Norcold N500 - N510 Diagnostic Mode Operations; Diagnostic Mode Overview and Access; Navigating Diagnostic Screens

DRAFT
NOT FOR PUBLIC RELEASE
48
www.norcold.com/cda
N500/N510 Models
Refrigerator Service Manual
NOTE 1
No AC Power and No Flame
When AC power is not present and a flame is not
sensed, the controls:
1. Acknowledge both faults after the 30 seconds trial-
for-ignition is over.
2. Shut off power to the solenoid gas valve.
3. Set "gas lock-out". See NOTE 2.
4. Provide a visual warning by flashing alternating “A”
(no ac) and “F” (no flame) fault codes, shown below.
N510 models are designed for 2-way or 3-way
operation.
AUTO Mode - All N510 Units
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, the controls second priority
heat energy source.
AUTO Mode – N510.3 (3-way units)
In 3-way units, if ac is not available, if a flame is not
sensed, the 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 in AUTO mode, see page 49.
AUTO AC Operation
When AUTO mode is selected:
N510 Modes of Operation
In AUTO mode, pressing the MODE pushbutton
momentarily displays the heat energy source in use.
For example, in AUTO AC, the AC LED will come on
and stay on for approximately 10 seconds.
LP GASAC
AUTO
2. The AC LED comes on as the
controls search for ac power
availability.
LP GASAC
AUTO
3. The AC LED turns off when ac
power is detected by the controls.
Mode operation is indicated by the
AUTO LED. See NOTE 1
LP GASAC
AUTO
1. Mode of operation is indicated by the
AUTO LED.
AUTO LP Gas Operation
In AUTO mode, the controls shift to LP gas when ac
power is not available or interrupted. The shift to AUTO
LP proceeds as follows:
2. The AC LED comes on as the controls
verify ac power availability.
LP GASAC
AUTO
LP GASAC
AUTO
1. The AUTO LED indicates the unit is
on and operating in AUTO mode.
3. Since AC power is not detected, the
controls shift to LP gas. The LP LED
comes on to signal the start of a 30
second trial-for-ignition.
LP GASAC
AUTO
4. Once the controls sense the flame,
the LP GAS LED turns off leaving the
AUTO LED on to indicate AUTO mode
operation.
LP GASAC
AUTO
Troubleshooting a "F" and "A" Faults
Use the following references to identify, troubleshoot,
and correct an ignition failure and/or no ac faults.
T Page 15, "F" fault code troubleshooting flowchart.
T Page 17, "A" fault code troubleshooting flowchart.
T Page 52, Diagnostic Mode–N510 Models, Screen 4.
LP GAS AC
AUTO
LP GAS AC
AUTO
Alternating "A" and "F" Codes
5. Record and store the no ac and no flame faults in
diagnostics nonvolatile memory fault history.
Shift from AUTO LP Gas to AUTO AC - 2-ways
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.
In AUTO mode, the controls maintain "gas lock-out" until
a full cooling cycle on AUTO AC is completed. Turning
the refrigerator OFF and back ON also clears "gas lock-
out."
NOTE 2