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&lt;/script&gt;</html><description>Mitsubishi 4109 Error Code 1. Error code definitionIndoor unit fan operation error2. Error definition and error detection method1) Connector CN28 has remained open-circuited for 100 consecutive secondsduring operation.3. Cause, check method and remedyCause Check method and remedy(1) Auxiliary relay fault The coil or the wiring of the auxiliary relay connected toCN28 is faulty.(2) Connector (CN28) [&hellip;]</description></oembed>
