Independent Operation Of The Cooler / Freezer; Normal Operation Characteristics, But Different Of Previous Models; Features Abnormal Operation (Incorrect Operation); Adaptive Defrosting - mabe PSS21 Series Service Manual

Independent Operation of the Refrigerator / Freezer
In previous models, the chiller and freezer compartment
components worked at the same time. When the cooler
compartment asked for cold air, the components of the
freezer compartment worked with the components of the
cooler compartment. This
no Independent.
In this model, the components of the compartment of
the cooler they can operate without the operation
of the components of the freezer compartment. This is called
independent operation.
Normal Operating Characteristics that may
Occur, but Different from Previous Models
•
The ice machine's drill rotates in the direction of the
hands of the clock.
•
The evaporator fan operates without the compressor or
condenser fan. Refrigerator fan is switched on.
•
Post Rest (adaptive defrost), compressor fan and condenser
on with the evaporator fan off after the defrost cycle.
•
Lining Protection Mode, fans come on when doors open
for 3 minutes.
•
When the doors open, the fans turn off.
•
There is no air flow to the cooler compartment when the
evaporator fan is on.
•
The evaporator and compressor fan can operate
continuously for 8 hours.
•
The fans change speeds, different levels of sound can be
noticed when this happens.
•
Quick Ice Mode, the evaporator fan works for 48 hours
without stopping.
•
Response time for drastic temperature changes is 2 to 10
minutes. The main control board will only respond to 8
degrees of temperature change per minute as determined by
the change of resistance of thesensor.
is called operation
Abnormal Operation Characteristics (Incorrect
Operation)
•
Cooler fan on and evaporator fan off.
•
Evaporator fan on, cooler fan and compressor off,
and damper closed.
•
Quick changes in fan speed, the fan takes at least 1
minute to change speeds.
•
The compressor running without the condenser
fan. The
fan forever must of functional to the same weather.
•
The condenser fan running without the
compressor. The compressor and condenser fan
should always work at the same time.

Adaptive Defrosting

Adaptive defrosting can be described as a defrosting system
that adapts to the environment around the refrigerator and the
use of the home.
Unlike traditional defrosting systems that use
electromechanical timers with a
Fixed defrost cycle time, adaptive defrost uses intelligent
electronic control to determine when the defrosting cycle is
necessary. In order to achieve the correct defrosting time
cycle, the main control board monitors the following cooler
operations:
•
Length of time when the refrigerator doors were
opened since the last defrost cycle.
•
Length of time that the compressor has operated
since the last defrost cycle.
•
Amount of time that the defrost heaters were on since
the last cycle of defrosting.
•
Adaptive defrosting is divided into separate
cycles. These operations are:
•
Cooling operation Pre-cooling
operation
•
Defrosting Heater Operation Rest Period
•
Post Break
See Pub # 31-9062 for more information on
Defrosting Adaptable
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compressor and condenser