Help Library: Help Library: [LG Air Conditioner Noise][Outdoor Unit] There is a very high frequency beeping noise heard

[LG Air Conditioner Noise][Outdoor Unit] There is a very high frequency beeping noise heard

Troubleshooting Commercial Air Conditioners 16/06/2025

Difference between the indoor temperature and the target temperature Compressor for the outdoor unit Outdoor unit sounds
Difference between the indoor temperature and the target temperature	Compressor for the outdoor unit	Outdoor unit sounds
Loud	High speed operation	Loud
Low	Low speed operation	Low

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<p class="info-desc">
            If the difference between the indoor temperature and the target temperature is big, then during initial operation, as the motor rotation count is set to very high, <br>
            thus high fine frequency noises can be heard.<br>
            Once the indoor temperature reaches the target temperature, noises from the outdoor unit including high frequency noises will be reduced.
        </p>        
<h2 class="tit">Causes and Symptoms</h2>
        
<ul class="cause-list">
            
<li>During initial operation, or when you lower the target temperature, intermittent high frequency noises are heard for some time.</li>
        </ul>
        
<div class="img-only">
            <img alt="Graph of noise reduction when room temperature reaches a set temperature" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=bKStcOZOZ0fBNC9OzCJA&amp;portalId=P1">
        </div>
        
<div class="tbl-scroll">
            <table style="width: 300px; border-collapse: collapse;" summary="Difference between the indoor temperature and the target temperature Compressor for the outdoor unit Outdoor unit sounds">
                <caption>Difference between the indoor temperature and the target temperature Compressor for the outdoor unit Outdoor unit sounds</caption>
                <thead>
                    <tr>
                        <th scope="col">Difference between the indoor<br>
                            temperature<br>
                            and the target temperature
                        </th>
                        <th scope="col">Compressor for the outdoor<br>
                            unit
                        </th>
                        <th scope="col">Outdoor unit<br>
                            sounds
                        </th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td>
                            <p>Loud</p>                        </td>
                        <td>
                            <p>High speed operation</p>                        </td>
                        <td>
                            <p>Loud</p>                        </td>
                    </tr>
                    <tr>
                        <td>
                            <p>Low</p>                        </td>
                        <td>
                            <p>Low speed operation</p>                        </td>
                        <td>
                            <p>Low</p>                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
        <p class="mobile-txt">Move left or right to check the contents.</p>
        
<h2 class="tit">Try this</h2>
        
<h3 class="sub-tit">Increase the target temperature for use.</h3>
        <p>
            Depending on the difference between the indoor temperature and the target temperature, the number of outdoor motor rotations gets high.<br>
            Set it to less than 3℃.<br>
            If you set the target temperature too low, then the power consumption will be high and it is likely for you to get an air-conditioningitis due to a high temperature difference.
        </p>        
<div class="img-only">
            <img alt="Set the setting temperature to 25 degrees" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=gqef1gSXAVruEo32tCFeHg&amp;portalId=P1">
        </div>
        <p>※ High frequency noises from the air conditioner can be temporary or intermittent but if it is consistent enough to cause discomforts in use, <br>
            then it requires inspection by a professional service manager.
        </p>
        <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 Noise][Outdoor Unit] There is a very high frequency beeping noise heard

Causes and Symptoms

Try this

Increase the target temperature for use.

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