SiME281501E Symptom-based TroubleshootingService Diagnosis 802.6 Equipment Operates but does not Provide CoolingApplicableModelsAll models of TopAir seriesSupposedCauses Wrong selection of model Refrigerant shortage Insufficient airflow in the indoor unit Increase of high pressure In addition, the following errors may be conceivable• Insufficient compression of the compressor• Insufficient circulation of refrigerant• Defective electronic expansion valveTroubleshootingNormal.Does the heatload increase after installationof the unit?Temperaturedifference for cooling shouldbe between 8 and18˚C.Additional unit installationshould be considered.YESDoes indoor unitairflow rate decrease?YESYESCaution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.Measure the temperature of suctionair and discharge air.Temperature difference = Suction airtemp. – Discharge air temp.• Wrong selection of model• Affection of direct sunCheck the each section.• Clogged air filter• Soiled heat exchanger• Defective fan motor(Refer to troubleshooting “A6”.)Check the each item.• Refrigerant overcharge• Air mixed in refrigerant system• Soiled heat exchanger• Short circuit of discharge air• Disturbing item in airflow• Defective fan motor of outdoorunit(Refer to troubleshooting “E7”.)Check the each item.• Insufficient compression ofcompressor• Insufficient circulation ofrefrigerant• Defective electronicexpansion valveRefrigerant shortage possiblygenerates trouble.After vacuum drying, chargecorrect amount of refrigerant.NONONOIs the level ofhigh pressure higher thannormal level?YESNONOIs theoperation current less thanspecified level?Does any frostgenerate around inletport of indoor unit heat exchangeror outlet port of electronicexpansion valve?YES YESNO
