7 TroubleshootingOperation manual19(C)(F)TXA15~50A2V1B(W)(S)(T)Daikin room air conditioner3P485919-7C – 2017.127.1.9 Symptom: The outdoor fan rotates whilethe air conditioner is not in operation▪ After operation has stopped. The outdoor fan continues torotate for another 30 seconds for system protection.▪ While the air conditioner is not in operation. When the outdoortemperature is very high, the outdoor fan starts to rotate forsystem protection.7.2 Solving problems based on errorcodesWhen a problem happens, an error code appears on the userinterface. It is important to understand the problem and to takemeasures before resetting an error code. This should be done by alicensed installer or by your local dealer.This chapter gives you an overview of all error codes and thecontent of the error code as it appears on the user interface.For a more detailed troubleshooting guideline for each error, pleasesee the service manual.Fault diagnosis by user interfaceThe user interface can receive an error code from the indoor unitreferring to the fault. It is important to understand the problem andtake measures before resetting the error code. This should be doneby a licensed installer or your local dealer.To see the error code on the user interface:1 Hold for about 5 seconds.Result: blinks in the temperature display section.2 Press repeatedly until a continuous beep is heard.Result: The code is now displayed on the display.INFORMATION▪ A short beep and 2 consecutive beeps indicate non-corresponding codes.▪ To cancel the code display, hold the cancelbutton for 5 seconds. The code will also disappear fromthe display if the button is NOT pressed within1 minute.SystemError code DescriptionNormalRefrigerant shortageOvervoltage detectionSignal transmission error (between indoor andoutdoor unit)Indoor/outdoor unit combination faultIndoor unitError code DescriptionIndoor unit PCB abnormalityFreeze-up protection or high-pressure controlFan motor (DC motor) abnormalityStreamer unit errorIndoor heat exchanger thermistor abnormalityOpening or closing front panel errorRoom temperature thermistor abnormalityHumidity sensor errorOutdoor unitError code Description4-way valve abnormalityOutdoor unit PCB abnormalityOverload activation (compressor overload)Compressor lockDC fan lockInput power overcurrentDischarge pipe temperature controlHigh-pressure control (in cooling mode)Compressor system sensor abnormalityPosition sensor abnormalityDC voltage / current sensor abnormalityOutdoor temperature thermistor abnormalityDischarge pipe thermistor abnormalityOutdoor heat exchanger thermistor abnormalityElectrical parts heat errorRadiation fin temperature riseInverter instantaneous overcurrent (DC)Radiation fin thermistor abnormalityCompressor internal temperature error7.3 Troubleshooting for wirelessconnection adapterThe following table provides a brief description of how to deal withsome problems. If none of the following solutions fix the problem, goto http://www.onlinecontroller.daikineurope.com/ for moreinformation and FAQ.Problem MeasureConnection to the WLAN adapteris not possible (none of the LEDsare blinking).▪ Try operating the unit with theuser interface.▪ Check if the power is on.▪ Turn the unit off and back onagain.The WLAN adapter is NOTvisible on the unit overviewscreen (Home screen) afterconfiguration of the WLANadapter (WPS option).▪ Make sure the wireless LANadapter is close enough to thecommunication device.▪ Check if communication is OK.See "To confirm the wirelessadapter connection status" onpage 12.▪ Make sure that the smartdevice is connected to thesame wireless network as theWLAN adapter.▪ Try resetting to the factorydefault and repeat the setting.See "To reset the connectionsetting to the factorydefault" on page 13.