Tips for repair air conditioners, a list of maintenance methods for household air conditioners

 Tips for repair air conditioners, a list of maintenance methods for household air conditioners

Various faults will occur after the air conditioner is used for a long time. If we know some maintenance knowledge, maybe we can solve it by ourselves. What are the skills for air conditioner maintenance? Repair method of frequency conversion air conditioner 1. Fault identification. Set the indoor unit controller switch to the "trial run" position. If the air conditioner works normally, the control system is basically normal. It is necessary to focus on checking each sensor for problems. 2. The air conditioner cannot work. Most of them are system failures. If the air conditioner has problems such as constant speed or protection off, please check the sensor first. The multimeter RX100 can be used to measure resistance changes. Although the resistance value of some sensors will change with the change of temperature, poor controllability will also lead to abnormal operation of the inverter. Therefore, repair or replace the sensor as needed. 3. Shut down suddenly during operation. During the operation of the air conditioner, it sometimes turns off automatically. After running for a few minutes, the indoor fan will also turn off automatically. However, the outdoor unit does not work. This problem is due to poor performance or even damage caused by long-term temperature rise of the inverter module, which should be replaced. 4. The cooling heat is reduced. Check the filter screen for too much dirt and clean the filter screen. 5. The air conditioner is too noisy. Adjust and tighten the foundation bolts of the compressor or the fastening bolts of the electric fan; In addition, the lack of fan bearing lubricating oil is easy to cause noise, so oil should be injected regularly; If the power supply voltage is too low, the compressor will also run unbalanced and increase noise. At this time, check whether the power system, power socket and plug are in good condition. 6. Maintenance precautions. (1) Pay attention to whether the voltage is normal. If the power socket detects abnormal voltage, check whether the main power switch is in poor contact. (2) Avoid personal injury caused by discharge of filter capacitor. The filter capacitance of variable frequency air conditioner shall be less than 4700 μ F。 Fully discharge after 10 minutes of disconnection to ensure that the human body will not be injured by electric shock. (3) There are a lot of dust and dirt in the condenser and evaporator, which will affect the cooling and heating effects. Please ask maintenance personnel to clean. If the air conditioner at home is broken and needs to be repaired, most people will immediately call the after-sales service technician to repair it. In fact, this is the right approach. Unless we have a good understanding of air conditioning, we will find someone to solve this problem.