Daikin FBQ71C8VEB - Equipment Operates but Does Not Provide Heating

ESIE15-13C Symptom-based Troubleshooting
Service Diagnosis 109
2.7 Equipment Operates but does not Provide Heating
Applicable Model All models of SkyAir series
Supposed
Causes
 Overcharge of refrigerant
 Air mixed in refrigerant system
 Defective pressure switch
 Defective magnetic switch for outdoor unit fan motor
 Defective aux. relay for outdoor unit fan motor
 Soiled heat exchanger of outdoor unit
 There is an interfering item in airflow of outdoor unit.
 Defective outdoor unit fan
 Soiled air filter of indoor unit
 Soiled heat exchanger of indoor unit
 There is an interfering item in airflow of indoor unit.
 Defective indoor unit fan