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SiBE811001EB TroubleshootingCONVENI-PACK 2608.5.7 Abnormal Discharge Pipe TemperatureError Code F3ApplicableModelsLCBKQ3AV1Method of ErrorDetectionAbnormality is detected according to the temperature detected by the discharge pipetemperature thermistor.Error DecisionConditionsWhen the discharge pipe temperature rises to an abnormally high levelSupposedCauses Defective discharge pipe temperature Defective discharge pipe thermistor Defective outdoor unit PCB Clogging of electronic expansion valve for injection Insufficient injection at intermediate heat exchanger outlet caused by flash gas due to gasleakage or insufficient volume of refrigerant Insufficient insulation of onsite suction pipe Defective suction pipe thermistor Defective low pressure sensorTroubleshooting∗1. Compare the resistance value of discharge pipe thermistor and the value based on the surface thermometer.Refer to P.290.LED IndicationsFirst digit l h k h l h lSecond digit l k h h h l lOR• 120°C or more• 110°C or more: 15 sec.• 120°C or more: 90 sec.Check if dischargepipe thermistorproperty is normal.(∗1)Replace the discharge pipethermistor.NOReplace the PCB (A1P).NOCaution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.YESYESConnect the service checker.Press reset and start operation again.Service CheckerConnect the service checker to compare the temperature of dischargepipe by using service checker with actual measurement value ofdischarge pipe thermistor (∗1).· Discharge pipe thermistor is normal and the temperature detectionof the outdoor unit main PCB is also normal.· Actually the temperature of discharge pipe is high.CHECK 3-3 Remove the factor of overheat operation referring toP.290.Check iftemperature ofdischarge pipe byusing servicechecker is the samewith actualmeasurement valueof discharge pipethermistor.CHECK 3-3