KitchenAid KSSC36FKB00 Technical Education page 65

PROBLEM
No DC control voltage from main
PCB to the inverter board.
Condenser fan runs
Control voltage wires loose or
but the compressor
reversed.
will not start.
Compressor.
Inverter board.
Refrigerator control set too
warm.
Refrigerator thermistor.
Refrigerator
Air door stuck closed or
compartment
inoperative.
too warm.
Evaporator fan motor not
running.
Blocked air flow.
Warm freezer compartment.
Refrigerator control set too cold. Set to a higher temperature.
Refrigerator thermistor.
Refrigerator
compartment
Air door stuck open or
too cold.
inoperative.
Air door seal missing or damaged. Repair or replace seal.
Main PC board.
Freezer control set too warm.
Freezer thermistor.
Freezer
Evaporator fan motor not
compartment
running.
too warm.
Condenser fan motor not running.
Frost blocking evaporator.
Freezer control set too cold.
Refrigerator operating in the
Freezer
Max Cool or Automatic Max Ice
compartment
Mode (see page 3-5).
too cold.
Freezer thermistor.
No evaporator fan motor
feedback.
Main control board is over
temperature.
Refrigerator over 48°F or
"Call Service" icon lights
freezer over 15°F for 3 hours.
and/or alarm is activated.
Both thermistors failed.
No feedback from evaporator fan
motor.
Refrigerator runs
Normal.
too long.
Unit is set for Holiday Mode.
No temperature display,
no interior lights.
Either door open for over 10
minutes.
POSSIBLE CAUSE
See "Component Testing" section for main PCB test procedure.
Check connections and repair as needed.
See "Component Testing" section for compressor/inverter test procedure.
See "Component Testing" section for compressor/inverter test procedure.
Set to a lower temperature.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
Look for ice or other blockage in air door. Run diagnostics test to operate air
door.
Run diagnostics test to operate the evaporator fan motor. Check for a
blocked fan blade and repair as necessary. Check for 5-17vdc from pin P7-9
to P7-10. If voltage is correct, replace the motor.
Check air door outlet and air returns for blockage.
See "Freezer compartment too warm."
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
Look for ice or other blockage in air door. Run diagnostics test to operate air
door. Check for proper DC input voltage. If voltage is normal and door will
still not operate, replace air door.
Run diagnostics test to operate air door.
Set to a lower temperature.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
Run diagnostics test to operate the evaporator fan motor. Check for a
blocked fan blade and repair as necessary. Check for 5-17vdc from pin P7-9
to P7-10. If voltage is correct, replace the motor.
Check for a blocked fan blade and repair as necessary. See "Component
Testing" section for condenser fan motor test procedure.
Run diagnostics test to operate defrost system. Test defrost heater and bi-
metal.
Set to a higher temperature.
Normal operation.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
The fan motor will run at 3000 rpm.
Look for blocked condenser air flow or inoperative condenser fan motor.
Run diagnostics and test operation of all components.
Run diagnostics and test thermistors and thermistor leads.
Run diagnostics and test fan motor and/or wiring.
It is designed for this refrigerator to run almost constantly at the lowest
possible compressor speed. Starting and stopping the compressor uses
more power than continuous low rpm operation. Instruct customer.
Press the Holiday Mode key to cancel operation.
Close door and/or check door switches.
TEST PROCEDURE-ACTION