Daikin AC Error Codes

AC BrandsDaikin

Daikin Ac Error Codes

  1. Split AC Error Codes
  2. L Series AC Error Codes
  3. Multi AC Error Codes
  4. VRV  IV 4 Error Codes
  5. VRV III 3 Error Codes

1-Daikin Split AC Error Codes:

Error CodesProblem
00Normal
UA Indoor-outdoor Unit Combination Fault
U0 Refrigerant Shortage
U2Drop Voltage Or Main Circuit Overvoltage
U4 Failure Of Transmission (Between Indoor Unit And Outdoor Unit)
A1Indoor Pcb Defectiveness
A5 High-Pressure Control Or Freeze-up Protector
A6Fan Motor Fault
C4 Faulty Heat Exchanger Temperature Sensor
C9Faulty Suction Air Temperature Sensor
EACooling-heating Switching Error
E1Circuit Board Fault
E5 OL Started
E6 Faulty Compressor Start-Up
E7 DC Fan Motor Fault
F3 High Temperature Discharge Pipe Control
F6 High Pressure Control (In Cooling)
H0Sensor Fault
H6Operation Halt Due To Faulty Position Detection Sensor
H8DC Current Sensor Fault
H9 Faulty Suction Air Temperature Sensor
J3 Faulty Discharge Pipe Temperature Sensor
J6 Faulty Heat Exchanger Temperature Sensor
L3 Electrical Parts Heat Fault
L4 High Temperature At Inverter Circuit Heatsink
L5Output Overcurrent
P4Faulty Inverter Circuit Heatsink Temperature Sensor
2- Daikin L Series AC Error Codes:
Error Codes Meaning
System Error Codes
00Normal
U0U0
U2Low-voltage detection or over-voltage detection
U4Signal transmission error (between indoor unit and outdoor unit)
UAUnspecified voltage (between indoor unit and outdoor unit)
Indoor Unit Error Codes
A1Indoor unit PCB abnormality
A5Freeze-up protection control or heating peak-cut control
A6Fan motor or related abnormality
C4Indoor heat exchanger thermistor or related abnormality
C9Room temperature thermistor or related abnormality
Outdoor Unit Error Codes
E1Outdoor unit PCB abnormality
E5OL activation (compressor overload)
E6Compressor lock
E7DC fan lock
E8Input overcurrent detection
EAFourWay valve abnormality
F3Discharge pipe temperature control
F6High-pressure control in cooling
H0Compressor system sensor abnormality
H6Position sensor abnormality
H8DC voltage / current sensor abnormality - CT or related abnormality
H9Outdoor temperature thermistor or related abnormality
J3Discharge pipe thermistor or related abnormality
J6Outdoor heat exchanger thermistor or related abnormality
L3Electrical box temperature rise
L4Radiation fin temperature rise
L5Output overcurrent detection
P4Radiation fin thermistor or related abnormality
U7Signal transmission error on outdoor unit PCB

Indoor Unit PCB Abnormality;

Remote Controller Display: A1

Supposed Causes:

  • When We This Error The Problem Is interconnected Is Wrong models
  • Defective indoor unit PCB After See This Error
  • Disconnection of connector
  • Reduction of power supply voltage

Remote Controller Display: A5

Supposed Causes:

  • When You See This Error So You Ac Is Short-circuited air
  • Clogged air filter of the indoor unit When We See A5 Error
  • After See This Error That Means Dust accumulation on the indoor heat exchanger
  • Defective indoor heat exchanger thermistor
  • When This happens Your Ac Have Defective indoor unit PCB

Remote Controller Display: A6

Supposed Causes:

  • After See This Error That Means Layer short inside the fan motor winding
  • Breaking of wire inside the fan motor
  • Breaking of the fan motor lead wires
  • When On Display Is A6 Means Defective capacitor of the fan motor
  • After Again And Again See This Error Maybe Defective indoor unit PCB

Remote Controller Display: C4, C9

Supposed Causes:

  • Disconnection of connector
  • thermistor Defective
  • Defective indoor unit PCB

Solve Daikin Ac Troubleshooting

Remote Controller Display: U0

Supposed Causes:

  • Disconnection of the discharge pipe thermistor, indoor or outdoor heat exchanger thermistor, room or outdoor temperature thermistor
  • Closed stop valve
  • Refrigerant shortage (refrigerant leakage)
  • Poor compression performance of compressor
  • Defective electronic expansion valve

Remote Controller Display: U2

Supposed Causes:

  • Supply voltage is not as specified.
  • DC voltage detection circuit
  • e over-voltage detection circuit
  • PAM control part
  • Disconnection of compressor harness
  • When See U2 That Means Maybe Noise Problem
  • Momentary fall of voltage
  • Momentary power failure
  • Defective indoor unit PCB

Remote Controller Display: U4

Supposed Causes:

  • First Cause Of This Error Is Wiring error
  • Breaking of the connection wires between the indoor and outdoor units (wire No. 3)
  • outdoor unit PCB Is Faulty
  • Defective indoor unit PCB
  • Disturbed power supply waveform
Remote Controller Display: U7

Supposed Causes: That Means Defective Is outdoor unit PCB

Remote Controller Display: UA

Supposed Causes:

  • Wrong models interconnected
  • wiring of connecting wires Is Wrong
  • Wrong indoor unit PCB or outdoor unit PCB mounted
  • Defective indoor unit PCB
  • Defective outdoor unit PCB

Remote Controller Display: E1

Supposed Causes:

  • outdoor unit PCB Defective
  • Broken harness between PCBs
  • Noise
  • Momentary fall of voltage
  • Momentary power failure, etc

Remote Controller Display: E5

Supposed Causes:

  • Discharge pipe thermistor
  • Defective electronic expansion valve or coil
  • When You See This Error That Means FourWay valve or coil Is Faulty
  • After Again See This Error Defective outdoor unit PCB
  • Refrigerant shortage Problem When We See This
  • Water mixed in refrigerant
  • Defective stop valve

Remote Controller Display: E6

  • Compressor locked After This Error Show On Display
  • When We See E6 Error Compressor harness disconnected

Remote Controller Display: E7

Supposed Causes:

  • Foreign matter stuck in the fan
  • When You See This E7 That Means Defective fan motor
  • outdoor unit PCB Is Faulty After We See This Error

Remote Controller Display: E8

Supposed Causes:

  • After See This Error On Display Means Outdoor temperature is out of operation range.
  • Wen We See This Error Means Defective compressor
  • power module Is Faulty When We See This
  • Faulty Is outdoor unit PCB
  • Short circuit

Remote Controller Display: EA

Supposed Causes:

  • Disconnection of fourway valve coil
  • Defective fourway valve, coil, or harness
  • After See This Error On Diplay MAybe outdoor unit PCB
  • thermistor Is Faulty
  • Refrigerant shortage
  • Water mixed in refrigerant When You See This
  • After Again See This Error That Means stop valve Is Not Good

Remote Controller Display: F3

Supposed Causes:

  • When See This Error Maybe discharge pipe thermistor
  • Fault In electronic expansion valve or coil
  • When See This Is Error Means Refrigerant shortage
  • Defective fourway valve
  • Water mixed in refrigerant
  • stop valve Is Faulty
  • PCB Of Outdoor Unit Is Defective

Remote Controller Display: F6

Supposed Causes:

  • The installation space is not large enough.
  • Dirty outdoor heat exchanger
  • outdoor fan motor
  • stop valve
  • electronic expansion valve or coil
  • outdoor heat exchanger thermistor
  • outdoor unit PCB

Remote Controller Display: H0

Supposed Causes:

  • Broken or disconnected harness
  • outdoor unit PCB Is Faulty

Remote Controller Display: H6

Supposed Causes:

  • Disconnection of the compressor relay cable
  • compressor Not Good
  • teoutdoor unit PCB Is not Good
  • Start-up failure caused by the closed stop valve
  • Input voltage is outside the specified range.

Remote Controller Display: H8

Supposed Causes:  outdoor unit PCB Is Not Working

Remote Controller Display: H9, J3, J6, P4

Supposed Causes:

  • Disconnection of the connector for the thermistor
  • thermistor corresponding to the error code
  • heat exchanger thermistor in the case of J3 error
  • outdoor unit PCB

Remote Controller Display: L3

Supposed Causes:

  • outdoor fan motor
  • When Again See This That Means Short circuit
  • Radiation fin thermistor Is Faulty When You See This
  • Disconnection of connector
  • PCB Of Outdoor Unit Is Faulty

Remote Controller Display: L4

Supposed Causes:

  • When We L4 Error That Means fan motor Of Outdoor Unit Is Faulty
  • And The Second Issue Is Short circuit
  • And The Another One is Defective radiation fin thermistor
  • When See This Error 4th Issue Is Disconnection of connector
  • After Face L4 Maybe outdoor unit PCB
  • When You See L4 Is On Display Maybe That Means Silicon grease is not applied properly on the radiation fin after replacing the outdoor unit PCB.

Remote Controller Display: L5

Supposed Causes:

  • When L5 On Display That Means Poor installation condition
  • And Second One Is Closed stop valve
  • After See L5 Maybe power module Is Faulty
  • If We Face Again That Means Wrong internal wiring
  • L5 Error Other Means Abnormal power supply voltage
  • When You See Again This Problem In outdoor unit PCB
  • After Again And Again See This Error Last Means Your compressor Is Not Working

Service Check Function

  1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen.
  2. After That Press the timer cancel button repeatedly until a long beep sounds.

3-Daikin Multi-Split Type AC Error Codes:

Daikin’s multi-split type air conditioning systems offer superior performance, energy-efficiency, and comfort in stylish solutions conforming to all interior spaces and lifestyles.

An extensive product lineup utilizes Daikin technology for lower costs and environmental impact. Advanced inverter and heat pump technologies achieve greater efficiency and energy-savings at lower costs.

A broad array of models allows the perfect match of style and performance to any interior space.

2/3/4MXS-G/J Series/Heat Pump

Error CodesProblem
00Normal
UAIndoor-Outdoor Unit Combination Fault
U0Refrigerant Shortage
U2Drop Voltage or Main Circuit Overvoltage
U4Failure Of Transmission (Between Indoor Unit and Outdoor Unit)
A1Indoor PCB Defectiveness
A5High Pressure Control or Freeze-up Protector
A6Fan Motor Fault
C4Faulty Heat Exchanger Temperature Sensor
C9Faulty Suction Air Temperature Sensor
EACooling-Heating Switching Error
E1Circuit Board Fault
E5OL Started
E6Faulty Compressor Start Up
E7DC Fan Motor Fault
E8Overcurrent Input
F3High Temperature Discharge Pipe Control
F6High Pressure Control (In Cooling)
H0Sensor Fault
H6Operation Halt Due To Faulty Position Detection Sensor
H8DC Current Sensor Fault
H9Faulty Suction Air Temperature Sensor
J3Faulty Discharge Pipe Temperature Sensor
J6Faulty Heat Exchanger Temperature Sensor
L3Electrical Parts Heat Fault
L4High Temperature At Inverter Circuit Heatsink
L5Output Overcurrent
P4Faulty Inverter Circuit Heatsink Temperature Sensor

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