Haier Air Conditioning

The compressor discharge temperature has exceeded 115°C. The error will clear within 3 minutes if the temperature drops below this threshold. If it happens 3 times in an hour, the system will lock.

The DC fan motor is damaged, not connected, or its related circuit is broken. The error status will confirm and lock if this occurs 3 times within 30 minutes.

The compressor motor is desynchronizing, which can be caused by overload, sudden load fluctuations, a faulty compressor current sensor circuit, or a missing inverter gate drive signal.

The driver module has detected a failure in the compressor's startup sequence. This can be due to power supply issues, incorrect wiring, or problems with the power module or compressor itself, or system overload.

The compressor drive module's input current is too high, exceeding 32A for double-fan models or 27A for single-fan models. If this occurs 3 times in an hour, it will lock the system.

The high pressure switch circuit has been detected as open for 30 seconds after the compressor has been running for 3 minutes. If this error occurs 3 times within an hour, it will lock the system.

The low pressure switch circuit has been detected as open for 60 seconds after the compressor has been running for 3 minutes, or open for 30 seconds while the system is in standby.

This error indicates that the system's high pressure has been detected as being too high. This can happen if the indoor pipe temperature and outdoor pipe temperature are too low in cooling mode, or if the outdoor temperatures are too low when heating.

This error means the system has detected low pressure. This can occur if the indoor and outdoor pipe temperatures are too low during cooling mode, or if the outdoor temperatures are too low during heating.

The EEPROM on the main circuit board cannot read or write data. This means the system may not be able to store or access important settings.

The Inverter Power Module (IPM) has failed or detected that the compressor is drawing too much electrical current. This can prevent the compressor from running correctly.

The outdoor unit's overcurrent protection has been triggered. This means too much electrical current is flowing, potentially causing damage.

The Inverter Power Module (IPM) is not able to communicate with the main circuit board (PCB). This prevents them from coordinating operations.

The IPM is protecting the compressor from an overload condition. This indicates the compressor is working too hard and risks damage.

The operating voltage supplied to the unit is either too high or too low. This can cause inefficient operation or damage.

The temperature of the hot gas leaving the compressor is too high. The system has tried to reduce this temperature, but the condition persists.

The outdoor fan motor is not running. The main circuit board detects this fault quickly and will shut off the system.

There is an electrical failure with the sensor that monitors the outdoor coil temperature during the defrost cycle. This sensor is connected to the PCB.

There is an electrical failure with the sensor that measures the temperature of the gas entering the compressor. This sensor is connected to the PCB.

There is an electrical failure with the sensor that measures the outdoor air temperature. This sensor is connected to the PCB.

There is an electrical failure with the sensor that measures the temperature of the hot gas leaving the compressor. This sensor is connected to the PCB.

The outdoor unit control board cannot communicate with the indoor unit control board for an extended period. This prevents the system from operating.

This error code indicates the system may not have enough refrigerant. This can lead to poor performance and potential damage.

The 4-way valve, which directs hot gas flow for heating or cooling, is not switching correctly. This prevents the system from changing modes properly.

The compressor's internal windings are losing synchronization during speed changes. This can happen when speeding up or slowing down the compressor.

This error relates to a detection error within the unit's operational loop, often referring to a control or sensor circuit.

An indoor component has experienced a thermal overload, likely due to restricted airflow or a malfunctioning motor.

The indoor unit's cooling coil has frozen over with ice. This can happen if there's not enough heat, the indoor temperature is too low, or airflow is blocked.

The temperature sensor within the Inverter Power Module (IPM) has detected an overheat condition. This can be caused by overcharging or a dirty system.

The compressor failed to start when the system called for operation. The error may disappear after a power cycle, but could indicate a PCB issue.

The IPM has detected that the compressor is drawing too much current. This could be due to several factors affecting the compressor's operation.

This indicates the main circuit board (PCB) has reset. This often happens when the system experiences low line voltage conditions.

The circuit responsible for detecting the current flowing through the IPM is malfunctioning. This prevents accurate monitoring of compressor current.

These codes indicate a failure in a liquid or gas temperature sensor connected to an indoor unit's Electronic Expansion Valve (EEV) circuit. The specific sensor affected is identified on the outdoor unit's Error Code Decal.

This code indicates a problem with the temperature sensor located near the IPM's heat sink, or a brief loss of power was detected. This sensor helps protect the IPM from overheating.

There is an electrical failure with the sensor that measures the condensing temperature of the outdoor coil. This sensor is connected to the PCB.

There is an electrical failure with the gas pipe temperature sensor for indoor unit E. This sensor is part of the EEV circuit and connects to the PCB.

This code indicates an electrical failure of the 'Toci' sensor. This sensor is important for ensuring there is no drop in hot gas temperature through the 4-way valve.

The high pressure switch in the system has opened, indicating that the system pressure is too high. This protects the compressor from excessive pressure.

The low pressure switch in the system has opened, indicating that the system pressure is too low. This can lead to insufficient cooling or heating.

The system is operating at excessive refrigerant pressure. This is often caused by an overcharge, especially in new installations.

The system pressure is too low. This can be caused by a lack of refrigerant or issues with heat transfer in the coils.

The 'BP' display indicates that the start-up test has been successfully bypassed. The unit will then go into standby mode.

The system is performing an initial start-up check after installation. The indoor and outdoor units will display 'CC' for 5 seconds.

This error means the sensor responsible for measuring the indoor room temperature is not working correctly. This can affect how the air conditioner controls the room temperature.

This code indicates a malfunction with the sensor that measures the temperature of the refrigerant pipes. This sensor is crucial for the unit's operation and protection.

This error means the Indoor unit's EEPROM, a type of memory chip, has failed or has corrupted data. This can prevent the unit from operating correctly.

This error signifies a problem with the EEPROM (Electrically Erasable Programmable Read-Only Memory) on either the indoor (E4) or outdoor (F12) unit. This memory stores vital operating data.

The air conditioner has activated its anti-frosting protection, usually because the indoor coil temperature is too low. This can happen if airflow is restricted or if there's an issue with the refrigerant.

This error indicates a problem with the communication link between the indoor and outdoor parts of your air conditioner. It could be a wiring issue or a problem with the main circuit boards.

On all-in-one board systems, this error (indicated by 15 flashes on the outdoor unit's LED2) signifies a communication breakdown between the indoor and outdoor units. This usually points to wiring or PCB problems.

This error signals that the indoor unit is overloaded while operating in heating mode. This could be due to issues with the refrigerant pipes or the fan motor.

This indicates a problem with the fan motor in the indoor unit. The fan is essential for circulating air, so a malfunction will affect performance.

This error indicates a problem with communication between the indoor and outdoor units. It might mean the signal is being blocked or lost.

This error indicates that the Intelligent Power Module (IPM) has detected a protection event. This module manages power to components like the compressor.

The air conditioner has detected a sudden, high surge of electrical current to the compressor. This can happen due to electrical issues or if the compressor is malfunctioning.

There is a communication breakdown between the Power Module and the main Printed Circuit Board (PCB) in the outdoor unit. This prevents them from working together correctly.

This error indicates a communication failure specifically between the Power Module and the main outdoor Printed Circuit Board (PCB).

The compressor's discharge temperature has exceeded a safe limit. This protection is in place to prevent damage to the compressor.

This protection activates when the compressor discharge temperature exceeds 110°C. It can be caused by refrigerant issues, faulty sensors, or electronic expansion valve problems.

The module has experienced a thermal overload, indicating it has overheated. This could be due to poor ventilation or excessive operating conditions.

This error indicates that the sensor measuring the outside air temperature is malfunctioning. This sensor is important for the unit's operational efficiency.

The sensor that measures the suction temperature of the refrigerant is not working correctly. This affects the unit's ability to manage the cooling cycle.

This error code points to a problem with the DC fan motor in the outdoor unit. The fan is critical for heat exchange.

This code indicates that the power module has undergone a reset. This could be due to a temporary power fluctuation or an internal module issue.

The temperature sensor for the liquid pipe of indoor unit A has malfunctioned. This sensor monitors refrigerant temperature.

The system is having trouble detecting the precise position of the compressor's rotor. This is critical for the compressor's smooth operation.

These codes mean the system cannot correctly detect the position of the compressor's rotor. This is essential for its operation. It could be due to wiring issues or a damaged compressor.

This error indicates a problem with the EEPROM (Electrically Erasable Programmable Read-Only Memory) on the outdoor unit. This memory stores important configuration data.

The system detects an insufficient amount of refrigerant. This can lead to poor cooling/heating performance and potential damage.

The 4-way reversing valve, which controls the direction of refrigerant flow for heating and cooling, has failed or is not operating correctly.

The temperature sensor for the liquid pipe of indoor unit B has malfunctioned. This sensor monitors refrigerant temperature.

The temperature sensor for the liquid pipe of indoor unit C has malfunctioned. This sensor monitors refrigerant temperature.

The temperature sensor for the liquid pipe of indoor unit D has malfunctioned. This sensor monitors refrigerant temperature.

The unit has detected that the incoming power supply voltage is either too high or too low. This can damage internal components.

The system's internal pressure has exceeded a safe maximum level. This could be due to restricted airflow, too much refrigerant, or other system blockages.

This error means the sensor monitoring the temperature of the outdoor coil has failed or is providing incorrect readings.

The outdoor unit is experiencing an AC overcurrent condition. This means too much electrical current is flowing, which can indicate a component issue.

These codes indicate that the compressor is drawing too much electrical current. This can be caused by power supply issues, or problems with the compressor itself or its driver module.

This error indicates overcurrent in one of the phases (U, V, or W) powering the compressor. This is a serious electrical issue.

The Current Transformer (CT) detection circuit, used to monitor current, is reporting abnormal readings. This indicates a potential issue with power monitoring.

The sensor that measures the compressor's discharge temperature is providing abnormal readings or has failed.

The temperature sensor for the gas pipe of indoor unit E has malfunctioned. This sensor monitors refrigerant temperature.

There is a fault in the circuit responsible for sampling the current flowing to the compressor. This affects the unit's ability to monitor compressor load.

This error indicates a problem with the circuit that detects the rotational position of the compressor's motor. This is necessary for proper startup and operation.

The temperature sensor for the gas pipe of indoor unit A has malfunctioned. This sensor monitors refrigerant temperature.

The temperature sensor for the gas pipe of indoor unit B has malfunctioned. This sensor monitors refrigerant temperature.

The temperature sensor for the gas pipe of indoor unit C has malfunctioned. This sensor monitors refrigerant temperature.

The temperature sensor for the gas pipe of indoor unit D has malfunctioned. This sensor monitors refrigerant temperature.

The temperature sensor for the liquid pipe of indoor unit E has malfunctioned. This sensor monitors refrigerant temperature.

The driver board responsible for controlling the compressor has failed. This board manages the power and signals to the compressor.

The temperature sensor monitoring the condensing unit has malfunctioned. This sensor is important for regulating system pressure and temperature.

The sensor labeled 'Toci' (likely related to a specific temperature point) has malfunctioned. This sensor is critical for system control.

The high pressure switch in the system has activated and shut off operation. This is a safety measure to prevent damage from excessive pressure.

The low pressure switch in the system has activated and shut off operation. This is a safety measure to prevent damage from low pressure conditions.

The system is protected due to high pressure. This is caused by too much refrigerant, high condensing temperatures, or a malfunctioning fan motor.

The system is protected due to low pressure. This is caused by refrigerant shortage, low defrosting temperatures, or a malfunctioning fan motor.

This error suggests an incompatibility issue, likely between different internal components or software versions of the unit. It might occur after a firmware update or part replacement.

The system's built-in sensor has detected a malfunction related to refrigerant leak detection. This could mean the sensor itself is faulty or there's an issue with the detection system.

The system has detected that the outdoor ambient temperature is too low for normal operation. This is a safety measure to prevent damage.

The system is running a heating mode test. This display may appear during the start-up system check.

The system is running a cooling mode test. This display may appear during the start-up system check.

The indoor and outdoor displays show 'PS' after the system has successfully completed its start-up checks. The unit is now ready for normal use.