Blank Display - Norcold Polar N7V Service Manual

Blank Display

Before starting this procedure verify:
■ Vehicle DC voltage to the refrigerator is 10.5 to 16.0 volts.
■ No other appliance or lighting circuit is connected to the refrig-
erator DC circuit.
■ DC input of the vehicle is wired into the main control board ac-
cording to the Refrigerator Installation Manual.
Touch Power ON button
to turn refrigerator on.
Refrigerator
turns ON?
Measure DC input voltage to main
control board (power board)
at terminals 12VDC and GND.
Check continuity of F1 fuse
located on main control board
(power board).
Measure voltage at main control
board (power board) between
P1-9 (white/violet) and P1-12 (green)
Measure voltage at user interface
(controls) wire harness between P1-1
(green) and P1-5 (white/violet).
NOR000803A
Replace user interface assembly.
www.norcold.com
YES
No problem.
NO
YES
YES
YES
YES
NO
Correct DC input
10.5 to
16.0 VDC? to refrigerator.
Replace fuse
NO
Is fuse intact
(5-Amp MINI Blade
(zero ohms)?
Automotive style)
Replace main
NO
10.5 to
control board
16.0 VDC?
(power board).
Check connection/continuity of
NO
10.5 to
green wire between main control
16.0 VDC?
board (power board) (P1-12) and
user interface (controls (P1-1).
Check connection/continuity of
white/violet wire between main
control board (power board) (P1-9)
and user interface (controls (P1-5).
25
NORCOLD
Blank display.
Possible Cause:
The refrigerator will not turn ON.
Call Customer Service.
SERVICE MANUAL