after power on, will automatically detect the iron head parameters, found short circuit or open circuit and other abnormalities, in the case of fuse is not broken, the red LED flashes for 3 seconds, LCD display the corresponding error code, press the [power] key or 1 minute to shut down.
If a short circuit occurs on the board, the fuse will be broken, the PCBA will not work properly and needs to be returned to the factory for repair.
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