Many friends want to master a little knowledge of home appliance maintenance, so that if the home appliance breaks down, they can repair it themselves, saving money and time. Today, Bian Xiao will tell you some knowledge points of home appliance maintenance training, so that you can repair the air conditioner at home, easily determine the faults of the air conditioner, and make it more convenient for you to repair it.

1 Use the self-diagnosis function for fault diagnosis.

Nowadays, many air conditioners have intelligent diagnosis function, which is also the new standard of intelligent air conditioner power supply. Microprocessor detects temperature, current, pressure and other parameters through sensor timing. Compare the parameters solidified in the microprocessor. Through judgment and logical processing, when the detected parameters exceed the standard parameter range, the air conditioner is displayed by flashing indicator light or fault code.

2 use the forced start function to judge the fault.

Forced start function is an important function of inverter air conditioner maintenance. In the inverter air conditioner, the forced function can be used to display the fault code during the self-inspection. We can carry out efficient and fast maintenance according to the fault code of the air conditioner when testing at home. The indoor unit and outdoor unit of inverter air conditioner have independent terminals for forced operation or trial operation. Using these terminals, the indoor unit and the outdoor unit can be operated separately, so that the circuit board can be quickly judged. More targeted repairs can be made.

3 Determine the communication failure.

In variable frequency air conditioning, when abnormal communication fault code appears on the air conditioning display screen, it means that the communication circuit is out of order. The detection method of reliability lies in the detection circuit; Communication failure, use multimeter to test the 250v AC voltage. If the voltage of neutral line and signal line changes back and forth and the indoor communication light flashes, it indicates that communication is normal, otherwise the communication line fails.

Of course, if you want to repair the air conditioner at home, you need these knowledge points. Only by starting from the foundation can we repair it better. But mastering these knowledge points can help you better judge the cause of air conditioning failure and prevent being deceived.