Service Diagnostics Mode Chart; Water Filter Input (Wfi) Test - KitchenAid 2003 M Technical Education

SERVICE DIAGNOSTICS MODE CHART

Component
Step No.
Tested
Freezer
1
Thermistor
Refrigerator
2
Thermistor
3 Evaporator
Fan Motor
Condenser
4
Fan Motor
5 Compressor
6 Air Baffle
Motor
Defrost Heater
7
& Bimetal

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.
Suggested Diagnostics Routine
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.
6-2
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.
Water Filter Component
Status Indicator
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