This article provides a troubleshooting and diagnosis table for wall-mounted, ceiling cassette, floor-ceiling flex, and ducted ceiling concealed systems.

<p>This article provides a troubleshooting and diagnosis table for wall-mounted, ceiling cassette, floor-ceiling flex, and ducted ceiling concealed systems.</p><p>This table for the following systems: &#xA0;</p><ul id="isPasted"><li><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-ceiling-cassette" target="_blank" rel="noopener noreferrer">Quantum Ultra Ceiling Cassette (CYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-ducted-ceiling-concealed" target="_blank" rel="noopener noreferrer">Quantum Ultra Ducted Ceiling Concealed (RYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-universal-flex-series" target="_blank" rel="noopener noreferrer">Quantum Ultra Floor-Ceiling Flex (UYT-24)</a></li><li id="isPasted"><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/multi-split-systems" target="_blank" rel="noopener noreferrer">Quantum Ultra Multi-Zone</a></li></ul><table style="width: 100%;" class="fr-table-selection-hover"><tbody><tr><td style="width: 30.4441%; background-color: rgb(239, 239, 239); text-align: center;" class="fr-thick"><strong>Malfunction</strong></td><td style="width: 69.5559%; background-color: rgb(239, 239, 239); text-align: center;" class="fr-thick"><strong>Possible Causes</strong></td></tr><tr><td style="width: 30.3725%; text-align: center;" rowspan="11" class="fr-thick ">If the appliance does not operate or respond</td><td style="width: 69.5559%;" class="fr-thick">There is a power failure</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The plug is pulled out or tripped</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The wrong breaker or wiring is being used</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The indoor or outdoor fan motor is damaged</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">There is a faulty compressor or thermomagnetic circuit breaker</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">There is a faulty protective device or fuses</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The electrical connections are loose</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The system has entered a protection mode</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The system has entered an overvoltage or undervoltage protection</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The Timer-On function is active</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The electronic control board was damaged</td></tr><tr><td style="width: 30.3725%; text-align: center;" class="fr-thick">If there are strange odors</td><td style="width: 69.5559%;" class="fr-thick">The air filter is dirty</td></tr><tr><td style="width: 30.3725%; text-align: center;" class="fr-thick">If there is running water</td><td style="width: 69.5559%;" class="fr-thick">There is a backflow of condensate water into the system&apos;s drain pan</td></tr><tr><td style="width: 30.3725%; text-align: center;" class="fr-thick">If a fine mist is coming from the air outlet</td><td style="width: 69.5559%;" class="fr-thick">This occurs when the air in the room becomes considerably cold.&#xA0;<br>For example, in &quot;Cooling&quot; or &quot;Dehumidification/Dry&quot; modes</td></tr><tr><td style="width: 30.3725%; text-align: center;" class="fr-thick">If strange noises are being emitted</td><td style="width: 69.5559%;" class="fr-thick">This noise is made by the expansion or contraction of the front panel due to variations in temperature. If so, this is normal</td></tr><tr><td style="width: 30.3468%; text-align: center;" rowspan="6" class="fr-thick">If the airflow is insufficient, and the air is not hold or cold enough</td><td style="width: 69.5559%;" class="fr-thick">The temperature setting is unsuitable</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The air conditioner intakes and outlets may be obstructed</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The air filter may be dirty</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The fan speed may be set at the minimum</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">There may be too many other heat sources in the room</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The system may be getting low on refrigerant. Pressures should be checked</td></tr><tr><td style="width: 30.3468%; text-align: center;" rowspan="3" class="fr-thick">If the appliance does not respond to commands</td><td style="width: 69.5559%;" class="fr-thick">The remote control may not be close enough to the indoor unit</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The batteries of the remote control may need to be replaced</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">There are obstacles between the remote control and indoor unit signal receiver&#xA0;</td></tr><tr><td style="width: 30.3468%; text-align: center;" rowspan="2" class="fr-thick">If the display is off</td><td style="width: 69.5559%;" class="fr-thick">The Display button has been pressed</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">There has been a power failure</td></tr><tr><td style="width: 30.3468%; text-align: center;" rowspan="6" class="fr-thick">Switch off the air conditioner immediately and cut off the power supply in the event of</td><td style="width: 69.5559%;" class="fr-thick">Strange noises not due to expansion/contraction are heard during operation</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The electronic control board is faulty or malfunctioning</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">Any fuses or switches are faulty or malfunctioning</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The sound of spraying water or objects are heard inside the appliance</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">The cables or plugs have overheated</td></tr><tr><td style="width: 69.5559%;" class="fr-thick">There are very strong odors being emitted from the appliance</td></tr></tbody></table><p><br></p>

Troubleshooting & Diagnosis Table

Learn how to resolve common issues with ductless and ducted systems.

Common Issues

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Not Heating

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Noise Issues

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Odors

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