Screens And Diagnostic Segments Information - Norcold N109X Series Service Manual

Screens and Diagnostic Segments Information

Screen Diagnostic Mode active
Screen 1 confirms that the Diagnostic Mode is active. A
few seconds after the screen number appears, all LED
segments light. See illustration.
If the screen segments do not match the ones shown
in the illustration, the fault is in the optical control
assembly. Replacing the optical control should resolve
the fault. See page 39.
Press the button to bring up screen 2.
MODE
Screen LED Segments Reliability Check
Screen 2 diagnostics continue to confirm the reliability
of the display. After a few seconds only the ON light
displays. All other LED segments should be off. See
illustration.
The ON light should be the only LED displayed. If any
other LED displays, the fault is in the optical control
assembly. Replacing the optical control should resolve
the fault. See page 39.
Screen thermistor fin temperature
Screen 3 displays the actual fin temperature being
sensed by the thermistor. this is not the fresh food
cabinet air temperature. The illustration shows 32°F fin
temperature as displayed in screen 3.
Press the button to bring up screen 4.
MODE
Refrigerator Service Manual
Screen
Screen 4 displays stored fault history using lighted
LED segments. The illustration provides fault history
information with assigned LED segments . If a fault
occurred, its assigned fault history LED will be on.
Press the
Screen
Screen 5 also displays stored fault history using lighted
LED segments. The illustration provides fault history
information with assigned LED segments . If a fault
occurred, its assigned fault history LED will be on.
Flame sense failure
ON Light
Press the
Screen
Screen 6 provides a way to erase fault history from
memory. To erase fault history:
1. Press and hold the
on the screen.
2. Release the button when
screen.
3. Wait five seconds.
= 32°F
4. Press and hold the
on the screen.
Press the
Stored fault history
button to bring up screen 5.
MODE
Stored fault history
Thermistor failure
1
2
Screen
Number
5 6
AC voltage low
button to bring up screen 6.
MODE
Erase fault history
button when
TEMP
SET
TEMP button until
SET
button to bring up screen 7.
MODE
AC voltage high
shows
shows on the
shows
45
N109X Models