The operation of a good air conditioner makes life much easier in the summer heat. Cool fresh air makes you feel more comfortable, energizing and eager to take action. And during the off-season, when the central heating is not yet working at full capacity, the air conditioner can be safely used as a source of additional heating.
LG's appliances have an excellent reputation, and the air conditioning systems of this brand are no exception. However, in the operation of any device, difficulties may arise associated not only with the quality of the device itself, but also with the conditions of its operation. Typical error codes for LG air conditioners signal in time about problems and probable malfunctions that will soon have to be eliminated if the technique continues to work in the same mode.
However, knowing the decoding of the error that occurred, the owners will be able to independently diagnose potential breakdowns and correct the operating conditions of the device. In this article we will tell you what the error codes for air conditioners from the popular South Korean trademark, what errors can be eliminated without calling the master and when the services of a specialist are not worth it neglect.
The content of the article:
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LG air conditioner self-diagnosis
- LED blinking decoding
- What do the errors of LG split systems say?
- Mistakes of brand inverter air conditioners
- How to troubleshoot LG air conditioner?
- Conclusions and useful video on the topic
LG air conditioner self-diagnosis
Difficult working conditions, heavy load or incorrect calculations when designing the entire air conditioning system can adversely affect even an expensive premium air conditioner. However, the self-diagnosis function possessed by LG climate technology makes it possible to detect and neutralize in time the reasons due to which the device may fail.
The air conditioner independently launches certain diagnostic processes at each stage of operation, checking the performance of a particular unit.
If certain problems are detected during monitoring, the operation of the device is blocked by the controlling microcontroller, and the device itself issues a specific error signal. It can be represented as alphanumeric message on the display or displayed by flashing of certain diodes on the block. The number of individual diode flashes is interpreted as a separate error code.
The device must be repaired by a specialist. However, self-decryption of the error code will allow the owner to estimate in advance the complexity of the upcoming work in restoring the operation of the air conditioner.
Displaying errors of air conditioners brand Lji has a certain feature. If the internal self-diagnosis system finds several faults, then the unit first gives an error signal with the lowest sequence number. Each subsequent code will be displayed in ascending order.
For example, if an open circuit occurs in the system (error C2 or C4) and the fan of the outdoor unit does not rotate (error C9), then the air conditioner will first indicate a break, after which it will signal the stop of the rotation of the blades in the external block.
LED blinking decoding
As described above, the indoor unit of the split home complex is equipped with a special diode. When certain malfunctions occur in the air conditioning system, this lamp starts flashing. The flash can be fired from one to ten times, signaling a specific error. In this case, the interval between the sequence of flashing of the diode in the LG air conditioner is 3 seconds.
Error 1 is expressed in a single blinking of the lamp every 3 seconds and indicates a break or short circuit in the internal block of the split system, which causes breakdowns in the board. To eliminate the problem, they check the operation of the thermistors in the indoor unit and, if necessary, replace these components.
Error 2 (blinking of the diode twice) signals a similar problem with thermistors that are installed in the external unit.
The breakdown is neutralized in the same way: the temperature sensors of the incoming air or the temperature of the gas circuit tube are checked, but already during external block, and they are replaced.
An air temperature sensor in an air conditioner is far from the most expensive part. Therefore, you should not be afraid of replacing it, since repair work of such a plan is quite affordable.
Error 3 (3 blinks) is associated with the installation of the system and occurs when the operation of the air conditioner is aimed at both heating and cooling. It is necessary to check the correctness of the connection of the wires, the interconnect cable and the correctness of the connection of the air conditioner.
Error 4 (4 flashes) indicates the start of the compressor protection system, which is overloaded. To eliminate, check the operation of the outdoor unit thermostat, record the current load and gas pressure in the system. These activities will help to find out the reason due to which the compressor may fail.
Error 5 (5 flashes) occurs when the data exchange between the apartment and the outdoor unit is incorrect. With this code, cable lines are tested in which a break or short circuit can occur. After diagnostics, it may be necessary to replace the interconnects.
Error 6 (6 flashes) appears after a short-term increase in the consumption current in the outdoor unit. In such a situation, all actuators of the external unit and key power relays are checked.
Error 7 (7 flashes) also signals an excess current in the outdoor unit, however, in this case, the consumption threshold is out of range for a long time. For diagnostics, it is necessary to check the refrigerant pressure in the system and exclude malfunctions of all elements in the outdoor unit.
High refrigerant pressure in any brand of air conditioner can lead to leakage of coolant, which will inevitably lead to more serious repair work. In some cases, it is impossible to fix such a problem on site, so the master will have to dismantle the entire unit.
Error 8 (8 flashes) indicates a problem with the fan motor. In addition to directly checking this unit, it is necessary to inspect the elements of its control circuit and contact terminals.
Error 9 (9 flashes) requires checking the operation of the 4-way valve.
Error 10 associated with a short circuit or open circuit, which could cause a breakdown of the thermistor, which is responsible for monitoring the temperature of the built-in compressor housing. After diagnosis, the thermistor will most likely need to be replaced.
What do the errors of LG split systems say?
In addition to the flashing of the LEDs, the typical malfunction codes of the LG air conditioner may have alphanumeric display. This system is also present in the extremely popular series Art Coolrepresented by elegant wall-mounted air conditioners. The meaning of decoding codes using this technology has much in common with the interpretation of LED blinking.
Typical errors regarding short circuit or open circuit in individual sections have the following meanings:
- C1 (CH1) - short circuit in the internal air temperature sensor or open circuit in the same circuit.
- C2 (CH2) - short circuit or open circuit in the evaporator temperature sensor.
- C4 (CH4) - open or short circuit in the circuit at the condenser temperature sensor.
- C10 (CH10) - open or short circuit in the temperature control thermistor of the compressor housing.
Besides these errors, there are others as well.
Consider them in more detail below:
- C3 (CH3) - simultaneous heating and cooling of air.
- C5 (CH5) - problems in the connection between the outdoor and apartment blocks.
- C6 (CH6) - short-term increase in current in the relay of the outdoor unit or overcurrent in the circuit of the inverter module.
- C7 (CH7) - continuous increase in current consumption in the entire external unit or overcurrent in the compressor.
- C8 (CH8) - stopping the fan in the indoor unit.
- C9 (CH9) - breakage of the 4-way valve or malfunction of the fan of the outdoor unit.
Errors indicating problems with compressorshould not be ignored. It is advisable to carry out diagnostics, find the cause of the breakdown and eliminate it.
The compressor in an air conditioner is one of the most important and costly components. Therefore, it is extremely important to be attentive to the errors that are associated with it.
There are also letter errors. So, the error CA speaks of a high discharge temperature - over 130 degrees.
Code SS indicates errors in the internal volatile memory of the device.
Designation CD signals a problem in the inverter module.
Text characters Ro and Lo are not errors. The first code indicates that the system is operating in an energy-saving mode, the second indicates that the equipment testing phase has passed.
Mistakes of brand inverter air conditioners
Self-test results display inverter line of air conditioners brand maybe flashing of several diodes on the block. The error code is calculated by the number of flashes. For example, if one LED blinks 5 times and the other blinks 3 times, the fault has code 53.
One lamp can also blink, alternately changing colors. The error code is calculated according to a similar algorithm: flashes of the same color are counted, their number will become the first digit in the code, and the second, the number of flashes of which is interpreted as the second digit of the cipher.
High and low pressure sensors cut into the freon line of the household air conditioner. Visually, these sensors do not differ from each other, however, they have different technical parameters.
The probable causes of failures with such errors usually relate to problems with voltage, open or short circuit in individual nodes.
They lie in the following errors:
- 22 - the current in the compressor exceeds 14 A.
- 23 - DC voltage after the conversion module does not reach 140 V.
- 24 - opening of pressure sensors, too high or low pressure readings.
- 25 - high or low supply voltage.
- 27 - problems with the reactor, inductor.
- 28 - DC link voltage is 420 V.
- 40 - short circuit.
- 41 - short circuit or open circuit in the D-Pipe sensor.
- 44 - short circuit or open circuit of the incoming air temperature sensor.
- 45 - the condenser sensor is closed or interrupted.
- 46 - short circuit or breakage of the sensor on the suction tube.
- 51 - power overload.
- 54 - the need to change the phase (typical for systems with three-phase power supply).
- 60 - EEPROM errors (internal non-volatile memory).
Compressor overload is indicated by error 21. A error 26 - error detection position. Connection problems are reported errors 52 and 53.
If an error occurs in the connection between the outdoor and apartment blocks of the air conditioner, the exchange of data between the elements of the system is disrupted. Replacement of interconnect cables may be required to fix breakage
Also, errors are frequent regarding the increase / decrease in the temperature of individual nodes:
- 32 and 33 - high temperature in the discharge pipe.
- 47 – problems with the D-Pipe sensor.
- 48 - malfunctions with the D-Pipe sensor or air temperature sensor (short circuit or open circuit).
- 61 - high temperature in the condenser tube.
- 62 - high temperature in the radiator.
- 63 - low condenser temperature.
- 65 - short circuit or open circuit of the radiator temperature sensor.
You can also encounter problems such as blocking the electric motor in the outdoor fan - error 67 and loss of communication between the main control board and the fan control module - error 105.
How to troubleshoot LG air conditioner?
Awareness of the current shortcomings in the operation of the equipment makes it possible to independently eliminate them.
But, unfortunately, the owner of the air conditioner can fix not every mistake.
In fact, do-it-yourself repair of an LG air conditioner is possible only in isolated cases, when errors detected during self-diagnosis of the device suggest elementary malfunctions
If the LG air conditioner provides information about complex breakdowns, you should definitely invite a certified service technician. You must first restart the air conditioner: perhaps after restarting the error will disappear.
You will have to resort to the services of a master if the device signals such malfunctions:
- malfunctions in the compressor;
- errors in the operation of blocks of the electronic control system;
- refrigerant leaks;
- improper operation of the electric motor.
The user can independently engage in unlocking the blinds if foreign objects interfere with their normal operation. As well as cleaning equipment or the planned replacement of filters and solving problems with the power supply of the device.
Recent work related to installation voltage regulator, because quite often complications in the operation of an air conditioner arise precisely because of the unstable supply of current in the power grids.
It is worth remembering that it is highly undesirable to disassemble the device yourself. In addition to irreparable damage that the owner can inflict on the equipment due to a lack of knowledge and skills, you can lose free warranty service.
Conclusions and useful video on the topic
Overview of three top models of air conditioners Art Cool series presented in the video below:
In the following video, the wizard shows how an LG air conditioner is repaired with a freon leak:
And in this video, a specialist talks about the consequences of error C9 (CH9) - replacing a 4-way valve:
Self-diagnosis of the air conditioner allows you to find the problem in time and save expensive equipment. LG climate technology performs high-quality monitoring of internal systems and quickly informs the owner about current problems.
Most faults will require the services of a specialist. However, knowledge of the decoding of typical errors will help the user to prepare for the repair of the air conditioner and calculate the approximate cost of future work..
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