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J1 - Neutral
J3 - Lower control board
Diagnosing LED Fresh Food Lighting
(Non-Dispenser Models)
On Non-Dispenser models the light switch is part of
the UI board. First check that the UI board lights up
when the door is opened. If it does not light up, check
the magnet in the right food door. Place a steel tool on
the edge of the right food door. See Figure 3-14. The
magnet operates the light control on the UI board. If the
magnet holds the tool check the connections on the UI
board and the lower control board. If the connections
are good check for 12 volts DC from the lower control
board to the UI at terminals 1 and 3 on the UI. If the
voltage is present replace the UI. If voltage is not
present replace the lower control board.
If the magnet is not present or is out of place, order a
replacement door. As a precaution, verify that the UI
and the main board are operative by following procedure
outlined above.
Follow procedure for failed test 3 in 'Diagonsing LED
Fresh Food Lighting (Dispenser Models)' outlined in the
previous section.
Figure 3-19. Non-Dispenser Models
Diagnosing Incandescent Fresh Food
Lighting
Incandescent fresh food lighting is powered directly from
the main control borad. In the event of lighting failure,
check electrical continuity, check that the main board
provides adequate voltage, check for fault with the light
socket, or replace the light bulb.
Diagnosing Incandescent Freezer
Lighting
All models are equipped with incandescent freezer
lighting. Freezer lights are powered directly from the
main control board. In the event of lighting failure,
check electrical continuity, check that the main board
provides adequate voltage, check for fault with the light
socket, or replace the light bulb.
3-21
Electronic Control
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