I installed new ink cartridges and my product seems to be doing a long cleaning cycle. Is this normal?

• When an ink cartridge is installed in the printer, the printer charges the ink system. This takes about 90 seconds. While the ink is charging the  power light flashes. Never turn off the printer while the  power light is flashing (unless the printer hasn't moved or made noise for more than 5 minutes). This initialization is a normal and necessary process. If the printer initialization does not stop after 5 minutes, turn off the printer and contact Epson technical support for assistance.