Haier Air Conditioners

When the 'SELF-CLEAN' button is pressed, 'CL' appears on the indoor unit's display and the remote controller, indicating the self-cleaning cycle is running.

The sensor that measures the room temperature inside the indoor unit is malfunctioning or has failed, preventing accurate temperature readings.

The fan motor inside the indoor unit is not operating correctly or has failed. This prevents proper air circulation and can impact cooling or heating performance.

The sensor measuring the temperature of the indoor coil (evaporator) is not working correctly, which can affect the unit's ability to cool or heat efficiently.

The indoor unit's display shows 'E4', indicating an error with the internal EEPROM (Electrically Erasable Programmable Read-Only Memory) data or the EEPROM itself is damaged. This affects the indoor unit's main control.

The indoor unit has detected a temperature that is too low, activating antifreeze protection to prevent damage. This usually occurs if the indoor coil gets too cold.

The indoor and outdoor units are unable to communicate with each other. This can be caused by issues with the control boards or the wiring connecting them.

The indoor unit displays 'E7' and the outdoor unit's LED1 flashes 15 times, indicating a communication fault between the indoor and outdoor PCBs on a split board system. This can be due to wiring issues or component failures.

The indoor unit displays 'E7' and the outdoor unit's LED2 flashes 15 times, indicating a communication fault between the indoor and outdoor PCBs on an all-in-one board system. This can be due to wiring issues or component failures.

The indoor unit is experiencing an overload condition, particularly when operating in heating mode. This is a protective measure to prevent damage.

The Intelligent Power Module (IPM) has activated its protection function, usually due to abnormal operating conditions within the power supply circuit.

The compressor is jammed or there is a loss of synchronism in its operation, preventing it from functioning correctly.

The system cannot detect the normal position of the compressor rotor. This can be caused by incorrect or poor wiring to the compressor, or the compressor itself may be damaged. The outdoor unit's LED1 will flash 18 or 19 times.

The EEPROM (Electrically Erasable Programmable Read-Only Memory) on the outdoor unit's main board has a malfunction, affecting critical operational data storage.

The outdoor unit's LED1 flashes once, indicating an error with the outdoor unit's EEPROM data or the EEPROM itself is damaged. This affects the outdoor unit's main control.

The system has detected a low level of refrigerant, which is essential for the air conditioner's cooling and heating cycles.

The 4-way valve, which controls the direction of refrigerant flow for switching between heating and cooling modes, is malfunctioning.

The outdoor terminal block, where electrical connections are made, has become too hot, triggering a safety shutdown to prevent electrical hazards.

The outdoor unit has detected that the incoming power voltage is either too high or too low, triggering a safety shutdown to protect internal components.

The compressor has experienced a sudden, high surge of current, leading to an immediate shutdown for protection against electrical damage.

The system has detected excessively high pressure, activating a protective shutdown to prevent damage to the refrigerant system and compressor.

The sensor measuring the temperature of the outdoor coil or piping is malfunctioning, which can affect the unit's ability to operate efficiently, especially during defrost cycles.

The outdoor unit has detected an excessive alternating current, triggering a safety shutdown to prevent damage to electrical components.

The air conditioner detects that the compressor is drawing too much electrical current. This indicates an issue with internal components or the power supply. The outdoor unit's LED1 will flash 3, 24, or 25 times.

One or more phases of the compressor's electrical supply have experienced an overcurrent condition, indicating an electrical imbalance or fault.

The Current Transformer (CT) sensor, which monitors current flow, is detecting abnormal current levels, triggering a protection shutdown.

The sensor that monitors the compressor's discharge temperature is not functioning correctly, which is critical for compressor protection and performance.

During the 'SELF-CLEAN' operation, if the outdoor ambient temperature falls below freezing, the system displays F25 as a normal protective measure.

The compressor has stalled, or there is a fault in its current sampling circuit, leading to an operational issue. This impacts the unit's ability to compress refrigerant.

There's an error in the Pulse Width Modulation (PWM) selection circuit or the compressor's position detection circuit, affecting its precise operation and control.

There is a communication fault between the power module and the main PCB board within the outdoor unit, preventing proper control and operation.

The outdoor unit's LED1 flashes 4 times, indicating a communication problem between the IPM module and the outdoor PCB. This suggests a wiring issue or a fault in one of these components.

The outdoor unit's coil has activated a protection, possibly due to extreme temperatures (e.g., frosting in winter or overheating in summer) or other operational issues.

The board responsible for driving the compressor's operation has failed, preventing the compressor from starting or running correctly.

The temperature of the compressor's discharge line is too high, activating a safety protection to prevent overheating and damage to the compressor.

The indoor and outdoor units, or components within them, are not correctly matched or configured, causing an incompatibility error.

The sensor that measures the outside air temperature is malfunctioning, which can impact the unit's ability to adjust its operation based on external conditions.

The sensor measuring the temperature of the refrigerant suction line is not working correctly, which is vital for monitoring the refrigerant cycle.

The DC fan motor in the outdoor unit is not functioning correctly, which can hinder heat exchange and system performance.

The power module has undergone an unexpected reset, indicating an internal issue within its operation or power supply.

The system's function for detecting refrigerant leaks is malfunctioning, meaning it cannot reliably report if there is a leak in the system.

During the timer setting process, 'ON' or 'OFF' will flash on the display to indicate you are selecting either 'TIMER ON' or 'TIMER OFF' mode.

When setting a 'TIMER OFF' function, the display shows 'TIMER OFF' for 10 seconds before going blank, indicating the timer to turn the unit off is set.

When setting a 'TIMER ON' function, the display shows 'TIMER ON' for 10 seconds before going blank, indicating the timer to turn the unit on is set.

The unit will make two 'Pi' sounds to indicate that the 'SELF-CLEAN' function has finished and the unit is returning to its original operating state.

This indicates Demand Response Mode 2 (DRM2) is active. The air conditioner's compressor is turned off, and cool/hot air will no longer be generated, but the fan continues to operate. This mode automatically resets within 2 hours.

This indicates Demand Response Mode 1 (DRM1) is active, capping the air conditioner's energy consumption at 50% while continuing to cool or heat at a reduced capacity.

This indicates Demand Response Mode 3 (DRM3) is active, capping the air conditioner's energy consumption at 75% while continuing to cool or heat at a slightly reduced capacity.