Troubleshooting by Indication on the Remote Controller Mini UM S/M128 Troubleshooting4.20 “F3” Outdoor Unit: Abnormal Discharge PipeTemperatureRemoteControllerDisplayF3ApplicableModelsAII outdoor unit modelsMethod ofMalfunctionDetectionAbnormality is detected according to the temperature detected by the discharge pipetemperature sensor.MalfunctionDecisionConditions When the discharge pipe temperature rises to an abnormally high level When the discharge pipe temperature rises suddenlySupposedCauses Faulty discharge pipe temperature Faulty connection of discharge pipe thermistor Faulty outdoor unit PCBTroubleshooting∗ Refer to thermistor resistance / temperature characteristics table on P190.(V3182)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Discharge pipetemperature is 115°Cor higher.Arethe characteristicsof the discharge pipethermistor normal?(3.5~400KΩ)Replace outdoor unit PC boardA1P.Replace the discharge pipethermistor.NONOOut of gas, compression defect,etc. Defect of the refrigerantsystem.YESYES
