The "E0" error codes indicate a communication fault between the indoor and outdoor units.

<p><br></p><h2 id="error-code-e0---indoor-unit-idu-and-outdoor-unit-odu-communication-fault">Error Code E0 - Indoor Unit (IDU) and Outdoor Unit (ODU) Communication Fault</h2><p><img src="https://attachments.gorgias.help/uploads.gorgias.io/Q9r0k7BYaV2vg13y/WYT_E0-de8eeb3a-eac5-4ee0-beb0-727329cae1b7.png" style="width: 692px;" class="fr-fic fr-dib fr-bordered"></p><p><br></p>

Error code E0

The "E9” or “P0” error codes indicate an inverter drive error is present. The error code may display if the compressor or outdoor board is failing.

<div data-block="true" data-editor="8h0fc" data-offset-key="3tpp7-0-0" id="isPasted" style="box-sizing: border-box; -webkit-font-smoothing: antialiased; color: rgb(34, 34, 34); font-family: Inter, &quot;Helvetica Neue&quot;, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: pre-wrap; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><h2 id="introduction"><u>Introduction</u></h2><p>The &quot;E9&#x201D; or &#x201C;P0&#x201D; error codes indicate an inverter drive error is present. The error code may display if the compressor or outdoor board is failing. The error codes are for Diamante Series systems.</p><h2 id="troubleshooting"><u>Troubleshooting</u></h2><ul id="isPasted"><li style="font-size: 16px;">Ensure your outdoor refrigerant valves are backed out all the way counterclockwise to the open position by ohming &#x3A9; out the compressor with a multimeter.<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025053013-eea4bf9e-1c84-49b3-a84b-d3b9df88e8b9-outdoor_refrigerant_valves.png" style="width: 300px;" class="fr-fic fr-dib"></li><li style="font-size: 16px;">Remove the top and front panels of the unit to see the compressor.</li><li style="font-size: 16px;">Pull out the sound insulation blanket wrapped around the compressor.</li><li style="font-size: 16px;">Ohm &#x3A9; out 3 compressor lead pairs on the large white Molex plug between the compressor and the board. The plug usually has red, blue, and white (or black) wires, meaning you will test each pin against each other.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025053013-4becf0df-c909-471c-8d75-d0acc0db4c07-molex_plug.png" style="width: 300px;" class="fr-fic fr-dib"></li><li style="font-size: 16px;">Test each wire individually against the ground using the metal casing of the unit or a ground screw. The wires should not have any reading against the ground. The compressor should not be grounded. The multimeter should read &#x201C;0&#x201D; or &#x201C;Open Line.&#x201D;</li><li style="font-size: 16px;">If the compressor works properly, replace the outdoor Inverter Power Module (IPM) board.</li></ul><p><strong id="isPasted">Note</strong>: Contact our Parts and Warranty department for any replacement components. Call 1-800-919-0150; Option #4.</p><h2 id="troubleshooting-diagram"><u>Troubleshooting Diagram</u></h2><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025052818-ba7d4073-910e-4d43-86a6-3af3176b82a2-aebe42f2-3f98-4127-b34e-c11c2bada248.png" id="isPasted" class="fr-fic fr-dib fr-bordered"></p><h2 id="related-resources"><u>Related Resources</u></h2><ul id="isPasted"><li style="font-size: 16px;">Click this link for a general parts diagram of the WYS wall mount. The diagram displays the compressor in the outdoor unit: <a href="https://www.pdhvac.com/site/downloads/wys22_Exploded_Parts_Diagram.pdf">WYS Wall Mount Parts Diagram</a>&#xA0;</li><li style="font-size: 16px;">See page 90 in this manual to learn how to open the outdoor condenser unit: <a href="https://www.pdhvac.com/site/downloads/WYS_SM.pdf" target="_blank" rel="noopener noreferrer">Quantum Inverter Series Service &amp; Troubleshooting Manual</a></li></ul></div><div data-block="true" data-editor="8h0fc" data-offset-key="98m18-0-0" style="box-sizing: border-box; -webkit-font-smoothing: antialiased; color: rgb(34, 34, 34); font-family: Inter, &quot;Helvetica Neue&quot;, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: pre-wrap; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br></div>

Error code E9/P0

The "FY" error code indicates the system detects refrigerant leakage.

<div data-block="true" data-editor="645tt" data-offset-key="81k9b-0-0" id="isPasted" style="box-sizing: border-box; -webkit-font-smoothing: antialiased; color: rgb(27, 28, 29); font-family: Inter, &quot;Helvetica Neue&quot;, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: pre-wrap; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><h2 id="isPasted"><u>Introduction</u></h2><p>The &quot;FY&quot; error code indicates the system detects refrigerant leakage. The error code is for Diamante Series systems.</p><h2 id="isPasted"><u>Troubleshooting</u></h2><p><strong>Note</strong>: You may require an HVAC professional for assistance.</p><h3 id="the-troubleshooting-recommendations-for-new-or-recently-installed-units-include"><span style="font-size: 16px;">The troubleshooting recommendations for new or recently installed units include:</span></h3><ul type="disc"><li style="font-size: 16px;">Open the valves on the outdoor unit fully. The valves release the refrigerant from the outdoor unit into the circuit.</li><li style="font-size: 16px;">Ensure the length of the piping used for the indoor unit does not exceed the pre-charge refrigerant length. (25 ft. pre-charge per zone)</li><li style="font-size: 16px;">Inspect your unit for a potential leak. Check the following:<ul type="circle" style="font-size: initial;"><li style="font-size: 16px;">Oil stains or residue around the unit&#x2019;s fittings and connections.</li><li style="font-size: 16px;">Hissing or bubbling sounds near the unit when it&#x2019;s running.</li><li style="font-size: 16px;">Reduced cooling or heating performance.</li></ul></li><li style="font-size: 16px;">Check the pressure PSI for the unit and verify it&#x2019;s within the appropriate range. Use r410a-compaible gauges while the system is On and running to check the pressure PSI. You can force the compressor to turn On using the manual button on the indoor unit. <strong>Note</strong>: Use the Refrigerant Pressure-Temperature chart for reference when checking the pressure PSI. <a href="https://www.pdhvac.com/site/downloads/Temperature-Pressure-Chart.pdf" target="_blank">Refrigerant Pressure-Temperature chart</a><span data-offset-key="54hi0-0-0"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025053013-2d75861f-4743-4c6c-98e6-695da5cefc82-manual_button_diamante_series.png" style="width: 300px;" class="fr-fic fr-dib"></span></li></ul><h3 id="the-troubleshooting-recommendations-for-units-include"><span style="font-size: 16px;">The troubleshooting recommendations for units include:</span></h3><ul><li style="font-size: 16px;">Check the pipe connection for any gas leakage.&#xA0;<ul style="font-size: initial;"><li style="font-size: 16px;">If there is a gas leakage, repair and charge new gas as spec.&#xA0;</li><li style="font-size: 16px;">If there is not gas leakage, check the room and evaporator coil temperature.&#xA0;</li></ul></li><li style="font-size: 16px;">Repair and charge new gas as spec.<ul style="font-size: initial;"><li style="font-size: 16px;">If the error continues, replace the indoor Printed Circuit Board (PCB).&#xA0;</li></ul></li><li style="font-size: 16px;">Check the room and evaporator coil temperature. Determine if the temperature difference is more than 2&#xB0;C (35.6&#xB0;F) btw RT and IPT after starting the unit.&#xA0;<ul style="font-size: initial;"><li style="font-size: 16px;">If yes, check if the sensor is connected to the PCB.&#xA0;</li><li style="font-size: 16px;">If no, check if there are any obstructions in the evaporator pipe.&#xA0;</li></ul></li><li style="font-size: 16px;">Confirm the sensor is connected to the PCB.&#xA0;<ul style="font-size: initial;"><li style="font-size: 16px;">If yes, check if the sensor is short circuited.&#xA0;</li><li style="font-size: 16px;">If no, reconnect the sensor to the PCB.&#xA0;</li></ul></li><li style="font-size: 16px;">Check if the sensor short circuited. Replace the sensor if it short circuited.&#xA0;</li><li style="font-size: 16px;">Check if there are any obstructions in the evaporator pipe.<ul style="font-size: initial;"><li style="font-size: 16px;">If yes, replace the evaporator.</li><li style="font-size: 16px;">If not, replace the indoor PCB.</li></ul></li></ul><p><strong>Note</strong>: Contact our Parts and Warranty department for any replacement components. Call 1-800-919-0150; Option #4.</p><h2 id="isPasted"><u>Methods for Checking Leaks</u></h2><p><span style="font-size: 16px;">The following are recommended methods for checking leaks:</span></p><ul type="disc"><li style="font-size: 16px;">You can check for leaks by combining water with a small amount of dish soap or liquid detergent. Apply the soapy water solution to the fittings, connections, and tubing of the indoor and outdoor units while the mini-split is turned on. The particular spot where the bubbles form indicates the location of the refrigerant leak.</li><li style="font-size: 16px;">Leak detector tools can detect refrigerant leaks through electronic sensors along the piping and around the unit coils.</li><li style="font-size: 16px;">Nitrogen pressure testing is commonly used by leak detection techs.</li></ul><h2 id="troubleshooting-diagram"><u>Troubleshooting Diagram</u></h2></div><div style="box-sizing: border-box; -webkit-font-smoothing: antialiased; color: rgb(27, 28, 29); font-family: Inter, &quot;Helvetica Neue&quot;, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: pre-wrap; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025052818-12efeebf-7d8d-4175-900e-bea9becfb2f3-74c23ab2-566b-4a01-b9af-cfdcdc89473a.png" style="box-sizing: border-box; -webkit-font-smoothing: antialiased; border-style: none; max-width: 100%; width: 692px; cursor: default;" class="fr-fic fr-dib fr-bordered"></div><div data-block="true" data-editor="645tt" data-offset-key="dcokr-0-0" style="box-sizing: border-box; -webkit-font-smoothing: antialiased; color: rgb(27, 28, 29); font-family: Inter, &quot;Helvetica Neue&quot;, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: pre-wrap; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br></div>

Error code FY

The “PA” error code for multi-zone Diamante Ultra Series systems indicates the units are experiencing a mode conflict.

<p id="isPasted">The &#x201C;PA&#x201D; error code for multi-zone Diamante Ultra Series systems indicates the units are experiencing a mode conflict. Mode conflicts occur when one unit requests heat while another requests cool.</p><p>You can resolve this error by setting all the indoor units to either manual Cool or manual Heat mode.</p><p><strong>Note</strong>: Avoid running the units on Auto mode, as it could cause this error.</p>

Error code PA for multi-zone Diamante Ultra Series systems

The “0A” code indicates your Diamante Series system has been placed into “Generator” or “Gen” mode.

<h2 id="isPasted"><u>Introduction</u></h2><p>The &#x201C;0A&#x201D; code indicates your Diamante Series system has been placed into &#x201C;Generator&#x201D; or &#x201C;Gen&#x201D; mode. The &#x201C;0A&#x201D; code is not an error code.</p><p>Generator mode is helpful for unstable net power areas. The air conditioner works in Generator mode.<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025053013-61eb6df6-1995-49ec-8152-b0b6f935c6c2-generator_mode_details.png" style="width: 450px;" class="fr-fic fr-dib"><span contenteditable="false" draggable="false"><br></span></p><p><strong>Note</strong>: Diamante Series systems enter Generator mode after holding the &#x201C;Mute&#x201D; button on the remote for 3 seconds.</p><h2 id="isPasted"><u>Exit Generator Mode</u></h2><ol><li style="font-size: 16px;">Turn On the indoor unit.</li><li style="font-size: 16px;">Press and hold the &#x201C;Mute&#x201D; button for at least 3 seconds. The remote will enter the setting interface of &#x201C;Generator&#x201D; mode.</li><li style="font-size: 16px;">Press the &#x201C;Mute&#x201D; button consecutively until &#x201C;OF&#x201D; displays on the remote.</li><li style="font-size: 16px;">Wait until the &#x201C;OF&#x201D; symbols on the remote blink.</li></ol><p><strong>Result</strong>: The indoor unit will exit &#x201C;Generator&#x201D; mode.</p><p><strong>Note</strong>: You can use the Pioneer Airlink App to fully control &#x201C;Generator&#x201D; mode, including turning it On or Off.<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025053013-62f15a00-e74f-4bca-937f-a186c78ed663-generator_mode_app.png" style="width: 300px;" class="fr-fic fr-dib">&#xA0;</p><h2 id="isPasted"><u>Video Tutorial</u></h2><p>Watch this video tutorial to learn how to exit generator mode:</p><p><span class="fr-video fr-deletable fr-rv fr-fvc fr-dvb fr-draggable fr-active" contenteditable="false" draggable="true"><iframe width="100%" src="https://www.youtube.com/embed/tUjc9UxfqDc?&amp;wmode=opaque&amp;rel=0&amp;autoplay=1" frameborder="0" allowfullscreen class="fr-draggable"><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span><span class="fr-mk" style="display: none;">&#xA0;</span></iframe></span></p><p>Video length: 0:16</p>

Indoor unit displaying 0A code

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Error Code Troubleshooting (Diamante Series)

Do I need to restart my unit manually after the power goes out?

How can I fix my indoor air handler when the unit is not turning On?

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Diagnosing and Preventing Crossed Wiring in Multi-Zone Systems

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Indoor Unit

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