Help library: Help library: [LG air conditioner cooling] Cooling cannot be selected. Cooling has disappeared

[LG air conditioner cooling] Cooling cannot be selected. Cooling has disappeared

Repair Multi Split, Single Split, Ventilation 08/13/2025

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        <p class="info-desc">
            The mode of a ceiling mounted air conditioner that uses multiple units at the same time must be matched to
            either cooling or heating.<br>
            The inability to select either cooling or heating is a symptom that occurs because all air conditioners in
            use are not matched to either cooling or heating.<br>
            Rest assured, it is not a product defect, so it will operate normally if you do as follows:
        </p>        
<h2 class="tit">Try this</h2>
        
<h3 class="sub-tit">How to solve the problem when using the wireless remote control</h3>
        <p>
            Press the Start/Stop button on the remote control to turn off all indoor units of the air conditioner.<br>
            Wait approximately 5 minutes and then set either cooling or heating operation on all indoor units in order
            to ensure normal operation.
        </p>        <p class="txt-idt">※ If all relevant indoor units are not set to either cooling or heating when you switch to
            cooling using the wireless remote control, a buzzer will sound 5 times.</p>        
<h3 class="sub-tit">How to solve the problem when using the wired remote control</h3>
        <p>
            Press the Start/Stop button on the remote control to turn off all indoor units of the air conditioner.<br>
            Stop all air conditioners, then turn on all air conditioners, starting from an air conditioner where cooling
            could not be selected.
        </p>        
<div class="img-only">
            <img alt="1. Heat 2. Heat 3. Cool Not selected" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=UqaSe66PR7vpWFAKvjJfFQ&amp;portalId=P1">
        </div>
        
<h3 class="sub-tit">If a central controller is used</h3>
        <p>
            Check if the central controller is partly or wholly locked.<br>
            Unlock the central controller functions individually or wholly. (Ask the person in charge to unlock the
            central controller of the PC.)<br>
            If you set the central controller not to control each room separately, a warning message [HL] will appear on
            the wired remote control of the indoor unit.
        </p>        <p class="txt-idt">※ Central controller: A device that allows the management office to remotely control
            cooling/heating devices in buildings such as schools or places of business.</p>        
<div class="img-only">
            <img alt="A warning message [HL] appears on the wired remote controller." src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=Hi9CWxghONylImKuOb2Mbg&amp;portalId=P1">
        </div>
        <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 cooling] Cooling cannot be selected. Cooling has disappeared

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