This article explains why your appliance may not be operating or responding.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains why your appliance may not be operating or responding.&#xA0;</p><h2 id="possible-causes"><u>Possible Causes</u></h2><ul><li>Power failure.&#xA0;</li><li>The plug is pulled out or tripped.&#xA0;</li><li>The wrong wiring and breaker is being used.&#xA0;</li><li>The fan motor of the indoor or outdoor unit is damaged.&#xA0;</li><li>There is a faulty compressor or thermomagnetic circuit breaker.&#xA0;</li><li>There is a faulty protective device or fuses.&#xA0;</li><li>The electrical connections are loose.&#xA0;</li><li>The system has entered a protection mode.&#xA0;</li><li>The system has entered an overvoltage or undervoltage protection.&#xA0;</li><li>The Timer-On function is active.&#xA0;</li><li>The electronic control board was damaged.&#xA0;</li><li>The remote controller may not be close enough to the indoor unit.&#xA0;</li><li>The batteries of the remote controller may need to be replaced.&#xA0;</li><li>There are obstacles between the remote controller and indoor unit signal receiver.&#xA0;</li></ul>

Find Out Why the Appliance is Not Operating or Responding

This article explains why the LED display for your system is off.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains why the LED display for your system is off.&#xA0;</p><h2 id="possible-causes"><u>Possible Causes</u></h2><ul><li>The Display button has been pressed, causing the system to turn off.&#xA0;</li><li>There has been a power failure.&#xA0;</li></ul>

Find Out Why the LED Display is Off

This article explains why your system's insufficient, and the air is not hot or cold enough.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains why your system&apos;s insufficient, and the air is not hot or cold enough.&#xA0;</p><h2 id="possible-causes"><u>Possible Causes</u></h2><ul><li>The temperature setting is unsuitable.&#xA0;</li><li>The air conditioner takes and outlets may be obstructed.&#xA0;</li><li>The air filter may be dirty.&#xA0;</li><li>The fan speed may be set at the minimum.&#xA0;</li><li>There may be too many other heat sources in the room.&#xA0;</li><li>The system may be getting low on refrigerant. Pressures should be checked.&#xA0;</li></ul>

Find Out Why the System's Airflow is Insufficient

This article provides solutions to resolve problems where the indoor unit is not turning on.

<h2 id="introduction"><u>Introduction</u></h2><p>This article provides solutions to resolve problems where the indoor unit is not turning on.&#xA0;</p><h2 id="solutions"><u>Solutions</u></h2><ul><li>Try the Manual (Emergency) button on the indoor unit in order to rule out problems with the remote controller.&#xA0;</li><li>Verify that the wire order is equal between the indoor and outdoor units. The color order must match. Check for splices or damage on the control cable. To rule out variables, remove any accessorial items, such as UV lights or condensate pumps, until the problem is solved.&#xA0;</li><li>Solution for 230V Systems: Use a multimeter to check the AC voltage across terminals L1-L2 on the outdoor system. Touch one probe to L1, the other probe goes on L2. Do not measure each leg to ground. Verify whether the reading is between 208-253 VAC.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120420-eec2e3f2-4208-4c44-997b-ef1b9ab8d40a-wyt17_ac_voltage_terminals.png" style="width: 300px;" class="fr-fic fr-dib fr-bordered"><ul><li>If the reading is between 208-253 VAC, measure whether the reading is the same across 2-3 on both the outdoor and indoor units. All readings must match. The system must receive a full 230V reading in order to function.&#xA0;</li><li>If the reading is 0 VAC, then the system is not receiving proper power from the power source. Some common reasons are:&#xA0;<ul><li>A fused disconnect is being used, but fuses are blown and not inserted properly.&#xA0;</li><li>The disconnect box bus-bar is off.&#xA0;</li><li>A double-pole breaker is not being used. Single or tandem breakers will not operate.&#xA0;</li></ul></li></ul></li></ul>

Solutions for the Indoor Unit Not Turning On

This article provides a solution for pressure readings that do not rise when releasing refrigerant during leak checks.

<h2 id="introduction"><u>Introduction</u></h2><p>This article provides a solution for pressure readings that do not rise when releasing refrigerant during leak checks.</p><h2 id="solution"><u>Solution</u></h2><p>Verify that the gauge tube pin on the manifold gauge is fully engaging the outdoor unit service port&apos;s Schrader valve. A pin that is over or underexposed will not allow the gauge to access the refrigerant circuit, preventing pressure measurement and/or proper vacuuming. The depressor pin inside the hose connector is adjustable for proper Schrader valve engagement.&#xA0;</p><p>A telltale sign that this is happening is whether the gauge reading goes to instant vacuum when the pump is first turned on. This means only the gauge is being vacuumed. If so, vacuuming will need to be re-performed, since only the gauge itself was vacuumed.&#xA0;</p>

Solution for Pressure Readings Not Rising When Releasing Refrigerant During Leak Checks

This article provides a solution for systems indicating that a refrigerant leak is present.

<h2 id="introduction"><u>Introduction</u></h2><p>This article provides a solution for systems indicating that a refrigerant leak is present.&#xA0;</p><h2 id="solution"><u>Solution</u></h2><p>Follow these steps to fix systems indicating that a refrigerant leak is present:&#xA0;</p><ol><li>Cut off the power to the system.&#xA0;</li><li>Prepare a soapy water spray and spray the connection points of the lineset. The point where the bubbles form is where the leak is located.&#xA0;</li><li>Tighten the connection.&#xA0;</li><li>Re-test the system.&#xA0;</li><li>After the leak is repaired, re-charge the system.&#xA0;</li></ol>

Solution for Systems Indicating that a Refrigerant Leak is Present

This article provides solutions for systems unable to hold a vacuum.

<h2 id="introduction"><u>Introduction</u></h2><p>This article provides solutions for systems unable to hold a vacuum.&#xA0;</p><h2 id="solutions"><u>Solutions</u></h2><ul><li>A leak in the gauge hoses is likely. Repair the leak and check the vacuum pump.&#xA0;</li><li>Check the connection points for proper contact and torque, then tighten if necessary.&#xA0;</li></ul>

Solutions for Systems Not Holding A Vacuum

You can operate the indoor unit without a remote controller for emergencies by using the emergency manual button.

<h1 id="can-i-operate-the-indoor-unit-without-a-remote-control">Can I operate the indoor unit without a remote control?</h1><p>Yes. You can operate the indoor unit without a remote controller for emergencies by using the emergency manual button. The emergency manual button is located in different locations based on the system.</p><h2 id="where-to-find-the-emergency-manual-button"><u>Where to find the Emergency Manual Button</u></h2><p><strong>High Wall-Mounted Systems (WYT-17, WYT-20, WYT-24, WYT-25, WYT-FA):</strong> The emergency manual button for high wall-mounted systems is located on the terminal block cover of the unit under the front panel. Open and lift the front panel up at an angle to gain access to the emergency manual button.<span class="fr-img-caption fr-fic fr-dib fr-bordered" style="width: 412px;"><span class="fr-img-wrap"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025112416-8d5c9fc1-8224-45d4-91c5-344e36089f43-wyt17_emergency_button.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"><span class="fr-inner">Emergency manual button for High Wall-Mounted systems</span></span></span></p><hr><p><strong>Ceiling Cassette Systems (CYT-24):&#xA0;</strong>The emergency manual button for ceiling cassette systems is located on the primary interface module on the unit&apos;s front panel. Open and lift the front panel up at an angle to gain access to the emergency manual button.&#xA0;<span class="fr-img-caption fr-fic fr-dib fr-bordered" style="width: 412px;"><span class="fr-img-wrap"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025112416-ea423b0b-4e6d-4c7b-af5d-7943e7300336-cyt24_emergency_manual_button.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"><span class="fr-inner">Emergency manual button for Ceiling Cassette systems</span></span></span></p><hr><p><strong>Ducted Ceiling Concealed Systems (RYT-24):&#xA0;</strong>The emergency manual button for ducted ceiling concealed systems is located on the display module that is wired to the air handler.&#xA0;<span class="fr-img-caption fr-fic fr-dib fr-bordered" style="width: 412px;"><span class="fr-img-wrap"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025112416-3ef28f24-dc2b-4431-a281-c1b4e234185c-ryt24_emergency_manual_button.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"><span class="fr-inner">Emergency manual button for Ducted Ceiling Concealed systems</span></span></span></p><hr><p><strong>Floor-Ceiling Flex Systems (UYT-24):&#xA0;</strong>The emergency manual button is located on the front panel of the unit on the primary interface manual. Open and lift the front panel up at an angle to gain access to the emergency manual button.&#xA0;<span class="fr-img-caption fr-fic fr-dib fr-bordered" style="width: 412px;"><span class="fr-img-wrap"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025112416-3487b3d2-62f0-4a9d-b63c-b734bf59207d-uyt24_emergency_manual_button.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"><span class="fr-inner">Emergency manual button for Floor-Ceiling Flex systems</span></span></span></p><h2 id="options-available"><u>Options Available</u></h2><p>The following options are available for all systems when using the emergency manual button:&#xA0;</p><ul><li style="font-size: 14px;">Press the manual button once to start the unit in Cooling mode.&#xA0;</li><li style="font-size: 14px;">Press the manual button twice within 3 seconds to start the unit in Heating mode.&#xA0;</li><li style="font-size: 14px;">Press the manual button three times within 5 seconds to turn off the unit.</li></ul>

Use the Emergency Manual Button to Operate the Indoor Unit Without a Remote Control

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