On April 30, boiler 4# on the first floor of the south section of double reduction actuator can not be remote, in case of emergency, the team immediately organized Wei Yulong and boiler area other instrument maintenance personnel went to deal with. Wei Yulong rushed to the scene, first discovered actuator newspaper red light, read the fault information, lack of power, and measurement control room over the power supply voltage, voltage display normal 380V, determine the initial terminal board, power board or the frequency conversion board failure. Due to the replacement of the entire actuator will lead to the loss of the original data, you must re adjust the valve stroke, and the production process does not allow a large switch valve. Considering the possibility of terminal plate is not bad, in order to ensure the process safety and stability, after repeated demonstration, decided to replace the power board and inverter board. In boiler workshop stable process, electrical instrument maintenance workshop personnel the actuator stop off power, by order of the board in turn removed, replaced two intact board power and frequency conversion board. After replacement, the actuator after a slight adjustment, showing the return to normal, immediately put into use, the production process is not affected.