DRAFT
NOT FOR PUBLIC RELEASE
52
www.norcold.com/cda
N500/N510 Models
Refrigerator Service Manual
= 30°F
Screen
Number
2 Seconds
Blank
Screen
(2 second
pause)
1 Second
DC voltage high
AC relay stuck closed
1
3
7
4
5 6
DC voltage low
AC heater failed open
AC mode selected
but not available
Ignition fault
Flame sense failure
1
23
4
5 6
Thermistor failure.
AC voltage low AC voltage high
Screen Stored Fault History
Screen 5 also displays stored fault history using lighted
LED segments. The illustration provides fault history
information and assigned LED segments. If a fault
occurred, its assigned LED will light.
Screens and Diagnostic Segments Information
Screen Diagnostic Mode Active
Screen 1 confirms that the Diagnostic Mode is active. A
few seconds after the number displays, all LED segments
light. See illustration.
Screen Thermistor Fin Temperature
Screen 3 shows the actual fin temperature being sensed
by the thermistor. This is not the fresh food cabinet air
temperature. The example illustration below shows 30°F
fin temperature as displayed in screen 3.
Press the button to bring up screen 4.
Screen Stored Fault History
Screen 4 displays stored fault history using lighted LED
segments. The illustration provides fault history
information and assigned LED segments. If a fault
occurred, its assigned LED will light.
Screen LED Segments Reliability Check
Screen 2 confirms the reliability of the display. The screen
should go completely blank after the screen number is
displayed.
Press the button to bring up screen 5.
MODE
MODE
If the LED segments do not match the illustration, the fault
is in the optical control display. Replacing the optical
control assembly should resolve this fault.
Press the button to bring up screen 2.
MODE
If an LED segment displays, the fault is in the optical
control assembly. Replacing the optical control assembly
should resolve this fault.
Press the button to bring up screen 3.
MODE
Press the button to bring up screen 6.
MODE
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