The air conditioning control panel is also a kind of circuit board, and its application range is not as wide as that of the circuit board, but it is smarter and more automated than the ordinary circuit board. Simply put, a circuit board that can play a controlling role can be called a control board. From the automated production equipment of the manufacturer to the toy remote control car for children, the control panel is used inside. So how to overhaul the air conditioning control panel? The decoration home network Xiaobian will take you to see. In the overhaul of the air conditioner, the control line part is a trouble-prone point, which is also a difficult point of maintenance. In particular, the cabinet air conditioners produced in recent years have high technical content. It is very difficult to repair the air conditioning control panel on the outside of the air conditioner. If the indoor and outdoor main board and the switch board are removed from the air conditioner, and the data lines of the communication ports of the boards are connected, it is convenient to use the analog method to make the air conditioner control boards be connected to the air conditioner as normal operation. Repaired safely. The following is an example of the LFl2WB cabinet of the United States to introduce the offline maintenance of the control panel. Prepare a set of power transformers, data communication lines, analog switches, analog ports and other accessories with corresponding connectors. Before removing the plugs of each control board, mark them with a grease pen to avoid errors during installation. While disassembling the control panel, measure the resistance value of each temperature sensor with a multimeter and write it down. After the disassembly, connect the control panel on the workbench according to the drawing. Because of the bare parts operation, it is best to add an isolation transformer when providing 220V turtle source to the control panel to ensure personal safety. The indoor unit air conditioner control panel has two analog ports of JPLL and JPl2, which are respectively connected to the tuyere temperature sensor 'YEMPl and the inlet air temperature sensor TEMP2. Both TEMPI and TEMP2 are thermistors with negative temperature coefficient. The normal temperature resistance values ​​are 4kfI and 4.5k11 respectively. Two 10kll adjustable resistors can be used to adjust to 4kfl and 4.5k11 respectively to connect to JPll and JPl2 ports. The outdoor unit control board needs to add analog data to JP1, JP17, JP18 and JP21, as well as the compressor overcurrent detection transformer T5. JPl6, JP17, JP18 are power supply phase loss and pipeline overvoltage and undervoltage protection input terminals. The connected line overpressure and the line undervoltage protection switch are closed (can also be replaced by an ordinary switch). Therefore, the A, B, and C phase power supplies are directly added to the JP16, JP17, and JP18 ports. JP21 is connected to the outdoor unit temperature sensor, the normal temperature resistance is 4.6kΩ, and a lOkΩ adjustable resistance can be adjusted to 4.6kΩ to the JP21 port. A 100W bulb is required to add analog to the T5 transformer. The phase line is wound 8 times in a clockwise direction on T5. The secondary voltage measured during operation is approximately 1.8V (close to the mutual inductance output voltage measured at 1.5V during normal operation on the air conditioner). After the analog quantity is added according to the above method, if the control boards are fault-free, they can operate normally. You can hear the pickup sound of the relay by operating the switch button on the switch board. Various data measurements can be easily performed on the workbench at this time. If it is not working properly or there is a corresponding fault code display, you can repair it according to many articles previously introduced in the e-newsletter. This method can also be used for offline maintenance of various control panels such as washing machines and refrigerators. The key is to accurately find out the port that the control board needs to add analog and the specific parameters of the analog quantity. The above is the introduction of the air conditioning control panel brought to you by the decoration home network Xiaobian. If you need to know more information, please continue to pay attention to our home encyclopedia! More related wonderful reading: What is the air conditioning control system? How does the air conditioning control system work? Air conditioning control background, principle of air conditioning control What are the functions of the air conditioner controller? Air conditioning controller usage Kaiping Yufa Sanitary Ware Co.,ltd , https://www.dlsenfaucets.com
