Haier Hydro Split & All-in-One Systems

This error indicates a problem with the water inlet temperature sensor in the Hydro Unit (HU). The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the water outlet temperature sensor in the Hydro Unit (HU). The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the liquid pipe temperature sensor in the Hydro Unit (HU). The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the gas pipe temperature sensor in the Hydro Unit (HU). The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the EEPROM (Electrically Erasable Programmable Read-Only Memory) in the indoor unit, suggesting an internal communication or data storage issue.

The indoor unit is not receiving communication signals from the outdoor unit for more than 2 minutes, indicating a break in communication.

The indoor unit is not receiving correct data from the remote wired controller for 4 consecutive minutes, indicating a communication breakdown with the controller.

This error occurs if no water flow signal is detected after the water pump operates for 120 seconds, or if the water flow is lower than the set value. It can be caused by issues like crystallization on the pump rotor, especially after extended shutdown or with poor water quality.

This error indicates that there is a conflict in the address settings for the indoor units, meaning two or more units might be set to the same address.

This error indicates a problem with the Domestic Hot Water (DHW) tank temperature sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates that the communication signal from the I/O (Input/Output) board cannot be received for 2 minutes, suggesting a problem with the board or its connection.

This error indicates a problem with the temperature sensor for the water mixing valve in Hydro Unit Zone 2. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates that the micro switch input continuously detects water for 60 seconds, signaling a water leakage.

This error indicates that the low pressure switch (LP) has disconnected for 5 seconds, typically due to a very low flow rate in the system.

This error indicates that the system has detected conditions leading to anti-freeze protection activation, such as very low water temperatures in cooling mode.

This error indicates that the water temperature at either the inlet (Twi) or outlet (Two) of the Hydro Unit has exceeded 82°C for 5 seconds, triggering an overheating protection.

This error indicates a problem with the ambient temperature sensor for Hydro Unit Zone 1. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the ambient temperature sensor for Hydro Unit Zone 2. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the temperature sensor connected to the pool mixing valve water outlet or the pool water. The sensor might be disconnected or have an electrical fault (open or short circuit).

This code indicates a general malfunction or abnormal condition within the outdoor unit, without specifying a particular component.

This error indicates a problem with the outdoor condenser defrosting coil temperature sensor Te1. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the outdoor condenser defrosting coil temperature sensor Te2. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the outdoor ambient temperature sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the outdoor compressor suction temperature sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the compressor discharge temperature sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the compressor oil temperature sensor (Toil). The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates that the compressor oil temperature (Toil) has exceeded 110°C, triggering an over-high protection. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates a problem with the compressor discharge pressure sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the compressor suction pressure sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates that the high pressure switch (HPS) has disconnected, signaling an abnormal high pressure condition in the system. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates a problem with the outdoor subcooling coil outlet temperature sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a problem with the outdoor liquid pipe subcooling temperature sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates a communication failure with the EEPROM (Electrically Erasable Programmable Read-Only Memory) on the outdoor unit's PCB (Printed Circuit Board). This is an unresumable fault.

This error indicates that the compressor discharge temperature (Td) has exceeded 115°C, triggering an over-high protection. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates a problem with the four-way valve failing to reverse correctly, which impacts the unit's ability to switch between heating and cooling modes. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates that the compressor oil temperature (Toil) has remained too low for 5 continuous minutes, triggering an over-low protection. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates that the system's high pressure has been detected as abnormally low for 5 minutes. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates that the system's low pressure (Ps) has been detected as abnormally low for 5 minutes during either cooling or heating operation. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates that the compressor's compression ratio has exceeded 10.0 for one continuous minute after starting, leading to a shutdown and alarm.

This error indicates that the system's high pressure (Pd) has exceeded 41.5 kg or a critical temperature (Pd_temp) for 5 consecutive minutes. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates that the compressor discharge temperature (Td) is abnormally low during normal operation (Td < Pd+10℃ for 5 minutes). If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates that the module board signal is not being received or contains incorrect data for 30 consecutive seconds. The system will automatically restore itself if correct data is received.

This error indicates that the low pressure switch (LP) has disconnected for 5 seconds, reporting a fault. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates that the LEVa driver chip has detected an overcurrent condition.

This error indicates that the LEVb driver chip has detected an overcurrent condition.

This error indicates a problem with the LEVa (Liquid Electronic Valve) connection, likely a disconnection detected by the LEV driver chip.

This error indicates a problem with the LEVb (Liquid Electronic Valve) connection, likely a disconnection detected by the LEV driver chip.

This error indicates that the compressor's current sensor sampling value is too low after operating at a high frequency (>= 50Hz) for 5 minutes, or there is an issue with the current sensor itself.

This error indicates that the signal from the subcooling module board is not received or contains incorrect data for 2 consecutive minutes. The system will automatically restore itself if correct data is received.

This error, sent by the subcooling module, indicates a communication failure between the subcooling module and the main PCB (Printed Circuit Board).

This error, sent by the subcooling module, indicates that the subcooling module is not connected to the Tc1 temperature sensor.

This error, sent by the subcooling module, indicates that the subcooling module is not connected to the Tc2 temperature sensor.

This error occurs when the system detects a subcooling module, but the dip switch setting for the subcooling module is incorrect or not configured. This is an unresumable fault.

This error indicates that the CT (Current Transformer) current has exceeded the specified value for 5 consecutive seconds, indicating an electrical overload. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates a problem with the electrical control box temperature sensor (Tb). The sensor might be disconnected or have an electrical fault (open or short circuit).

This error indicates that the signal from the DHW (Domestic Hot Water) I/O PCB is not received or contains incorrect data for 2 consecutive minutes. The system will automatically restore itself if correct data is received.

This error indicates a problem with the DHW (Domestic Hot Water) I/O PCB's tank temperature sensor. The sensor might be disconnected or have an electrical fault (open or short circuit).

This is a reserved error code indicating a general abnormality with the DHW (Domestic Hot Water) I/O PCB.

This error indicates a problem with the upper DC fan motor, specifically if its operation is below 20 rpm for 40 seconds or less than 20% of the target value. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

This error indicates a problem with the lower DC fan motor, specifically if its operation is below 20 rpm for 40 seconds or less than 20% of the target value. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.