Diagnostic Mode - N7Lx And N8Lx Models; General Diagnostic Information; Access Diagnostic Mode; Change Screens - Norcold Polar N7V Service Manual

DIAGNOSTIC MODE - N7LX AND N8LX MODELS

General Diagnostic Information

The diagnostic mode is a tool incorporated within the controls
and can be accessed via the optical display. This tool is designed
to assist in verifying temperature, inputs, outputs, and to retrieve
recorded faults stored by the controls by displaying the various
information via the LCD. Ten (10) screens, each having a particular
function, are used to display this information. For example, screen
three (3) displays the fresh food fin thermistor temperature, and
screens four (4) and five (5) display stored fault history.
The LCD utilizes a dual 7-segment display within the LCD. The
screen number is displayed utilizing the left-side 7-segment dis-
play while inputs, outputs, and various fault related information is
displayed utilizing individual segments of the right-side 7-segment
display. These individual segments will be defined/explained under
each of the individual screen descriptions to follow.

Access Diagnostic Mode

1. Touch and hold both the MODE and the Temperature Set
buttons at the same time for five (5) seconds.
2. Release the MODE and the Temperature Set buttons as
soon as Screen 1, Initial view appears.
3. A few seconds later, Screen 1, Second view appears.

Change Screens

To change screens, press and hold the MODE button until the next
screen displays.

Exit Diagnostic Mode

1. Touch and hold both the MODE and the Temperature Set
buttons at the same time for two (2) seconds.
2. Release the MODE and the Temperature Set buttons when
the mode icons and temperature setting once again display.
Turning the refrigerator OFF then back ON also exits the Diagnos-
tic Mode.
Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL

Screens and Diagnostic Segments Information

SCREEN 1: All Diagnostic Icons ON

Screen 1 Initial view
Screen 1 Second view
■ Verifies all icons are operational by turning them on.

SCREEN 2: All Diagnostic Icons OFF

Touch and release the MODE button to bring up screen 2.
Screen 2 Initial view
Screen 2 Second view
■ Verifies all icons are operational by turning them off.

SCREEN 3: Fresh Food Fin Temperature

Touch and release the MODE button to bring up screen 3.
Screen 3 Initial view
Screen 3 Second view
This screen displays the actual fin temperature being sensed by
the thermistor. This is not the fresh food cabinet air tempera-
ture. The example shows the fin temperature to be 20°F.
■ If the thermistor is "open," the second view will show "00".
■ If the thermistor is "shorted," the second view will show "99".
50
NOR000650A-13
set
AUTO
CODE
NOR000650A-14
NOR000650A-15
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