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2. If the power switch is turned on, you can't hear the sound of the relay in the machine. The digital display meter and various indicators are not lit. It means that the input power supply, ie the AC 220V voltage, has not entered the machine and should be checked by the maintenance personnel.
Switching power supply common fault repair First, the fault phenomenon: the power-on power indicator does not light.
Check the contents: Whether the power supply is connected, whether the knife is closed, if there is a phase loss in the three-phase power supply.
Remedy: Connect the power supply, close the knife 2. Fault phenomenon: The power indicator is normal, the fan is normal, and the work indicator is not lit.
Check content: Whether the startup switch is in the startup position: If the startup switch is in the startup position, the whole machine does not work, then toggle the startup switch to the starting position. 3. Fault phenomenon: the working indicator is normal, the current voltage is not adjusted. Check the content: Check whether the voltage limiting current limit and the steady current limit voltage knob are adjusted to the minimum position. Exclusion method: Put the voltage limiting current limit and steady current limit voltage knob to the appropriate position according to the plating process requirements. 4. Fault phenomenon: During work, Suddenly no current output, work indicator normal check content: Check whether the connection from the power output to the plating tank is disconnected. Replace or reconnect the cable. 5. Fault phenomenon: During operation, there is no current output, protection. The indicator light flashes to check the content: 1. Check if the working environment temperature is too high, and whether the fan works normally. Exclusion method: Exclude the fan fault and improve the ventilation condition. Check the content: 2. Determine whether the instantaneous overcurrent protection is removed: press the boot program to restart the machine. Can the power supply work normally? Check the content: 3. Is the input voltage normal? , Undervoltage, three-phase input with or without phase elimination method: After eliminating the power supply line fault, press the boot procedure to restart the boot. Check the content: 4. Check the power rectifier tube for short circuit elimination method: Replace the rectifier tube to check the content: 5. Check the power device for damage, and whether the input rectifier module is damaged or not. Replace the power device of the same model and check whether the drive circuit is damaged. If it is replaced, replace the input plating rectifier module.
Sixth, the fault phenomenon: according to the normal operating procedures, the protection indicator light has been flashing to check the content: 1, check whether the working environment temperature is too high, the fan is working properly. Exclusion method: eliminate the fan failure, improve the ventilation conditions. Check the content: 2. Determine whether Instantaneous overcurrent protection elimination method: press the boot program to restart, the power supply can work normally. Check the content: 3. Whether the input voltage is normal, whether there is overvoltage, undervoltage, and whether there is no phase loss when three-phase input: Eliminate the distribution line After the power failure, restart the power according to the startup procedure. Check the following: 4. Check whether the power rectifier is short-circuited. Replace the rectifier. Check the contents: 5. Check the power device for damage. If the input rectifier module is damaged or not, replace the same method. Model the power device, and check the drive circuit for damage, replace it, replace the input plating rectifier module.
[ Huaqiang Security Network News ] Nowadays, power problems are emerging one after another, which brings a lot of troubles to users. The following Xiaobian share a little about the solution to the power failure problem, I hope it will be useful to everyone. 1. “Voltage regulation†and “current regulation†are all adjusted to the right, not at zero position. “Overvoltage regulation†has also been adjusted to the right. The power supply still has no voltage or current output, and “constant voltage†and “constant†The “flow†lights are all lit, and this state should be reported to the maintenance personnel for inspection.