Flashing Temperature Setting Icon - Norcold 2118IM Service Manual

Fault Codes, cont'd.
dr
Meaning:
This fault indicates the optical display board has sensed that one
or both of the fresh food doors have been open for more than
2-minutes. If this fault is displayed, the fresh food interior light will
automatically be turned off. Once both doors are closed, the fault
code will be cleared and the interior light will be allowed to operate.
This fault can be displayed in any mode of operation.
Verify:
■ Both fresh food doors are latching when closed. Adjust the
strike plate if needed.
■ Both latches are operating correctly. Fix or replace handle latch
if necessary.
■ Both doors are aligned correctly. Align doors if necessary.
■ Both doors are not damaged or warped. Replace door if neces-
sary.
■ Light switches turn off light when held closed. If not, replace
switch.
■ Check for worn hinge bushings. Replace if necessary.
■ Check for bent bottom hinges. Replace if necessary.

Flashing temperature setting icon

Flashing Temperature Setting ICON
A Flashing Temperature Display means the electronic controls
have sensed the fin 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
flash 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 Oper-
ating 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
2118, 2118IM, 2118IMD Series
code
set
length of time the heat source outputs (AC heater and propane gas
burner) are energized. The duty cycle, or length of time the cool-
ing 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 addi-
tional 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 fresh food fin thermistor is plugged in and that the connec-
tions are not dirty or broken.
■ Thermistor resistance (Check resistance at thermistor connec-
tor with thermistor packed in ice bath).
Temperature* (°F)
85
80
75
70
60
50
40
35
33
32
* Approximate values
■ An alternate method would be to use an infrared gun to
measure the fin temperature. Then compare that tempera-
ture with the temperature indicated on Diagnostic Screen
#3. The temperature difference should be 6° F or less. If
not, thermistor is bad.
24
Resistance* (k Ω)
8.1 - 9.0
9.1 - 10.0
10.1 - 11.0
11.1 - 12.0
12.1 - 13.0
15.5 - 16.5
22.5 - 23.5
24.5 - 25.5
28.5 - 29.5
30.0 - 32.0
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