6-2
SERVICE DIAGNOSTICS MODE CHART
Step No.
Component
Tested
Water Filter Component
Status Indicator
Suggested Diagnostics Routine
1
2
3
4
5
6
7
Freezer
Thermistor
Refrigerator
Thermistor
Evaporator
Fan Motor
Condenser
Fan Motor
Compressor
Air Baffle
Motor
Defrost Heater
& Bimetal
01
Pass
02
Thermistor Open
03
Thermistor Short
01
Fan Motor On /
Speed OK
02
Fan Motor On /
Improper Speed
01
Condenser Fan
Motor Eneregized
01
Commpressor On /
Speed OK
02
Compressor Off
01
Air Door Open
01
Defrost Heater
Energized / Bimetal
Closed
02
Defrost Heater
Energized / Bimetal
Open
Step 1 and Step 2 are internal board tests, which
means the main controller board will check the
resistance value of each thermistor and display the
results on the water filter status indicator.
Step 3 is an internal board test, which means that
the main control board will automatically verify if
the evaporator fan motor is working properly. In
step 3, the evaproator fan motor will automatically
have its speed set to run at 2500 rpm. If the motor
does not reach this pre-selected speed, the WFI
display will indicate “02.”
Step 4 is a visual inspection test. When step 4 is
selected, if the motor is not functioning, verify that
120 VAC is between line and neutral at the con-
denser fan motor connection (white/red and white
wires).
Step 5 should turn on the compressor within a 7
second window and will run at full speed, 4500
rpm. NOTE: If the compressor does not turn on
during this step, wait 7 minutes, and recheck the
compressor.
Step 6 is a visual inspection test. When step 6 is
selected, if the damper motor is operating correctly,
the damper will attempt to open fully.
Step 7 is a visual inspection test. When step 7 is
selected, the heater will energize if the bimetal is
closed, and the WFI display will indicate “01.” If the
heater does not energize, the bimetal may be
open, and will need to be bypassed for the heater
to operate.
WARNING: If the bimetal is bypassed for test-
ing (if applicable), do not overheat the evapora-
tor area.
WATER FILTER INPUT (WFI) TEST
To confirm that the water valves are being
monitored by the WFI control, follow the pro-
cedures listed:
Testing The Dispenser Valve Input
1. Open the refrigerator door.
2. Depress the refrigerator light switch.
3. Place a container under the water spout.
4. Activate the water dispenser.
5. Read the WFI display. “00” indicates a
normal input.
Testing The Ice maker Valve Input
1. Open the refrigerator door.
2. Depress the refrigerator light switch.
3. Activate the ice maker and wait for a water
fill.
4. Read the WFI display during the fill. “99”
indicates a normal input.
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