Switching power supply common fault repair - Database & Sql Blog Articles

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First, the fault phenomenon: The power-on power indicator does not light.
Check the contents: Whether the power supply is connected, 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 off.
Check the content: If the start switch is in the starting position, the method is excluded: If the start switch is in the start position, the whole machine does not work, then the start switch is once again turned to the start position. 3. Fault phenomenon: The work indicator is normal, the current voltage is not adjusted. Check the contents: Check whether the voltage limiting current limit and 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 the fan is working normally. Exclusion method: Eliminate the fan failure 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. Whether the power supply can work normally Check the content: 3. Is the input voltage normal, with or without overvoltage, owed Pressure, three-phase input with or without phase elimination method: After eliminating the power supply line fault, press the boot program to restart the boot. Check the content: 4. Check the power rectifier tube for short circuit elimination method: Replace the rectifier tube Check content: 5. Check the power Whether the device is damaged or not, the input rectifier module is damaged or not. Replace the power device of the same type and check whether the drive circuit is damaged. If it is replaced, replace the input plating rectifier module.
VI. Fault phenomenon: According to the normal operation procedure, the protection indicator light flashes to check the content: 1. Check if the working environment temperature is too high, and whether the fan works normally. Exclude the fan fault and improve the ventilation condition. Instantaneous overcurrent protection 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. 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.

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