Daikin Fault Codes

• AO Indoor Error of external protection device
• A1 Indoor PCB defect
• A3 Indoor Malfunction of drain Level control system
• A5 Indoor Freeze-up prevention
• A6 Indoor Fan motor lock, Overload
• A7 Indoor Malfunction of swing motor flap
• A9 Indoor Malfunction of EEV
• AF Indoor Drain level above limit (clogging)
• AJ Indoor Malfunction of capacity set device
• C3 Indoor Malfunction of drain thermistor
• C4 Indoor Malfunction of liquid pipe thermistor
• C5 Indoor Malfunction of gas pipe thermistor
• C7 Indoor Lower louvre limit switch/motor
• C9 Indoor Malfunction of air thermistor
• CC Indoor Malfunction of moisture sensor
• CA Indoor Malfunction of discharge air thermistor
• CJ Indoor Malfunction of remote control thermistor
• CE Indoor Malfunction of radiant heat sensor
• E0 Outdoor Activation of outdoor safety device
• E1 Outdoor PCB defect
• E3 Outdoor Activation of high pressure switch
• E4 Outdoor Activation of low pressure switch
• E5 Outdoor Activation of compressor over heat protection
• E5 Outdoor Compressor motor lock
• E6 Outdoor Compressor start up error
• E6 Outdoor Standard compressor lock/overcurrent
• E7 Outdoor Fan motor lock, Overload
• E8 Outdoor Inverter input overcurrent
• E9 Outdoor Malfunction of EEV
• EA Outdoor Four way valve defective.
• F3 Outdoor Abnormal discharge pipe temperature
• F6 Outdoor Refrigerant overcharged
• FC Outdoor Low pressure drop.
• H3 Outdoor High pressure switch defect
• H4 Outdoor Low pressure switch defect
• H6 Outdoor Compressor motor position detection sensor error
• H7 Outdoor Fan motor position detection sensor error
• H8 Outdoor Current transformer error
• H9 Outdoor Malfunction of air thermistor
• J1 Outdoor Malfunction of pressure sensor
• J2 Outdoor Current sensor malfunction
• J3 Outdoor Malfunction of discharge pipe thermistor
• J4 Outdoor Low pressure saturation thermistor
• J5 Outdoor Malfunction of suction pipe thermistor
• J6 Outdoor Malfunction of heat exchanger thermistor
• J7 Outdoor Malfunction of heat exchanger liquid thermistor
• J8 Outdoor Malfunction of liquid pipe thermistor
• J9 Outdoor Malfunction of gas pipe thermistor
• JA Outdoor Malfunction of discharge pipe pressure sensor
• JC Outdoor Malfunction of suction pipe pressure sensor
• JH Outdoor Malfunction of oil temperature sensor
• L0 Outdoor Malfunction of inverter
• L3 Outdoor Electronic component box overheat
• L4 Outdoor Inverter cooling defect
• L5 Outdoor Comp motor ground fault, Short circuit
• L6 Outdoor Compressor motor grounding/short circuit
• L7 Outdoor Total input overcurrent
• L8 Outdoor Comp overload, Motor disconnected
• L9 Outdoor Compressor lock
• LAOutdoor Power unit malfunction
• LC Outdoor Transmission between inverter & outdoor
• P1 Outdoor Inverter over ripple
• P3 Outdoor Thermistor abnormality
• P4 Outdoor Power unit humidity sensor malfunction
• PJ Outdoor Failure of capacity set resistor
• U0 System Shortage of refrigerant or EEV failure
• U1 System Negative phase, Open phase
• U2 System Power supply insufficient
• U3 System Wiring check operation not executed
• U3 System Mismatch of indoor and outdoor units (Split only)
• U4 System Transmission between indoor units
• U5 System Transmission to remote controller
• U6 System Malfunction transmission outdoor to BP unit
• U7 System Transmission between outdoor units
• U7 Outdoor Malfunction between outdoor boards(RMX/RX RK)
• U8 System Transmission between master & slave R/C
• U9 System Transmission error between indoor to outdoor
• UA System Excessive number of fancoils
• UC System Address duplication of central controllers
• UE System Transmission error between indoor & central
• UF System Refrigeration system not set/wiring – piping
• UF System Terminals 1 and 3 crossed (Split/Skyair)
• UH System System error, Refrigeration system set up
• M1 System PCB defect
• M8 System Transmission error between central controllers
• MA System Improper combination of optional controllers
• MC System Address duplication, Improper setting
• 64 VAM Indoor unit air thermistor error
• 65 VAM Outside air thermistor error
• 68 VAM
• 6A VAM Damper system alarm
• 6A VAM Damper system and thermistor error
• 6F VAM Malfunction of remote controller
• 6H VAM Malfunction of door switch or connector
• 94 VAM Internal transmission error
• Grey fault codes, system still runs, but check ASAP

Error category : STC-DAIKIN A/C

• 0 N/A  No active error

Error category : Indoor Unit

• 17 A0 Indoor Unit External protection devices activated
• 18 A1 Indoor unit PCB assembly failure
• 19 A2 Interlock error for fan
• 20 A3 Drain level system error
• 21 A4 Temperature of heat exchanger (1) error
• 22 A5 Temperature of heat exchanger (2) error
• 23 A6 Fan motor locked, overload, over current
• 24 A7 Swing flap motor error
• 25 A8 Overcurrent of AC input
• 26 A9 Electronic expansion valve drive error
• 27 AA Heater overheat
• 28 AH Dust collector error / No-maintenance filter error
• 30 AJ Capacity setting error (indoor)
• 31 AE Shortage of water supply
• 32 AF Malfunctions of a humidifier system (water leaking)
• 33 C0 Malfunctions in a sensor system
• 36 C3 Sensor system of drain water error
• 37 C4 Heat exchanger (1) (Liquid pipe) thermistor system error
• 38 C5 Heat exchanger (1) (Gas pipe) thermistor system error
• 39 C6 Sensor system error of fan motor locked, overload
• 40 C7 Sensor system of swing flag motor error
• 41 C8 Sensor system of over-current of AC input
• 42 C9 Suction air thermistor error
• 43 CA Discharge air thermistor system error
• 44 CH Contamination sensor error
• 45 CC Humidity sensor error
• 46 CJ Remote control thermistor error
• 47 CE Radiation sensor error
• 48 CF High pressure switch sensor

Error category : Outdoor Unit

• 49 E0 Protection devices activated
• 50 E1 Outdoor uni9t PCB assembly failure
• 52 E3 High pressure switch (HPS) activated
• 53 E4 Low pressure switch (LPS) activated
• 54 E5 Overload of inverter compressor motor
• 55 E6 Over current of STD compressor motor
• 56 E7 Overload of fan motor / Over current of fan motor
• 57 E8 Over current of AC input
• 58 E9 Electronic expansion valve drive error
• 59 EA Four-way valve error
• 60 EH Pump motor over current
• 61 EC Water temperature abnormal
• 62 EJ (Site installed) Protection device activated
• 63 EE Malfunctions in a drain water
• 64 EF Ice thermal storage unit error
• 65 H0 Malfunctions in a sensor system
• 66 H1 Air temperature thermistor error
• 67 H2 Sensor system of power supply error
• 68 H3 High Pressure switch is faulty
• 69 H4 Low pressure switch is faulty
• 70 H5 Compressor motor overload sensor is abnormal
• 71 H6 Compressor motor over current sensor is abnormal
• 72 H7 Overload or over current sensor of fan motor is abnormal
• 73 H8 Sensor system of over-current of AC input
• 74 H9 Outdoor air thermistor system error
• 75 HA Discharge air thermistor system error
• 76 HH Pump motor sensor system of over current is abnormal
• 77 HC Water temperature sensor system error
• 79 HE Sensor system of drain water is abnormal
• 80 HF Ice thermal storage unit error (alarm)
• 81 F0 No.1 and No.2 common protection device operates.
• 82 F1 No.1 protection device operates.
• 83 F2 No.2 protection device operates
• 84 F3 Discharge pipe temperature is abnormal
• 87 F6 Temperature of heat exchanger(1) abnormal
• 91 FA Discharge pressure abnormal
• 92 FH Oil temperature is abnormally high
• 93 FC Suction pressure abnormal
• 95 FE Oil pressure abnormal
• 96 FF Oil level abnormal
• 97 J0 Sensor system error of refrigerant temperature
• 98 J1 Pressure sensor error
• 99 J2 Current sensor error
• 100 J3 Discharge pipe thermistor system error
• 101 J4 Low pressure equivalent saturated temperature sensor system error
• 102 J5 Suction pipe thermistor system error
• 103 J6 Heat exchanger(1) thermistor system error
• 104 J7 Heat exchanger(2) thermistor system error
• 105 J8 Oil equalizer pipe or liquid pipe thermistor system error
• 106 J9 Double tube heat exchanger outlet or gas pipe thermistor system error
• 107 JA Discharge pipe pressure sensor error
• 108 JH Oil temperature sensor error
• 109 JC Suction pipe pressure sensor error
• 111 JE Oil pressure sensor error
• 112 JF Oil level sensor error
• 113 L0 Inverter system error
• 116 L3 Temperature rise in a switch box
• 117 L4 Radiation fin (power transistor) temperature is too high
• 118 L5 Compressor motor grounded or short circuit, inverter PCB fault
• 119 L6 Compressor motor grounded or short circuit, inverter PCB fault
• 120 L7 Over current of all inputs
• 121 L8 Compressor over current, compressor motor wire cut
• 122 L9 Stall prevention error (start-up error) Compressor locked, etc.
• 123 LA Power transistor error
• 125 LC Communication error between inverter and outdoor control unit
• 129 P0 Shortage of refrigerant (thermal storage unit)
• 130 P1 Power voltage imbalance, open phase
• 132 P3 Sensor error of temperature rise in a switch box
• 133 P4 Radiation fin temperature sensor error
• 134 P5 DC current sensor system error
• 135 P6 AC or DC output current sensor system error
• 136 P7 Total input current sensor error
• 142 PJ Capacity setting error (outdoor)

Error category : System

• 145 U0 Low pressure drop due to insufficient refrigerant or electronic expansion valve error, etc.
• 146 U1 Reverse phase, Open phase
• 147 U2 Power voltage failure / Instantaneous power failure
• 148 U3 Failure to carry out check operation, transmission error
• 149 U4 Communication error between indoor unit and outdoor unit, communication error between outdoor unit and BS unit
• 150 U5 Communication error between remote control and indoor unit / Remote control board failure or setting error for remote control
• 151 U6 Communication error between indoor units
• 152 U7 Communication error between outdoor units / Communication error between outdoor unit and ice thermal storage unit
• 153 U8 Communication error between main and sub remote controllers (sub remote control error) / Combination error of other indoor unit / remote control in the same system (model)
• 154 U9 Communication error between other indoor unit and outdoor unit in the same system / Communication error between other BS unit and indoor/outdoor unit
• 155 UA Combination error of indoor/BS/outdoor unit (model, quantity, etc.), setting error of spare parts PCB when replaced
• 156 UH Improper connection of transmission wiring between outdoor and outdoor unit outside control adaptor
• 157 UC Centralized address duplicated
• 158 UJ Attached equipment transmission error
• 159 UE Communication error between indoor unit and centralized control device
• 160 UF Failure to carrey out check operation Indoor-outdoor, outdoor-outdoor communication error, etc.

Error category : Others

• 209 60 All system error
• 210 61 PC board error
• 211 62 Ozone density abnormal
• 212 63 Contamination sensor error
• 213 64 Indoor air thermistor system error
• 214 65 Outdoor air thermistor system error
• 217 68 HVU error (Ventiair dust-collecting unit)
• 219 6A Dumper system error
• 220 6H Door switch error
• 221 6C Replace the humidity element
• 222 6J Replace the high efficiency filter
• 223 6E Replace the deodorization catalyst
• 224 6F Simplified remote controller error
• 226 51 Fan motor of supply air over current or overload
• 227 52 Fan motor of return air over current / Fan motor of return air overload
• 228 53 Inverter system error (supply air side)
• 229 54 Inverter system error (return air side)
• 241 40 Humidifying valve error
• 242 41 Chilled water valve error
• 243 42 Hot water valve error
• 244 43 Heat exchanger of chilled water error
• 245 44 Heat exchanger of hot water error
• 258 31 The humidity sensor of return air sensor
• 259 32 Outdoor air humidity sensor error
• 260 33 Supply air temperature sensor error
• 261 34 Return air temperature sensor error
• 262 35 Outdoor air temperature sensor error
• 263 36 Remote controller temperature sensor error
• 267 3A Water leakage sensor 1 error
• 268 3H Water leakage sensor 2 error
• 269 3C Dew condensation error
• 339 M2 Centralized remote controller PCB error
• 345 M8 Communication error between centralized remote control devices
• 347 MA Centralized remote control devices inappropriate combination
• 349 MC Centralized remote controller address setting error

These Daikin Error Codes or Daikin Fault Codes, are useful to help resolve air conditioning issues. Else you can contact your nearest Daikin contractor to resolve for you.