Norcold NX61 Service Manual page 25

NX64 / NX84, NXA64 / NXA84 Fault Codes - cont'd
dr
Meaning:
This fault indicates the optical display board has sensed the
refrigerator door to have been open for more than 2-minutes.
The interior light will automatically be turned off in the event
the door has been sensed open for more than 2-minutes. The
light switch, a magnetically activated reed switch attached to
the optical display board, is activated by a magnet located
beneath the refrigerator doors top trim piece.
When the magnet is close to the reed switch (door closed)
the light remains off; when the magnet is away from the reed
switch (door open) the light is turned on. The open/closed
status of the reed switch is monitored by the optical display
board and communicated back to the power board which in
turn activates the interior light output accordingly. Because the
switch operates via the proximity of the magnet, it is important
that the door alignment is correct.
Interior Light Test Procedure:
• Place a magnetic tipped screwdriver or small magnet
beneath the optical control
• Move the magnetic tipped screwdriver from side-to-side
as shown below
Interior Light Test
Verify:
• The interior light turns ON-OFF as the magnet is passed
below the optical control
• Contact Customer Service for further instructions.
Refrigerator Service Manual
code
NORCOLD
064
www.norcold.com/cda
Blank Display:
Refer to "Blank Display" on page 19.
Flashing Temperature Setting Icon
Flashing Temperature Setting ICON
A Flashing Temperature Display means the electronic controls
have sensed the fi n thermistor to be inoperable. This fault is
only displayed while the optical display is "awake." To "wake"
the display press and release either the Mode or Temp Set
buttons. If there is a problem sensed with the thermistor
the temperature setting icon will fl ash ON and OFF. After
10-seconds the control will revert back to the "sleep" mode.
This fault can be displayed in ANY MODE.
Should the thermistor be sensed inoperable the electronic
controls will ignore the thermistor and revert to a BOS
mode (Backup Operating System). The BOS mode is an
electronically controlled duty cycle that allows the refrigerator
to continue operating until such time the thermistor can be
repaired or replaced.
This duty cycle will maintain refrigerator cooling by controlling
the length of time the heat source outputs (AC heater,
LP burner, or DC heater) are energized. The duty cycle,
or length of time the cooling cycle is regulated, can be
manually controlled via the TEMP SET button. When a colder
temperature is desired, changing the temperature setting
to the next "colder" setting will provide additional cooling by
lengthening the cooling cycle. For example, if the temperature
setting is set to 5, adjusting the temperature setting to the
next colder setting of 6 will lengthen the cooling cycle. When
a warmer temperature is desired, changing the temperature
setting to a warmer setting shortens the cooling cycle. For
example, if the temperature setting is set to 4, lowering the
setting to 3 will shorten the cooling cycle.
Verify:
• The lamp-thermistor wire assembly is plugged in and
that the connections are not dirty or broken. See Fig. 5A
on page 19.
• Thermistor resistance. See Fig. 5B on page 19.
NX6 / NX8 / NXA Models
25