Filter
Top Products
6-3
TROUBLESHOOTING CHART
PROBLEM POSSIBLE CAUSE TEST PROCEDURE-ACTION
No DC control voltage from main
PCB to the inverter board.
See "Component Testing" section for main PCB test procedure.
Control voltage wires loose or
reversed.
Check connections and repair as needed.
Compressor. See "Component Testing" section for compressor/inverter test procedure.
Inverter board. See "Component Testing" section for compressor/inverter test procedure.
Refrigerator control set too
warm.
Set to a lower temperature.
Refrigerator thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Com
p
onent Testin
g
".
Air door stuck closed or
ino
p
erative.
Look for ice or other blockage in air door. Run diagnostics test to operate air
door.
Evaporator fan motor not
running.
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 volta
g
e is correct, re
p
lace the motor.
Blocked air flow. Check air door outlet and air returns for blockage.
Warm freezer compartment. See "Freezer compartment too warm."
Refrigerator control set too cold. Set to a higher temperature.
Refrigerator thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Com
p
onent Testin
g
".
Air door stuck open or
inoperative.
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 o
p
erate, re
p
lace air door.
Air door seal missing or damaged. Repair or replace seal.
Main PC board. Run diagnostics test to operate air door.
Freezer control set too warm. Set to a lower temperature.
Freezer thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Com
p
onent Testin
g
".
Evaporator fan motor not
running.
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 volta
g
e is correct, re
p
lace the motor.
Condenser fan motor not running.
Check for a blocked fan blade and repair as necessary. See "Component
Testin
g
" section for condenser fan motor test
p
rocedure.
Frost blocking evaporator.
Run diagnostics test to operate defrost system. Test defrost heater and bi-
metal.
Freezer control set too cold. Set to a higher temperature.
Freezer thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Com
p
onent Testin
g
".
No evaporator fan motor
feedback.
The fan motor will run at 3000 rpm.
Refrigerator runs
too long.
Normal.
It is designed for this refrigerator to run almost constantly at the lowest
possible compressor speed. Starting and stopping the compressor uses
more
p
ower than continuous low r
p
m o
p
eration. Instruct customer.
Freezer
compartment
too cold.
Condenser fan runs
but the compressor
will not start.
Freezer
compartment
too warm.
Refrigerator
compartment
too cold.
Refrigerator
compartment
too warm.