Help library: Help library: [LG Air Conditioner Heating] While It says defrosting or pre heating in progress, heating is failed. Heating stops

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<div class="content-service-view">
        <p class="info-desc txt-idt">
            1. Pre heating function is used to make sure that there is no cold wind coming out by raising the
            temperature of the pipe for the indoor unit when starting heating in the early phase.</p>        <p class="info-desc txt-idt">
            2. Defrosting function is to melt frosts formed due to reducing temperature of the outdoor unit during
            heating operation.
        </p>        <p class="txt-idt">※ Both pre heating and defrosting functions are normally operated to facilitate heating, so
            rest assured when you use it.</p>        
<h2 class="tit">Try this</h2>
        
<h3 class="sub-tit">How to check</h3>
        <p class="txt-idt">1. During pre heating/defrosting operation, the pre heating/defrosting LED lamps are lit.</p>        <p class="txt-idt">
            2. When entering the defrosting mode, the air conditioner briefly performs cooling operation to generate hot
            wind from the outdoor unit to melt frosts on the outdoor unit.<br>
            Now, in order to make sure there is no cold wind from the indoor unit, the indoor unit does remains off, and
            by minimizing the vane angle, generation of cold wind is prevented.
        </p>        
<div class="img-only">
            <img alt="Heating operation air conditioner blade angle and defrost/preheating operation blade angle" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=KjJguOTYZhfJMjyqOyVVQ&amp;portalId=P1">
        </div>
        
<h3 class="sub-tit">[Occurring in early phase of heating operation] Pre heating</h3>
        <p class="info-desc"><strong>Step 1.</strong> Pre heating operation to raise the temperature of the pipe for the indoor unit</p>        <p>
            During heating, it circulates warm refrigerant to the indoor to raise the pipe temperature and then start
            heating, thus there is no wind immediately.<br>
            If the surrounding temperature of the outdoor unit drops below -15°C(5℉), preheating might take longer than
            usual or lukewarm wind can come out.
        </p>        <p class="info-desc"><strong>Step 2.</strong> Pre heating displays when the indoor temperature reaches the target temperature</p>        <p>If the indoor temperature is higher than the target temperature, the wind will stop and the product is in
            waiting mode of pre heating.</p>        
<h3 class="sub-tit">[Occurring during heating operation] Defrosting</h3>
        <p class="info-desc"><strong>Step 1.</strong> Defrosting operation to melt ice of the evaporator for the outdoor unit</p>        <p>
            As opposed to cooling operation, during heating operation, the indoor unit generates hot wind and the
            outdoor unit generates cold wind.<br>
            Moisture from the air adheres to the cooled evaporator of the outdoor unit, thus forming ice, and in order
            to prevent degradation of the cooling performance due to freezing in the evaporator for the outdoor unit,
            defrosting operation starts.
        </p>        <p class="info-desc"><strong>Step 2.</strong> Defrosting operation to prevent ice forming of the evaporator for the outdoor unit
        </p>        <p>It is possible for defrosting operation to start automatically due to internal freezing or the pipe
            temperature that is not checked externally.</p>        
<div class="img-only">
            <strong>Frost occurs in the outdoor unit</strong><br>
            <img alt="The appearance of frost on the outdoor unit" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=Ian70aRXtbUVGm7UKYOnLg&amp;portalId=P1">
        </div>
        
<div class="img-only">
            <strong>During defrosting operation</strong><br>
            <img alt="During the defrosting operation, the frost melts, steam is generated, and water drips." src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=j0zW33Rkbft1X2AiNcg&amp;portalId=P1">
        </div>
        
<div class="img-only">
            <strong>Defrosting completed</strong><br>
            <img alt="Normal operation after defrosting is complete" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=DcK4A2C8CQ6znYNGGK6osg&amp;portalId=P1">
        </div>
        <p><strong>[Air conditioner operation status during defrosting]</strong></p>        
<div class="tbl-scroll">
            <table style="width: 500px; border-collapse: collapse;" class="xfe_just_info">
                <caption>Air conditioner operation status during defrosting</caption>
                <thead>
                    <tr>
                        <th scope="col">Defrosting/preheating in progress</th>
                        <th scope="col">Stand type air conditioner</th>
                        <th scope="col">Wall mounted type air conditioner</th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <th scope="row">Display</th>
                        <td>
                            <p>Defrosting/pre heating display</p>                        </td>
                        <td>
                            <p>Defrosting/preheating LED lit</p>                        </td>
                    </tr>
                    <tr>
                        <th scope="row">Indoor fan</th>
                        <td>
                            <p>OFF</p>                        </td>
                        <td>
                            <p>OFF</p>                        </td>
                    </tr>
                    <tr>
                        <th scope="row">Indoor unit louver</th>
                        <td>
                            <p>Setting status</p>                        </td>
                        <td>
                            <p>Closed</p>                        </td>
                    </tr>
                    <tr>
                        <th scope="row">Outdoor fan</th>
                        <td>
                            <p>OFF</p>                        </td>
                        <td>
                            <p>OFF</p>                        </td>
                    </tr>
                    <tr>
                        <th scope="row">Compressor for the outdoor unit</th>
                        <td>
                            <p>ON</p>                        </td>
                        <td>
                            <p>ON</p>                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
        <p class="mobile-txt"> Move left or right to check the contents.</p>        <p class="help-txt">This guide was created for all models, so the images or content may be different from your
            product.</p>    </div>

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[LG Air Conditioner Heating] While It says defrosting or pre heating in progress, heating is failed. Heating stops

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