Electronic Control System
600 Series
(Prior to #1810000)
3-16
#3756270 - Revision B - January, 2006
DIAGNOSTIC MODE SEQUENCE
For the models 611, 632, 642, 650 and 690, the diagnostic mode sequence is:
First: (“F”) Freezer Compartment
Second: (“r”) Refrigerator Compartment
Third: (“rE”) Refrigerator Evaporator
Fourth: (“FE”) Freezer Evaporator
Fifth: (“IL”) Inactive Line
For the model 601R, the diagnostic mode sequence is:
First: (“r”) Refrigerator Compartment
Second: (“rE”) Refrigerator Evaporator
For the model 601F, the diagnostic mode sequence is:
First: (“F”) Freezer Compartment
Second: (“FE”) Freezer Evaporator
Third: (“IL”) Inactive Line
Keeping these sequences in mind, it is not necessary to press the UNIT ON/OFF key to display the location each
time after a COLDER key stroke. Pressing the COLDER key successively will display the readings in sequence,
bypassing location display. Then, if location is unknown, press the UNIT ON/OFF key.
NOTE: The electronic control will exit diagnostic mode ten seconds after the last key stroke.
NOTE: Always recheck set-points after performing diagnostic mode procedures.
Figure 3-36. Press UNIT ON/OFF Key to Display Location of Thermistor
Thermistor Error Indicator
1. While in diagnostic mode, If “EE” is displayed in place of a temperature reading, the thermistor in that location is
either faulty or the electrical line is separated. (In this example, the refrigerator evaporator thermistor is faulty.)
(See Figure 3-35)
2. Press the UNIT ON/OFF key at this time to determine which thermistor is faulty or line separated. ( In this
example, the refrigerator evaporator thermistor is faulty.) (See Figure 3-36)
NOTE: The electronic control will exit diagnostic mode ten (10) seconds after the last key stroke.
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