LED blinking
Overcurrent protection is working.
When the output current exceeds the rated current value, overcurrent protection is activated, the voltage drops, and the LED turns off. When the output current drops, the output voltage also returns and the LED lights up. This is repeated.
The power supply is working properly.
Since the load is heavy, change the power supply to one with a large capacity.
When the peak current flows at startup like a motor, select the power supply based on the peak current value.
Overcurrent protection works when the power supply is selected with a constant current.
LED Off
The power is not output when the LED is off. Check input voltage, overvoltage protection, sensing, remote control, etc
Not entered
The proper voltage is not input to the power supply.
The fuse on the power input side may be blown or the breaker may be tripped.
If the fuse is blown, replace it and return the breaker. Check the wiring just in case.
Overvoltage protection working
When the overvoltage protection is activated, the output will stop.
The output voltage of the constant voltage power supply does not rise.
The cause is that overvoltage protection operates when a voltage (counter electromotive voltage) is applied from the load side.
The counter electromotive voltage is the voltage applied to the power supply side when the current of the motor changes significantly when the load is a motor. Actually, the reproduction experiment is difficult.
After taking measures against them, turn off the input and re-enter.
If it still does not output, the power supply itself may be defective and will be returned to the manufacturer.
Sensing terminal is open
For power supplies with a sensing function, if the sensing terminals (+ S, -S) are open, the output voltage rises and overvoltage protection operates and the output stops.
Connect the sensing terminal to the load, or connect the sensing terminal to the output terminal (+ V, -V) of the power supply with a short piece.
Remote ON / OFF control is OFF
When the OFF signal is output to the power supply by remote control, the power supply stops.
The OFF signal can be turned off with the power input by inputting a voltage of 0.5V or less to the connector.
Returns the remote control signal from OFF to ON.
Fan abnormality
Stop
In addition to fan failure, the power supply fan stops when the load is light (10% or less) and when the remote control function is OFF.
The power supply itself is normal.
Abnormal noise
It is the same as the “abnormal noise (fan)” mentioned above.
Output error
Output stop
Same as “LED goes off” above.
High output voltage
The variable output voltage volume is turning to the right (clockwise).
Return the variable output voltage volume to the left (counterclockwise).
The output voltage is low
Measure the voltage on the power supply side, not the voltage on the device side.
The variable output voltage volume is turning to the left (counterclockwise).
Return the variable output voltage volume to the right (clockwise).
Alternatively, the capacity of the electrolytic capacitor may be lost (life).
Replace the power supply.
Output voltage is unstable
Overcurrent protection is working.
When the output current exceeds the rated current value, the overcurrent protection works and the voltage drops, and when the output current drops, the output voltage returns to the original value. Repeat this.
The power supply is operating normally, so change the capacity of the power supply to a larger one.
This is the end of the article.
Repair and analysis methods differ depending on the manufacturer, so please check before requesting.
Thank you for reading.