Air conditioner error codes: types, description

Both domestic and industrial air conditioning systems, for the most part, have a self-diagnosis function. This function can operate in automatic mode or in special mode if problems occur with the equipment. As a rule, information with error codes can be seen on the displays located on the internal units of split systems. Thanks to this data, the malfunctions that caused disruptions in the operation of the air conditioning system are accurately determined. To independently determine the causes of problems in devices from different manufacturers, you can use the lists of error codes for various air conditioners, provided below by brand name.

LG

In LG air conditioning systems, the microprocessor, when any problem is detected, blocks the unit from starting, after which it sends signals by flashing the LED, which indicate the error code.

If the system has detected several problems, then the failure that has the lowest serial number is induced first. After that, faults are indicated in ascending order. The table below lists the error codes for LG air conditioners and explains what each of them means.

You should know: the occurrence of similar errors can be caused by unsatisfactory parameters of the electrical network, or an accidental failure that occurred in the electronics of the unit. Therefore, do not rush to contact service immediately, but simply turn off the power to the device and check the electrical voltage. You also need to make sure that the device operating mode is selected correctly. After these checks, you can turn on the device. Most often, this method helps in solving this problem, and it no longer appears.

The set of fault symbols detected by the microprocessor depends on the unit model. For LG air conditioners there may be another indication - in the form of numbers and letters.

Evaporator unit malfunctions:

Indications of defects in the capacitor unit:

Designations in LG Art Cool units:

Aux

In case of unstable operation of the equipment, Aux air conditioner error codes help users restore the operation of the equipment. Having seen the alphanumeric designation, it becomes clear to the user where to look for a malfunction.

Air conditioner Aux error codes are presented in the form of letters and numbers. Their content differs from the equipment series. For most units, E1 indicates a problem with the unit's indoor thermistor. E5 indicates a block error outside. Once you see the coded value, you should study the instructions. This will allow you to assess the possibility of performing repair work on your own.

Daikin

Daikins are quite complex equipment (from a technical point of view) and, in addition to the refrigeration unit, have electronic control boards, many different sensors and valves, a power inverter and other components. If any component of the device fails, it is difficult to find the cause of the failure without a special function that allows you to diagnose the equipment. This procedure is carried out using the remote control, and error codes for Daikin air conditioners when the device malfunctions can be seen on its display.

Problems with the evaporator unit of Daikin equipment:

Outdoor unit defects:

System faults:

Other problems:

Classification of air conditioner error codes

Air conditioner fault codes are classified according to a generally accepted symbol combination system and consist of 2-3 or more characters. These can only be numbers or letters of the Latin alphabet, as well as a combination of letters and 1-2 numbers.

The location where the failure occurred is determined by the letter symbols, and by the number or number of blinks of the diode, you can determine what kind of failure occurred.

Classification of error codes:

1. Simple symbolic codes.
2. 2-digit detail designations.
3. Simplified 3-digit signal.

The owner of the device does not need to memorize all the symbols and error codes of air conditioners, especially since they are different for each brand of equipment. It is enough to pay attention to the problem in time and disconnect the device from the network until the reasons for the malfunction are determined.

The operating instructions for air conditioners publish information about codes, which will allow the owner to determine the type and complexity of the breakdown. If the problem cannot be solved on your own, you will have to call a technician from the service center.

Symbolic error codes for air conditioners

Character codes are represented as several characters, for example “*”. The error in this case can be understood not by the symbol itself, but by their number. Typically, symbolic error codes are displayed on the control panel.

Two-Digit Air Conditioner Error Codes

Two-digit error codes use Latin letters and numbers. The first part of the code, displayed in letters, is responsible for the structural components of the split system.

Explanation of symbols (briefly):

• “A” and “B” – malfunctions of the indoor unit;
• “E”, “H”, “F”, “J”, “L”, “P” - problems arose in the outdoor unit;
• “U” and “M” - these codes indicate system problems.

The second error code is represented by numbers in the sequence from 0 to 9. To determine the exact cause of the problem, it is recommended to study the user manual included with the air conditioner.

Three-digit air conditioner error codes

3-digit error codes use letters and numbers, often in a combination of one letter character and two numbers. The attached instructions contain a detailed explanation.

Cleaning your home air conditioner yourself

Panasonic

Error codes for Panasonic air conditioners are usually displayed on the display located on the wall-mounted (room) unit of the unit. They can be recognized by pressing the “CHECK” button on the remote control and holding it for at least 5 seconds.

Since only a hole is visible on the remote control instead of a button, you can use a paper clip, if it is bent, or a small nail to press the recessed button.

After the remote control enters the error checking mode for Panasonic air conditioners, point it towards the indoor unit of the device and by pressing the buttons designed to control the timer (up and down arrows), begin to cycle through the codes, starting from “H00” and further, according to in order. If the fault code in the memory of the wall unit and on the remote control matches, you will hear a sound signal. To exit the check mode, press the “CHECK” button again.

Explanation of values ​​for Panasonic units:

Air conditioner error codes on the remote control

Fujitsu air conditioner: fault codes, system error monitoring or System Controller Error.

When "EE" error indication: If EE is displayed on the remote control, press "Energy Saving" and "Mode Change Button" at the same time. Press the buttons for more than 3 seconds.

Error codes will be shown on the display.

1. Stop the air conditioner.

2. Press the "Control Wizard" button and the "Fujitsu Repair" - fan control button simultaneously for 2 seconds or more to begin a test run.

3. Press the "Start/Stop" button to stop the test run.

Toshiba

The remote control for Toshiba Ras cooling systems also has a “CHECK” button, which enables self-diagnosis of the unit.

Codes for problems in Toshiba household air conditioning systems (Toshiba RAS-07S3KHS-EE/RAS-07S3AHS-EE, Toshiba RAS-10EKV-EE / RAS-10EAV-EE):

These values ​​also apply to devices RAS-10SKHP-ES, RAS-13SKHP-ES, RAS-13S2AH-ES, RAS-07S2AH-ES, RAS-10S2AH-ES, RAS-07SKHP-ES and others.

Fault codes for Toshiba industrial air conditioners:

General Climate air conditioner error codes

Digital codes on the remote control

Determining a malfunction by flashing indicators

Error codes for S-HR series split systems

Models: S07HR S09HR S12HR S18HR S24HR

Models: S30HR S36HR

Indoor unit errors

External unit errors

Fault codes for three-phase air conditioners

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Gree

If, when the air conditioner is turned on, the self-diagnosis system detects a malfunction in any module of the device, then its startup is instantly blocked . In this case, all error codes of Gree air conditioners can be observed either on the screen of the remote control or on the display of the internal unit of the unit.

List of faults of Gree air conditioning units:

Diagnosis of air conditioner malfunction

Brought to the point of automation, a high-quality modern air conditioner saves a person from unnecessary checks or scheduled cleanings. Air conditioning a device with built-in powerful processors allows you to extend its service life with minimal costs for expensive repairs. Air conditioner error codes are created for the convenience of users and in case of the slightest problem that arises in any part of the air cooler. Device repair will be much faster if the cause of the problem is determined accurately. How not to get confused in complex symbols when air conditioners of any capacity malfunction?

The first stage of device testing is comprehensive diagnostics. Before starting repairs, the technician or, if desired and possible, the owner of the air conditioner, inspects the external and internal parts of the cooler.

A correct “diagnosis” of the device is half of the successful repair of an expensive unit. A complex system such as an air conditioner cannot work forever and over time the most sensitive parts of the mechanism fail. A malfunction is preceded by a reduced amount of refrigerant or a breakdown of the components that supply the entire device with energy. The type of fault is not so important if it is determined quickly and correctly - subsequent repair work will take place without difficulties or hitches.

A home or office building needs air conditioners to work, so the time spent diagnosing a breakdown is of particular importance. In summer, a cooling device is simply irreplaceable in closed rooms or offices. A significant saving of precious time will be the prompt work of the technician who comes to the call. A specialist with many years of experience working with error codes will determine the cause of malfunctions in a matter of minutes.

Air conditioner diagnostics - the first stage in troubleshooting

General Climate

Alphanumeric symbols of problems that are displayed on the remote control:

Errors that are displayed on the display of the wall unit (indoor) General Climate:

Some General Climate air conditioner error codes given above allow the user to independently find the problem and fix it. In other cases, for example, if the def/fan (pre/def) indicator is blinking, specialist assistance will be required.

Error codes on displays

Some errors can be corrected yourself. To eliminate others, you will have to contact a specialist:

• operation+timer+def/fan – too much voltage is supplied to the compressor more than once every 15 minutes. The air conditioner should be unplugged from the electrical outlet;
• water alarm LED (blinking) – there is too much water in the condensate container for no longer than 3 minutes. The sump pump must be started manually;
• water alarm LED (constantly lit) – the container is overfilled for more than 3 minutes. The device is in emergency mode. In order to clear this error code, you should disconnect it from the electricity supply;
• def/fan (pre/def) – no contact with the temperature sensor on the condenser. The device will start working as soon as the temperature sensor turns on;
• All the lights are blinking - a malfunction of the outdoor unit (overheating or hypothermia, power failure);
• Timer – short circuit or no contact with the internal temperature sensor;
• Operation – there is no contact with the temperature sensor on the evaporator or there is a short circuit in it;
• operation+timer – contact failure with EEPROM. You cannot fix this error yourself, since you need to install a new control board.

Samsung

To start self-diagnosis of Samsung equipment, you need to start the condenser in test mode. To do this, hold down the split system start button for 5 seconds. Error codes for Samsung air conditioners, when detected, are displayed on the display of the unit located indoors.

Malfunctions of Samsung split systems:

Troubleshooting

If you correctly decipher the air conditioner error codes, some malfunctions can be eliminated yourself, without the help of specialists. Let's look at the most common causes of malfunctions that the owner of climate control equipment can handle.

Air conditioner malfunctions and solutions:

1. Filters are dirty. Requires cleaning by rinsing under running water.
2. Overheating of the system due to contamination of the radiator. This mechanism must also be cleaned from dust and other contaminants.
3. Condensation is leaking from the indoor unit. The owner needs to disconnect and clean the drain tube, and then dry it and return it to its original position.
4. Poor cooling of the air conditioner, caused by a clogged capillary tube. Cleaning is carried out using the vacuum method.
5. The indoor fan is dirty. Cleaning the blades is done using a soap solution, a soft cloth and a brush.

It is not recommended to fix more serious problems that cause climate control equipment to malfunction on your own without the appropriate experience and skills. It is better to entrust the repair and replacement of failed parts to qualified specialists from the service center.

Mitsubishi

To troubleshoot Mitsubishi equipment, it takes 4 seconds. hold down 2 buttons on the remote control (simultaneously): “CHECK” and “SET”. If problems are detected, error codes for Mitsubishi Electric air conditioners are displayed on the display of the indoor unit or remote control.

In addition to the above-mentioned Mitsubishi Electric air conditioner errors, there are universal error codes related to different models of Mitsubishi Electric units:

• error E6 or EE - problems were detected in the connection between the unit located outside and the indoor unit. There is no signal from the sensor, or a short circuit is detected;
• code E5 - malfunctions have been detected during the operation of the equipment; it is also necessary to check the electrical voltage in the network.

Deciphering errors on the Samsung AC030JXADCH model

Air conditioners in this series belong to the classic models of air conditioning equipment. They use R-410A refrigerant. This equipment consists of two blocks. There is no air duct for this series.

Possible mistakes:

• E508 – there were problems with the “Smart” installation;
• E202 – communication failure between units when the signal from the indoor unit is lost;
• E201 – no connection between blocks during tracking;
• E203 – temporary problem when processing data from the compressor to the indoor unit;
• E221 – malfunction of the external temperature sensor;
• E108 – repeated communication address;
• E251 – there is an error in the data received from the temperature sensor, which is pumped by the compressor, check the starting capacitor;

temperature sensor

• E231 – COND floor sensor is faulty;
• E320 – OLP sensor malfunction;
• E404 – system overload protection has tripped;
• E590 – EEPROM checksum is incorrect;
• E464 – system stop due to DC peak;
• E473 – Comp blocking;
• E465 – compressor overload possible;
• E468 – current sensor malfunction;
• E461 – failure of the inverter compressor;
• E469 – DC communication voltage sensor is not working correctly;
• E475 – inverter fan 2 needs to be replaced;
• E660 – failed to load inverter code;
• E500 – receiving incorrect thermal data from the first inverter;
• E484 – PF C overload;
• E403 – transition of the lower compressor to frost protection mode, check for presence;
• E440 – the floor temperature has exceeded the default threshold and reached the TheatJiigh parameter;
• E441 – the floor temperature limitation has reached the Tcooljow parameter;
• E556 – discrepancies between the capacity of the indoor and outdoor units;
• E557 – adjustment of the DPM remote controller option is required;
• E198 – thermal breaker is not working correctly;
• E121 – incorrect room temperature data;
• E122 – EVA indoor unit sensor is faulty;
• E123 – the EVA output sensor of the indoor unit generates an error;
• E154 – incorrect operation of room ventilation;
• El53 – repeated detection of float switch failure.

TCL

Error codes in TCL climate systems (air conditioners) can be deciphered using the table below (the number of LED blinks in 8 seconds indicates an error code).