COMPONENT FUNCTION
General Information
The temperature control module is made up
of
a number
of
smaller individual sections, each one
controlling a function. The sections are linked together when required to control a particular function
or functions.
The control module memory stores information such as temperatures and times.
Having individual set
of
parameter values built
in
to
it,
directly aimed at providing the specific control
needs for the physical and system characteristics of the model type.
Freezer Control
The control module monitors the freezer air sensor, comparing the sensor resistance value with the
cut-in and cut-out parameter values stored
in
its memory.
Although the parameters are set, they allow for adjustment within those parameters so that the user
has control. The results from the comparisons will determine if cooling is initiated, other circuits
of
the
module will also use the results.
The control module will enable normal operation provided there
is
no malfunction condition.
Freezer Malfunction Module
The freezer malfunction module enables the appliance to continue operating
in
the unlikely event
of
the freezer air sensor failing. Pre-set timed functions stored
in
the module are used to cycle cold
request
on
and off.
A malfunction occurs when the freezer cabinet air sensor returns a value to the module
of
either Open
or Closed circuit, rather than a particular resistance value.
Evaporator Fan Module
The freezer fan
is
located
in
front
of
the evaporator coil and
is
designed to distribute the cold air
produced
by
the evaporator coil uniformly inside the freezer compartment and when necessary
in
the
fridge compartment.
The freezer fan
is
managed by the module and is switched on/off after a preset time interval that is
parameterised
in
the module after a compressor start/stop.
The defrost procedure
is
preceded
by
activation
of
the fan for a timed interval that is parameterised
in
the module memory. The fan will not operate when
in
the defrost cycle.
After the defrost cycle the fan starts after a time interval following a compressor start, this interval
is
also parameterised
in
the module memory; this interval is different from the interval programmed for
normal operating conditions.
Mechanical Damper Assembly (Baffle)
The purpose
of
the damper
is
to allow the cold air produced by the evaporator to be distributed inside
the refrigerator compartment.
The damper is located behind the fridge multi-flow unit. It
is
controlled by a mechanical thermostat
who's phial
is
positioned into the exhaust (return) duct connecting the evaporator to the damper.
Cold air from the evaporator is distributed
in
the refrigerator compartment by openings
on
the
multiflow unit.
The thermostat can be adjusted to the required temperature setting by means
of
a control knob
mounted
in
the front of the multi-flow unit. (See the Air Flow Diagram on page 12.)
NOTE:
To
prevent premature opening I closing of the damper, it is essential that the
thermostat phial is positioned to the back
of
the return (exhaust) duct.
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