Hi all,

I've bought an hy6040 but I'm encoutering an issue when I try to powerd it up. My VFD screen is blinking with number 0.0, so I can't do anything if I turn the knob to change frequency nothing happend, if I pressed run/stop same isue nothing happend. Is anyone know why my vfd is blinking red? I can enter in programming mode but it semmes I can't change anything.