– 50 –
Enter the diagnostic mode by pressing both freezer temperature pads (plus and minus) and the refrigerator
temperature pads (plus and minus) simultaneously. All four pads must be held for approximately three
seconds. A blinking "0" in both displays indicate the refrigerator has entered diagnostic mode.
Diagnostic Mode
Freezer
Display
Fresh Food
Display
Diagnostics
Results
Comments
0
1
Showroom Mode
Enters showroom mode.
FF doors must be closed
and reopened to start
showroom mode.
0
2
Communication
check between HMI
and main control
board.
"P" on FZ display if okay.
"F" on FZ display means
problem is found.
0
6
HMI self test
All LED's and numeric
segments will illuminate.
0
7
Control and sensor
system self-test.
Checks each thermistor and
displays "P" for pass and "F"
fail.
See Note 1 below.
1
0
Damper Test
Damper will open, pause
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1
2
100% Run Time
Sealed system on 100% of
the time. Times out after 1
hour.
Cannot be entered if
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1
3
Pre-chill Test
Starts pre-chill mode. Unit
returns to normal on its own.
Cannot be entered if
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1
4
Defrost Test
Toggles the defrost cycle.
See Note 2 below.
Must press again to turn
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entered if refrigerator
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Note 2
below.
1
5
Main Control Reset
Causes a system reset.
1
6
Exit Diagnostic Mode
Causes a HMI board reset.
1
7
Degree C/F
Changes temperature
display from F to C.
Note 1: Thermistor display order is: 1) Fresh Food 1, 2) Fresh Food 2, 3) Ambient, 4) Evaporator, 5) Freezer.
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Enter the appropriate display numbers as shown below and press any pad other than the temperature pads
to activate that test mode.
Note 2
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heater will not come on if the evaporator thermistor or over temperature thermodisc is warm.