Norcold N500 - Optical Display Does Not Turn On - Power is available - N510

DRAFT
NOT FOR PUBLIC RELEASE
14
www.norcold.com/cda
N500/N510 Models
Refrigerator Service Manual
Optical Display Does Not Turn On - Power is available - N510
12 Vdc
present?
12 Vdc
present?
Correct 12 Vdc voltage input to
power board.
NO
YES
Check for control voltage
across optical control wire
harness connector white/red
wire and white/violet wire.
NO
Check condition of power board fuse F1.
Replace fuse if open (blown).
YES
Check for control voltage
across power board
terminals 12VDC and GND 1.
12 Vdc
present?
Check for control voltage
across power board wire
harness connector white/red
wire and white/violet wire.
NO
Replace power board. See page 43.
YES
12 Vdc
present?
Push and hold OFF/ON
switch, then check voltage
across wire harness optical
control connector blue and
white/violet wire.
NO
Replace optical control display circuit
board. See page 47.
YES
12 Vdc
present?
Release the OFF/ON switch,
then check voltage across
wire harness optical control
connector green and
white/violet wire.
NO
Replace power board. See page 43.
YES
LED
illuminated?
Check optical control
display operation.
NO
Replace optical control display circuit
board. See page 47.
YES
Refrigerator operating as designed.