(4) Troubleshooting procedure (If the air conditioner runs)Confirm the contents of the customer complaint.NOThe cause of the trouble canbe specifically identified.YESCheck the self-diagnosis display.See page 34.Eliminate the cause of the trouble and perform anoperation check.Is an error code displayed bythe self-diagnosis function?YESNOUsing the Service Mode, access the self-diagnosisdisplays generated in the past.See pages 35~38.YESIs there a history of selfdiagnosisdisplay items?NOUsing the Service Mode, access the stop history dueto protection control generated in the past.See pages 35~38.YESIs there a history of stops dueto protection control? (1)NOIdentify the faulty component by using the checkprocedure corresponding to the content of the trouble.Replace the faulty component, then perform anoperation check.The air conditioning system is operating normally.Note (1) Even in cases where only intermittent stop data are generated, the air conditioning system is normal. However, if the same protective operation recursrepeatedly (3 or more times), it will lead to customer complaints. Judge the conditions in comparison with the contents of the complaints.- 33 -
(5) Self-diagnosis tableWhen this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing ofdisplay lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the troubledisplay stops and the air conditioner resumes operation. (1)Indoor unit display panelRUNlight1 timeflashTIMERlightONWiredremotecontroldisplayE 6Descriptionof troubleHeat exchangersensor errorCause• Broken heat exchanger sensorwire, poor connectorconnectionDisplay (flashing) conditionWhen a heat exchanger sensor wire disconnection is detected whileoperation is stopped. (If a temperature of –20ºC or lower is detected for15 seconds, it is judged that the wire is disconnected.)(Not displayed during operation.)2 timeflashONE 7Roomtemperaturesensor error• Broken room temperaturesensor wire, poor connectorconnectionWhen a room temperature sensor wire disconnection is detected whileoperation is stopped. (If a temperature of –20ºC or lower is detected for15 seconds, it is judged that the wire is disconnected.)(Not displayed during operation.)6 timeflashONE 16Indoor fanmotor error• Defective fan motor, poorconnector connectionWhen conditions for turning the indoor unit’s fan motor on exist duringair conditioner operation, an indoor unit fan motor speed of 300 rpm orlower is measured for 30 seconds or longer. (The air conditioner stops.)Keepsflashing1 timeflashE 38Outdoor airtemperaturesensor error• Broken outdoor air temp.sensor wire, poor connectorconnectionWhen an outdoor temperature sensor wire disconnection is detectedwhile operation is stopped. (If a temperature of –40ºC or lower isdetected for 15 seconds, it is judged that the wire is disconnected.)(Not displayed during operation.)Keepsflashing2 timeflashE 37Outdoor heatexchangersensor error• Broken heat exchanger sensorwire, poor connectorconnectionWhen a sensor wire disconnection is detected while operation isstopped. (If a temperature of –50ºC or lower is detected for 15 seconds,it is judged that the wire is disconnected.)(Not displayed during operation.)Keepsflashing4 timeflashE 39Discharge pipesensor error• Broken discharge pipe sensorwire, poor connectorconnectionWhen a compressor discharge pipe sensor wire disconnection isdetected for 15 seconds or longer (less than 7ºC) after the outdoorunit’s speed has continued at 0 rps or higher for 9 minutes.(The air conditioner stops.)ON1 timeflashE 42Current Cut• Compressor locking, openphase on compressor output,shortcircuit on powertransistor, closed service valveThe inverter output current (compressor motor current) exceeds the setvalue during compressor start.(The air conditioner stops.)ON2 timeflashE 59Trouble ofoutdoor unit• Broken compressor wire• Broken discharge pipe sensorwire, poor connectorconnection• Compressor blockageWhen there is an emergency stop caused by trouble in the outdoor unit,or the input current value is found to be lower than the set valuecontinuously for 3 minutes or longer.(The air conditioner stops.)ON3 timeflashE 58Current safestop• Overload operation• Overcharge• Compressor lockingWhen the inverter command speed is 20 rps or less and the current safehas operated. (the compressor stops)ON5 timeflashE 41Power transistorerror• Broken power transistorWhen there is an emergency stop caused by trouble in the outdoor unit,or the input current value is found to be lower than the set valuecontinuously for 3 minutes or longer.(The air conditioner stops.)ON5 timeflashE 36Over heat ofcompressor• Gas shortage, defectivedischarge pipe sensor, closedservice valveWhen the value of the discharge pipe sensor exceeds the set value.(The air conditioner stops.)ON6 timeflashE 5Error of signaltransmission• Defective power supply,Broken signal wire, defectivein/outdoor unit boardsWhen there is no signal between the indoor unit’s board and outdoorunit’s board for 10 seconds or longer (when the power is turned on), orwhen there is no signal for 1 minute 50 seconds or longer (duringoperation)(the compressor is stopped).ON7 timeflashE 48Outdoor fanmotor error• Defective fan motor, poorconnector connectionWhen the outdoor unit’s fan motor sped continues for 30 seconds orlonger at 75 rpm or lower. (3 times) (The air conditioner stops.)2 timeflash2 timeflashE 60Rotor lock• Defective compressor• Open phase on compressor• Defective outdoor unit boardsIf the compressor motor’s magnetic pole positions cannot be correctlydetected when the compressor starts.(The air conditioner stops.)— — E 1Error of wiredremote controlwiring• Broken wired remote controlwire, defective indoor unitboardsThe wired remote control wire Y is open. The wired remote controlwires X and Y are reversely connected. Noise is penetrating the wiredremote control lines. The wired remote control or indoor control PCB isfaulty. (The communications circuit is faulty.)Notes (1)The air conditioner cannot be restarted using the remote control for 3 minutes after operation stops.(2)The wired remote control is optional parts.- 34 -
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