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Adaptive Defrost (Dwell Period)
After defrost heater operation has been
terminated by the main control board, a 5-
minute dwell period occurs. During this period,
the compressor, condenser fan, and the
evaporator fan remain off. The remaining frost
melting from the evaporator will continue to drip
and drain so that prior to the cooling operation,
the evaporator will be totally clear of any
moisture. After the 5-minute dwell period, the
unit goes into post dwell.
Adaptive Defrost (Post Dwell)
The post dwell period is designed to cool the
evaporator before circulating air within the
refrigerator. This prevents any residual heat on
the evaporator from being distributed in the
freezer. During this period, the compressor is on
and the condenser fan is on, but the evaporator
fan is off. Post dwell will last 15 minutes or until
the evaporator temperature reaches 30°F on
these models.
Normal Operating Characteristics That
Are Different from Previous Models
•
Evaporator fan running without compressor
or condenser fan.
•
Post Dwell (Adaptive Defrost), compressor,
and condenser fan on with evaporator fan off
after defrost cycle.
•
Liner Protection Mode, fan comes on when
the doors are open for 3 minutes.
•
Evaporator fan and compressor can run
continuously for 2 hours (Adaptive Defrost).
•
Different sound levels can be heard when
the fan changes speed.
•
Response time for drastic temperature
change is 2 to 10 minutes. The main control
board will only respond to 8 degrees
(Fahrenheit) of temperature change per
minute as determined by resistance of
sensor.
Abnormal Operating Characteristics
(Incorrect Operation)
•
Rapid fan speed changes, fan takes at least
1 minute to change speeds.
•
Compressor running without the condenser
fan. The compressor and condenser fan
should always run at the same time.
Liner Protection Mode
The liner protection mode will activate if either of
the doors have been open for 3 minutes. This
mode will start the evaporator fan on high
speed.
This mode is controlled by 2 timers. Timer 1
monitors door-open time. A 3-minute door-open
count begins when the door is opened. If 3
minutes elapse before the door is closed, the
liner protection mode will become active. Once
the door is closed, timer 1 resets and liner
protection mode goes into standby. In standby,
normal fan and damper operations resume and
timer 2 begins a 3-minute door-closed count. If
3 minutes elapse without a door opening, liner
protection mode will completely deactivate. If a
door is opened within the timer 2 door-closed
count, the remaining time in the door-closed
count will be deducted from the timer 1 door-
open count.
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