Daikin Air Conditioner

This code signifies that the air conditioner is operating normally and no faults have been detected. It is displayed when accessing the error code menu.

An external protection device has been activated, which is preventing the air conditioner from operating.

This indicates a fault with the main circuit board inside the indoor unit. This part controls the unit's functions.

The system has detected conditions that could lead to freezing, possibly due to restricted airflow or low refrigerant.

The unit has detected a high water level, likely in the condensate drain system.

The system has activated freezing protection. This is often due to insufficient airflow over the indoor coil.

The air conditioner is in a protection mode, either for heating or to prevent freezing during cooling.

This indicates a problem with the fan motor in the indoor unit. The fan is responsible for circulating air.

The motor that controls the air outlet louvres (vents) has failed.

There is an issue with the power supply to the indoor unit.

The Electronic Expansion Valve (EEV) has a defect or is not functioning correctly.

You hear a sound that is not normal during operation. This could indicate various issues with the unit's components.

Similar to A9, this code indicates a malfunction with the electronic expansion valve that regulates refrigerant flow.

The heating element in the unit has overheated, likely due to airflow obstruction or a faulty sensor.

A high water level has been detected while the thermostat is off. This is similar to A3 but specific to thermo-off.

There is a defect with the dust collection system or its element.

The system's capacity settings are incorrect or missing.

A single beep sound is heard when a setting is changed using the remote controller or ON/OFF switch. This confirms the setting has been registered.

Two short beeps are heard when the operation is started using the ON/OFF switch or remote controller. This confirms the start command.

A long beep sound is heard when the operation is stopped using the ON/OFF switch or remote controller. This confirms the stop command.

A burning smell is detected coming from the unit. This is a critical safety warning indicating a potential fire risk.

A general sensor malfunction has been detected within the indoor unit.

Communication has failed between the main and sub printed circuit boards (PCBs).

The sensor that monitors the water level in the drain pan or line is not working correctly.

This code points to an issue with the sensor that measures the temperature of the heat exchanger. Accurate readings are vital for operation.

The sensor measuring the temperature of the suction pipe has an open or short circuit.

The driver controlling the fan motor has failed.

The motor responsible for operating the front panel has a fault.

The system's sensor for monitoring incoming AC current is faulty.

The sensor measuring the temperature of the air returning to the unit is open or short circuited.

The sensor measuring the temperature of the air being discharged from the unit is open or short circuited.

The humidity sensor within the unit has failed.

The temperature sensor located within the switch box of the indoor unit is malfunctioning.

The high-pressure safety switch has activated or is malfunctioning.

Indicates a problem with the air cleaner's dust collection system.

The circuit breaker trips repeatedly, cutting off power to the unit. This suggests an electrical problem or the unit drawing too much power.

The sensor connected to the remote controller has a defect.

One or more protection devices in the outdoor unit have been triggered.

There is a defect with the main circuit board in the outdoor unit.

The system's earth leakage detection system has an issue, possibly a faulty sensor or connection.

The high-pressure switch in the outdoor unit has been tripped.

The low-pressure switch in the outdoor unit has been tripped.

This code signifies that the system has detected an overload condition, possibly due to overcurrent. This is a protective shutdown.

The Direct-On-Line (DOL) compressor has locked up, likely due to high current draw.

The fan motor in the outdoor unit has failed.

The inverter compressor is drawing excessive current.

The Electronic Expansion Valve (EEV) motor in the outdoor unit has failed.

The 4-way valve, which changes the system's operation between heating and cooling, has a defect.

The temperature of the water entering the unit is abnormal.

There is a defect within the thermal storage unit's components.

A 'wet alarm' suggests a moisture detection issue, possibly related to leaks or condensation.

System pressure is too high, likely due to too much refrigerant.

The high-pressure switch (HPS) has activated due to excessively high system pressure.

The compressor is reporting abnormal oil pressure, which is critical for lubrication.

This code indicates that the discharge pipe temperature has become too high, triggering a safety control. This often relates to airflow or system load.

The oil within the compressor has become excessively hot.

This code is specific to systems with an engine (like a generator backup) and indicates high exhaust temperature.

This code means that during cooling operation, the system's internal pressure has become too high, activating a safety protection.

All sensors related to the compressor system have become disconnected.

The damper system for the humidifier is experiencing a failure.

Either the room temperature sensor or the damper for the humidifier unit is faulty.

The high-pressure switch has an open circuit, indicating a potential pressure issue or switch failure.

The low-pressure switch has an open circuit, suggesting a possible pressure issue or switch fault.

The sensor designed to detect compressor overload has failed.

This code indicates that the unit has stopped operating because a position detection sensor is faulty. This sensor helps the unit know its orientation or component positions.

The signal related to the fan motor operation is faulty.

There is an error with the input signal to the compressor.

The sensor measuring the outside ambient temperature has failed (open or short circuit).

The temperature sensor measuring the outdoor air temperature is malfunctioning.

A pressure sensor within the system has failed.

The sensor that measures electrical current has failed.

This indicates that the sensor measuring the temperature of the discharge pipe is not working correctly. This sensor is important for monitoring system performance.

The sensor for the outdoor coil's vapour line has an open or short circuit.

The sensor measuring the temperature of the suction pipe has an open or short circuit.

This code indicates a fault with the temperature sensor for the heat exchanger. This sensor is critical for efficient operation.

The sensor measuring the temperature of the liquid pipe has an open or short circuit.

Another sensor for the liquid pipe temperature has an open or short circuit.

The sensor for the sub-cool heat exchanger has an open or short circuit.

The sensor that measures high pressure has an open or short circuit.

The sensor that measures low pressure has an open or short circuit.

The sensor measuring the oil temperature has an open or short circuit.

There is a failure within the inverter system of the air conditioner.

The main circuit board for the inverter system has failed.

The temperature inside the electrical box has exceeded 120°C while the compressor is off.

The temperature of the unit's fins has exceeded 93°C.

The inverter system experienced a sudden surge in DC over current.

The green OPERATION lamp is blinking, indicating a potential system error. The unit may have stopped functioning or is not operating correctly.

The OPERATION lamp is blinking, and the unit has stopped. This often means something is blocking the airflow to or from the indoor or outdoor unit.

The unit stops operating temporarily, but the OPERATION lamp remains on. This usually happens to protect the system from sudden large changes in voltage.

This indicates a fault with the temperature sensor monitoring the heatsink of the inverter circuit. This sensor is crucial for preventing overheating.

The power cord feels unusually hot to the touch or shows signs of damage. This is a serious safety hazard.

A control button or switch on the unit or remote control is not functioning as expected. This can make it difficult to operate the unit.

This code indicates a potential issue with the amount of refrigerant in the system. Low refrigerant can affect cooling or heating performance.

This code indicates that the system has detected either a voltage drop or an overvoltage. This can temporarily stop operation to protect the unit.

This code means there is a problem with the communication signal between the indoor and outdoor units. This prevents them from working together correctly.

This code indicates a fault related to how the indoor and outdoor units are communicating or operating together. It's a general combination error.

Water is observed leaking from the indoor unit. This could be due to a blocked drain or other internal issues.