Symptom-based Troubleshooting SiME281501E77 Service Diagnosis2.4 Cooling / Heating Operation Starts but Stops ImmediatelyApplicable Model All models of TopAir seriesSupposedCauses 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 some interfering item in airflow of indoor unit Defective indoor unit fanTroubleshootingDiagnose based on the errorcode on remote controllerIs the type ofremote controller wired orwireless?Is there any interferingitem in airflow?Is the operationlamp of remote controllerblinking?wired YESCaution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.Wireless NONOYESIs theoperation lamp of indoor unitreceiver blinking?YESDefective fan motor. Check themagnetic switch and aux. relayfor fan motor.Does the fan rotate? NONOCleaningIs the filter soiled? YESNONORemove the interfering item.YESIs the heat exchangersoiled?After vacuum drying, chargecorrect amount of refrigerant.Check the pressure switch.Cleaning of the heat exchangerYESPossible causes as follows:∗ Refrigerant overcharge∗ Mixing of air in refrigerant system∗ Defective pressure switchHeating: IndoorunitCooling: Outdoorunit
