Daikin error code daikin-air-error-codestransparent600#282828 Code Table №1Code Table №2Code Table №3Code Table №4Code Table №5 Codes Description System 00 Normal U0 Refrigerant shortage U2 Drop voltage or main circuit overvoltage U4 Failure of transmission (between the indoor unit and outdoor unit) Indoor unit A1 Indoor PCB defectiveness A5 High-pressure control or freeze-up protector A6 Fan motor fault C4 Faulty heat exchanger temperature sensor C9 The faulty suction air temperature sensor Outdoor unit EA Cooling-heating switching error E5 Ol started E6 Faulty compressor startup E7 Dc fan motor fault E8 Overcurrent input F3 High-temperature discharge pipe control H6 Operation halt due to the faulty position detection sensor H8 Dc current sensor fault H9 The faulty suction air temperature sensor J3 Faulty discharge pipe temperature sensor J6 Faulty heat exchanger temperature sensor L4 The high temperature at inverter circuit heatsink L5 Output overcurrent P4 Faulty inverter circuit heatsink temperature sensor Error codes Cause A3 Drain level control system abnormality A5 Freeze-up protection control or heating peak-cut control A6 Fan motor or related abnormality A7 Swing motor look A9 Electronic expansion valve abnormality AF Drain system abnormality C4 Thermistor or related abnormality C5 Thermistor or related abnormality C7 Front panel open / close fault C9 Thermistor or related abnormality CJ Remote controller thermistor abnormality E2 BP unit PCB abnormality E3 Actuation of high pressure switch E4 Actuation of low pressure switch E5 Compressor motor lock E7 Outdoor fan motor abnormality E9 Moving part of electronic expansion valve (Y1E, Y3E) abnormality F3 Discharge pipe temperature abnormality F6 Refrigerant overcharged H9 Outdoor temperature thermistor (R1T) abnormality JO BP liquid or gas pipe thermistor abnormality J3 Discharge pipe thermistor (R2T) abnormality J5 Suction pipe thermistor (R3T, R5T) abnormality J6 Outdoor heat exchanger thermistor (R4T) abnormality J7 Outdoor liquid pipe thermistor (R7T) abnormality J9 Subcooling heat exchanger gas pipe thermistor (R6T) abnormality JA High pressure sensor abnormality JC Low pressure sensor abnormality L1 Outdoor unit PCB abnormality L4 Radiation fin temperature rise L5 Inverter compressor abnormality L8 Inverter current abnormality L9 Inverter start-up error P1 High voltage of capacitor in main inverter circuit P4 Radiation fin thermistor abnormality U2 Power supply insufficient or instantaneous failure U3 Check operation is not conducted. U4 Transmission error between indoor unit and BP unit U5 Transmission error between remote controller and indoor unit U8 Transmission error between main and sub remote controllers U9 Transmission error between indoor unit and outdoor unit in the same system UA Field setting switch abnormality UC Address duplication of central remote controller UE Transmission error between centralized remote controller and indoor unit UF System is not set yet UH System abnormality refrigerant system address undefined UJ Transmission error between outdoor unit and BP unit Error codes Cause UO Insufficient gas US Power factor module abnormality W Signal transmission error (between indoor and outdoor units) US Signal transmission error (between indoor unit and remote controller) R1 Indoor Unit R3 Faulty drainage R 5 Operation halt due to the freeze protection function or high pressure control R6 Fan motor or related abnormality CH or CS Heat exchanger temperature thermistor abnormality C3 Room temperature thermistor abnormality CR Discharge air temperature thermistor abnormality ES Outdoor Unit E6 Compressor startup error F3 Operation halt due to discharge pipe control function H8 CT or related abnormality H3 Outside air thermistor or related abnormality J3 Discharge pipe temperature thermistor or related abnormality J6 Heat exchanger temperature thermistor or related abnormality J3 Gas pipe temperature thermistor or related abnormality LH Radiation fin temperature rise P3 Heat radiation fin thermistor or related abnormality PH Heat radiation fin thermistor or related abnormality EO Protectors Function Problem Cause Operation does not start soon. When the “ON/OFF” button was pressed soon after the operation was stopped. When the mode was reselected. This is to protect the air conditioner. You should wait for about 3 minutes. Hot air does not flow out soon after the start of HEAT operation. The air conditioner is warming up. You should wait for 1 to 4 minutes. (The system is designed to start discharging air only after it has reached a certain temperature.) The HEAT operation stops suddenly and a flowing sound is heard. The system is taking away the frost on the outdoor unit. You should wait for about 4 to 12 minutes. The outdoor unit emits water or steam. In HEAT operation The frost on the outdoor unit melts into water or steam when the air conditioner is in defrost operation. In COOL or DRY operation Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips. The mist comes out of the indoor unit. This happens when the air in the room is cooled into mist by the cold airflow during COOL operation. This is because the air in the room is cooled by the heat exchanger and becomes mist during defrost operation. The indoor unit gives out the odor. This happens when smells of the room, furniture, or cigarettes are absorbed into the unit and discharged with the airflow. If this happens, it is recommended to have the indoor unit washed by a technician. Consult the service shop where you purchased the air conditioner. The outdoor fan rotates while the air conditioner is not in operation. After the operation is stopped The outdoor fan continues rotating for another 60 seconds for system protection. While the air conditioner is not in operation When the outdoor temperature is very high, the outdoor fan starts rotating for system protection. Operation stopped suddenly. (OPERATION lamp is on.) For system protection, the air conditioner may stop operating on a sudden large voltage fluctuation. It automatically resumes operation in about 3 minutes. No remote controller signals are displayed. Remote controller sensitivity is low. The display is low in contrast or blacked out. The display runs out of control. The batteries are dying and the remote controller is malfunctioning. Replace all the batteries with new size batteries, AAA.LR03 (alkaline). For details, refer to set the batteries of this manual. Possible sounds Flowing water: Generated because the refrigerant in the air conditioner is flowing. This is a pumping sound of the water in the air conditioner and heard when the water is pumped out from the air conditioner in cooling or drying operation. The refrigerant flows in the air conditioner even if the air conditioner is not working when the indoor units in other rooms are in operation. Blowing Generated when the flow of the refrigerant in the air conditioner is switched over. Pinging Generated when the size of the air conditioner slightly expands or shrinks as a result of temperature changes. Problem Cause The air conditioner does not operate. (OPERATION lamp is off.) Is a breaker off or a fuse blown? Is there a power failure? Are batteries set in the remote controller? Is the timer setting correct? Cooling (Heating) effect is poor. Are the air filters clean? Is there anything to block the air inlet or the outlet of the indoor and the outdoor units? Is the temperature setting appropriate? Are the windows and doors closed? Are the airflow rate and the airflow direction set appropriately? Operation stopped suddenly. (OPERATION lamp flashes.) Are the air fi lters clean? Is there anything to block the air inlet or the outlet of the indoor and the outdoor units? Clean the air fi lters or take all obstacles away and turn the breaker off. Then turn it on again and try operating the air conditioner with the remote controller. If the lamp still flashes, call the service shop where you purchased the air conditioner. Are operation modes all the same for indoor units connected to outdoor units in the multi system? If not, set all indoor units to the same operating mode and confi rm that the lamps flash. Moreover, when the operating mode is in AUTO, set all indoor unit operating modes to COOL or HEAT for a moment and check again that the lamps are normal. If the lamps stop flashing after the above steps, there is no malfunction. An abnormal functioning happens during operation. The air conditioner may malfunction with lightning or radio waves. Turn the breaker off, turn it on again and try operating the air conditioner with the remote controller. The louvers do not immediately swing. The louvers move soon after startup. The air conditioner is adjusting the louvers position. The louvers will start moving soon.