Electronic Control System
3-24
#7019014 - Revision A - October, 2010
Built-In (BI) Series
Built-In (BI) Series
Monitor and Control Refrigerator Fan-Assisted, Off-Cycle Defrost
Temperature signals from the refrigerator compartment and evaporator thermistor’s are observed by the micro-
processor. During the off cycle defrost, if the refrigerator compartment temperature reaches high offset (calling for
cooling) before the evaporator temperature rises to 38°F (3°C), no power will be supplied to the compressor, but the
evaporator fan will be switched ON. Only after the evaporator temperature reaches 38°F (3°C) will the compressor
be energized. (See Figure 3-42).
NOTES:
• if the compartment thermistor
detects temperatures below
35°F (2°C), the defrost time
is extended slightly to avoid
freezing temperatures in the
drawer area.
• If the refrigerator compart-
ment thermistor is faulty, the
refrigerator compressor
defaults to 20 minutes ON,
40 minutes OFF cycling, EE
appears at right in LCD, the
service icon flashes and the
appropriate fault code is
logged.
• If the refrigerator evaporator
thermistor is faulty, the refrig-
erator compressor will not
energize until compartment
air temperature exceeds high
offset by 5°F (3°C); the serv-
ice icon flashes and the
appropriate fault code is
logged.
• If in Sabbath Mode, the com-
partment thermistor still con-
trols compressor operation,
except that when high offset
is reached, there is a random
15 to 25 second delay before
the cooling cycle is started.
N.O.
N.C.
N.C.
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