For the most part, error 0X69 code on Epson printer happens in the Epson WF3640& 3620 Printer because of the circuit issue that can be related to printing engine or ink framework issue. Thus, you should turn ON the printer and attachment it off abruptly. This interaction ought to be done when your printer is boosting.
If you still face the same error frequently then it is time to take expert advice. Contact Epson printer support phone number for a quick fix.