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

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First, the fault phenomenon: The power-on indicator light does not turn on. Check the contents: Confirm that the power supply is connected, the circuit breaker is closed, and check for any missing phase in the three-phase power supply. Remedy: Reconnect the power supply and close the circuit breaker. Second, the fault phenomenon: The power indicator works normally, the fan operates correctly, but the working indicator is off. Check the content: Ensure the start switch is in the correct position. If the machine doesn’t start when the switch is in the start position, try switching it back and forth again. Third, the fault phenomenon: The working indicator is normal, but the current and voltage are not adjustable. Check the contents: Verify whether the voltage limit, current limit, and steady voltage knob are set to the minimum position. Exclusion method: Adjust the knobs to the appropriate positions based on the plating process requirements. Fourth, the fault phenomenon: During operation, the current output suddenly stops, but the working indicator remains on. Check the content: Inspect whether the connection from the power output to the plating tank is disconnected. Remedy: Replace or reconnect the cable. Fifth, the fault phenomenon: During operation, there is no current output, and the protection indicator flashes. Check the content: 1. Check if the working environment temperature is too high and ensure the fan is functioning properly. Remedy: Fix any fan issues and improve ventilation. Check the content: 2. Determine if the instantaneous overcurrent protection has been triggered. Press the boot program to restart the machine. Check if the power supply can operate normally. Check the content: 3. Verify the input voltage is stable—no overvoltage, undervoltage, or phase loss. Remedy: After resolving the power line issue, restart the system according to the startup procedure. Check the content: 4. Inspect the power rectifier diodes for short circuits. Remedy: Replace the faulty rectifier diode. Check the content: 5. Examine the power device for damage, including the input rectifier module. Remedy: Replace the power device with a similar model and check the drive circuit. If necessary, replace the input plating rectifier module. Sixth, the fault phenomenon: Even after following the normal operation procedure, the protection indicator light flashes. Check the content: 1. Confirm the working environment temperature is within acceptable limits and the fan is operating correctly. Remedy: Fix any fan problems and improve air circulation. Check the content: 2. Check if the instantaneous overcurrent protection has been activated. Press the boot program to restart the system. Check if the power supply functions normally. Check the content: 3. Verify the input voltage is stable and there is no overvoltage, undervoltage, or phase loss. Remedy: After fixing the power line issue, restart the system using the proper startup procedure. Check the content: 4. Inspect the power rectifier for short circuits. Remedy: Replace the rectifier if needed. Check the content: 5. Evaluate the power device for damage. If the input rectifier module is damaged, replace it with a similar unit. Check the drive circuit for damage and replace as necessary. If required, replace the input plating rectifier module.