Users who have Kelon air conditioning at home generally know what "FC" stands for. Because it's usually written in the instructions. When the "FC" on the display screen of the indoor unit of the air conditioner flashes, it means that the machine is executing the "filter screen cleaning prompt function", prompting that the filter screen needs to be cleaned. Some products will beep at the same time when "FC" is displayed. The above phenomenon should be explained to users. This is not a machine problem, and FC is not a machine fault code. It is the normal function of the air conditioner, indicating that the filter screen needs cleaning.
"FC" is to remind your air conditioner to clean the filter, which is a humanized reminder function. This is a protection code of Kelon air conditioner; After the fan in the air conditioner runs for 200 hours, it will enter the state of filter cleaning prompt, and FC prompt will appear.
It is very important to keep the filter clean, and the function of not prompting will let users continue to use it in a harmful state. After cleaning the filter, just press the maintenance switch (emergency). Please refer to the instruction manual if you have any questions.
Second, how to cancel Kelon air conditioner "FC"?
The cancellation method is as follows:
1. Press the key on the remote controller (press the high-efficiency key continuously for 5 seconds, and the remote controller will send out a cleaning reset code) to clean and reset the filter screen; (This scheme is a general scheme)
2. The filter screen can be cleaned and reset by operating the "panic button" on the indoor controller; In the state of cleaning prompt, press "panic button" once to reset and cancel the cleaning prompt, and panic button will restore its original function. (If the controller is designed with a dedicated clean reset key, it is best to use the clean reset key. )
3. After exiting the cleaning prompt state, the air conditioner returns to the normal display and operation state, and the accumulated timing of the fan is reset.
It shows FC, which is Kelon's patented technology-the filter screen is full of dust, prompting to clean the filter screen, and the word FC will be gone after cleaning! If it is not cleaned up in time, the word FC will be displayed every time it is turned on! Go clean up!
Three, Kelon air conditioning fault judgment method:
1, look:
Carefully observe the working conditions of each part of the air conditioner, focusing on the refrigeration system, electrical system and air system, and judge whether it works normally.
(1) Refrigeration system: Observe whether there are cracks, damages, frosting and dew condensation in each pipeline of the refrigeration system; Whether there is any collision or friction between the refrigeration pipeline, pipeline and shell, especially whether there is any leakage at the welding parts and joints of the refrigerant pipeline, and whether there is oil pollution (there is a certain amount of refrigeration oil in the refrigeration system), you can also wipe the welding parts and joints of the pipeline with clean soft cloth and soft paper to observe whether there is oil pollution to judge whether there is leakage.
(2) Electrical system: Observe whether the fuse of the electrical system is blown, whether the insulation of the electrical leads is intact, whether the circuit board is damaged, whether the connectors are loose, etc. In particular, whether the electrical connection is in good contact, the wiring screws and connectors are easy to loosen, leading to poor contact. (3) Ventilation system: Observe whether there is too much dust on the air filter, heat exchanger coil and fins; Whether the air inlet and air outlet are unblocked; Whether the fan and blades are operating normally; Whether the wind is normal, etc.
2. Listen:
Turn on the power supply, and listen carefully to whether the operating sound of the air-conditioning compressor is normal, whether there is abnormal sound, whether the fan is noisy, whether the noise is too large, etc. Under normal circumstances, the air conditioner has slight vibration and low noise, generally below 50DB.
If the vibration and noise are excessive, the possible reasons are:
(1) is improperly installed. If the bracket size is inconsistent with the unit, it is not firmly fixed or there is no damping rubber or foam plastic pad, which will aggravate the vibration and noise of the air conditioner during operation. Especially at the beginning and stop.
(2) Abnormal vibration of compressor. Poor installation of the base, uneven support feet, install shock-proof rubber or shock-proof spring.
Poor or poor shockproof effect, etc. If there is a fault inside the compressor, such as valve plate rupture, liquid hammer, etc. , but also make abnormal sounds.
(3) Fan collision. Improper installation or deformation of fan blades will produce collision sound. The fan may collide with the wall shell and chassis, the axis of the fan will move, and the blades will make a collision sound when they are out of balance; If there is a foreign body in the fan, the blades will also collide with it.
3. Touch:
Touching the relevant parts of the air conditioner by hand and feeling its cold, heat and vibration are helpful to judge the nature and location of the fault. In general, the temperature of the condenser gradually decreases from top to bottom, and the temperature in the lower part is slightly higher than the ambient temperature. If the whole condenser is not hot or the upper part is slightly warm, or although it is hot, the temperatures of two adjacent tubes are obviously different, it is abnormal. Evaporator Under normal circumstances, if you immerse your fingers in the water on the surface of the evaporator, you will feel cold and sticky. Dryer, outlet
In general, the capillary tube should have a warm feeling (slightly higher than the ambient temperature, and basically the same as the temperature of the condenser end pipe). If the temperature is lower than the ambient temperature, the condensation on the capillary surface and the temperature difference of each part are abnormal. Under normal circumstances, the temperature of the suction pipe 200MM away from the compressor should be close to the ambient temperature.
4. Test:
In order to accurately judge the nature and location of faults, it is often necessary to check and measure the performance parameters and status of air conditioners with instruments. If a leak detector is used to check whether there is refrigerant leakage; Use a multimeter to measure whether the power supply voltage, grounding current of each terminal and working current meet the requirements, and the computer-controlled air conditioner should also measure whether the potential of each control point is normal.
5. Analysis:
Most of the results obtained by the above inspection methods can only reflect a local state. All parts of air conditioning are interrelated and influence each other. A fault phenomenon may have many reasons, and a reason may also produce many faults. Therefore, the local factors should be comprehensively compared and analyzed, so as to comprehensively and accurately determine the nature and location of the fault.