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[Cause (1)] The over voltage protection function is operating:
The output is interrupted by the over voltage protection function if the output voltage variable trimmer is turned too far or the settings of the over voltage adjustment trimmer are too low.
[Cause (2)] The over current protection function is operating:
Excessive currents flow and the over current protection function operates in cases such as when the load is short.
[Cause (3)] The thermal protection function is operating:
The output is stopped by the thermal protection function in cases such as where the ambient temperature is high or when the forced air cooling device malfunctions.