Fault Code - "No" "Dt" With Audible Alarm - Norcold Polar N7V Service Manual

TROUBLESHOOTING FLOWCHARTS - N7LX AND N8LX MODELS, cont'd.

Fault Code - "no" "dt" with audible alarm

Check that the blue wire, within the main
wire harness, is fully plugged in; both at
P1-14 of main control board assembly
(power board) and P1-3 of user interface
(optical display).
plugged
With the wire harness unplugged from the
main control board assembly (power
board) and the user interface (optical
display), check continuity of the blue wire
to make sure the wire is not "open".
Continuity?
Replace the refrigerator.
NOR000796A
Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL
Fully NO
Correct connections.
in?
YES
YES
Check that there is NO continuity
between the blue wire and ground.
NO (OPEN)
Check that there is NO continuity
between the blue wire and any of the
other wires of the wire harness.
Reconnect the wire harness at main
control board assembly (power board)
and the user interface (optical display).
Replace the main control board assembly
(power board).
YES
Continuity?
NO
YES
Continuity?
NO
46
CODE CODE
Alternately flashes "no" and "dt"
with an audible alarm.
Possible Cause:
Communications between the user
interface (controls) and the main control
board assembly (power board)have
been lost.
Shorted to ground.
Replace the refrigerator.
Shorted to another wire.
Replace the refrigerator.
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