Component Functions - Hotpoint MSZ802DF Service Information

Indesit Company

COMPONENT FUNCTIONS

General Information
The power module is made up of a number of smaller individual modules (sections), each one
controlling a functional component. The modules are linked together when required to control a
particular function or functions. The linking of the individual modules is optional and therefore allows for
each module to be switched ON or OFF, this is determined from the data stored or collected by the
modules and the results of module comparisons.
The power 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.
Fridge & Freezer Control
The power module monitors the fridge and freezer air sensors, comparing their sensor resistance
values 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 power module will enable normal operation provided there is no malfunction condition.
Fridge or Freezer Malfunction Module
The fridge or freezer malfunction module enables the appliance to continue operating in the unlikely
hood of the fridge or freezer sensors failing. Pre-set timed functions stored in the modules memory is
used to cycle cold request on and off.
A malfunction occurs when the fridge or freezer cabinet sensors return 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 above 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 modules memory after a compressor start/stop.
The fan will not operate when in the defrost cycle.
After the defrost cycle the fan starts after a timed interval following a compressor start, this interval is
also parameterised in the modules memory; this interval is different from the interval programmed for
normal operating conditions.
Electronic Motorised 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 in the top left hand (SX) corner of the fridge compartment. It is controlled by a
fridge air sensor (thermistor) positioned in the centre of the rear wall of the fridge. Cold air from the
evaporator is distributed in the refrigerator compartment.
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Service Manual UK English
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