps 1 through 5 is
repeated after the completion of each cooling cycle to
enable the controls to select a higher priority heat energy
source if available.
The controls priorities for selecting a heat energy source
are:
T First priority: AC power.
T Second priority: LP gas.
T Third priority: DC power – 3-way units only.
NOTE
AUTO DC and DC Manual Mode maintain cooling only.
NOTE