Frost Free Refrigerator Led lamp flashing
Refrigerator Repairs in Africa
Lately we have been receiving a lot of calls for Frost Free Refrigerator that has a LED light flashing, which is also a indication that something is wrong with the refrigerator temperature .
One of the most common and visible symptom is that the fridge section stops cooling.
One of the most common and visible symptom is that the fridge section stops cooling.
Frost Free
Refrigerators make use of the "chill-factor-principal" to cool the air and also freezing stuff inside the Freezer Compartment. This means you have to
have air-movement all the time inside the refrigerator. To create these ideal cooling conditions inside the refrigerator you need a couple of components to work together.
Main 4 Components needed to achieve the chill –factor
1.
Evaporator
2.
Blower (fan)
3.
Air movements
4.
Timer
Evaporator
Refrigerant is
circulated through the evaporator unit by the compressor causing the evaporator
to Ice-up. (Cold source)
Blower
The fan sucks hot
air through the evaporator unit and blows cold air out the other side (into freezer and fridge compartments)
Air movement
This where the real magic is - the "chill-factor". If one
can get cold air to move it will become even colder. (Like the southeaster wind in the Cape) The principal is simple but
if something like a piece of ice or food partial interfere with the movement of
air inside your refrigerator then all kinds of bad things start to happen
That was the short version of the cooling working of the Frost Free Refrigerator now we will cover the heating section of the frost free refrigerator - this side is almost as important as the cooling section.
The heating section is to help the refrigerator's defrosting control module from not developing an ice buildup.
The heating section is to help the refrigerator's defrosting control module from not developing an ice buildup.
Components needed for Defrosting
1.
Heater Element
2. Micro heating temperature Controller
3. Timer
4.
Main Refrigerator Controller
Heater Elements
The heater elements
are mounted against the evaporator unit, which is made from aluminum.
Aluminum is a great heat exchanger so when the heater gets turned on it melts
the ice on the evaporator in seconds.
Micro temp Controller
This little pouch of
components controls the heat temperature while the heater is turned on.
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| Defrosting timer |
Timer
Timer unit controls
the defrosting cycle. In other words how many times the elements should come on
like every 6 hours or every 8 hours. Most modern fridge do not have separate timers in them. The older Defy and Whirlpool refrigerator model has them but the newer Samsung, Bosch and Lg refrigerator Refrigerator gets control controlled from the main Pc circuit module
The main refrigerator controller
The main purpose of
the electronic controller is to have all these gadgets and parts working together in perfect harmony.
In a
next post I will cover more about the trouble shooting of the frost free refrigerators.
Cheers!
Related post to check out; http://highpointappliances.blogspot.co.za/2011/06/refrigerator-not-cooling.html
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| 083 52 52 52 2 |
Related post to check out; http://highpointappliances.blogspot.co.za/2011/06/refrigerator-not-cooling.html