Troubleshooting ESIE05-033–16 Part 3 – Troubleshooting313451.3.6 Equipment operates but does not provide heatingApplicable Model All models of SkyAir seriesError DetectionMethodError GeneratingConditionPossible Cause P Excess charge of refrigerantP Air intrudes into refrigerant systemP Faulty pressure switchP Faulty magnetic switch for outdoor unit fan motorP Faulty aux. relay for outdoor unit fan motorP Soiled heat exchanger of outdoor unitP There is an interfering item in air flow of outdoor unitP Malfunction of outdoor unit fanP Soiled air filter of indoor unitP Soiled heat exchanger of indoor unitP There is some interfering item in airflow of indoor unitP Malfunction of indoor unit fan