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<h2 id="isPasted"><u>Introduction</u></h2><p>The &quot;P7&quot; error code indicates T2 freeze protection. This article is for <a href="https://www.pioneerminisplit.com/collections/vertex-ducted-central-split" target="_blank" rel="noopener noreferrer">Vertex Ducted Central Split (DYC-18) systems</a>.&#xA0;</p><p><strong>Cause:&#xA0;</strong>The T2 detection temperature is too low. The T2 sensor detects the temperature is less than 32&#xB0;F (0&#xB0;C).&#xA0;</p><h2 id="troubleshooting-diagram"><u>Troubleshooting Diagram</u></h2><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026020315-22cf08e4-3b6b-4cd4-915e-e2f2bf52aa67-dyc18_troubleshooting_p7.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></p><h2 id="troubleshooting-notes"><u>Troubleshooting Notes</u></h2><ul><li>Begin by confirming whether the indoor coil is frozen. If it is frozen, check the pipe system. If there is no icing, check the T2 sensor or the indoor board.</li><li>Measure the resistance of the T2 temperature sensor and check whether it drifts by comparing it with the resistance table. If it drifts, replace the sensor.&#xA0;</li><li>Replace the indoor board.&#xA0;</li></ul>

The "P7" error code indicates T2 freeze protection. This article is for Vertex Ducted Central Split (DYC-18) systems.

P7 Error Code

Troubleshooting

By Error Code

Error Codes for Vertex Ducted Central Split (DYC-18) Systems

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P7 Error CodeUpdated 4 days ago

Introduction

Troubleshooting Diagram

Troubleshooting Notes