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26
Refrigerator Service Manual
NX6 / NX8 / NXA Models
DIAGNOSTIC MODE - NX64 / NX84, NXA64 / NXA84
NORCOLD
30
280
Art02397
31
32
278
30 - Power On/Off Button
31 - Mode Button
32 - Temperature Set Button
Fig. 8 - NX64 / NX84, NXA64 / NXA84 Display Board
280 - LCD (Liquid Crystal Display)
278 - Temperature Setting
Diagnostic Mode
The Diagnostic Mode uses ten diagnostic channels,
commonly known as "screens", to display "live" inputs,
outputs, and fault history. Each screen is identi
fi
ed by
a number, which shows in the optical control assembly
display. See Figure 8.
The NX64 / NX84, NXA64 / NXA84 optical control
display uses a dual 7-segment LED module to display
the screen number and diagnostic information.
Information made up of four letters or digits displays
in an alternating sequence. Fault history, "live" inputs,
and outputs is presented using LED segments. The
diagnostic LED segments, if present, display to the
right of the screen number. Diagnostic LED segments
identi
fi
cation numbers. See Fig. 9.
1
2
3
7
4
5
6
ON Light
Fig. 9 - Diagnostic LEDs Segments Identifi cation
Exit Diagnostic Mode:
1.
Press
and
hold
MODE
and
buttons
at the
same time.
2.
Release
the
MODE
and
buttons as soon as the
display shows
.
Turning the refrigerator OFF then back ON also exits
the Diagnostic Mode.
Access Diagnostic Mode:
1.
Press
and
hold
both the
MODE
and
buttons
at
the same time.
2.
Release
the
MODE
and
as soon as screen
displays.
3. A few seconds later,
displays.
Change Screens
To change screens,
press
and
hold
the
MODE
button until
the next screen displays.
