Sorry for not responding sooner, I’m on vacation this week, but occasionally checking/answering emails from home.
If your printer’s pump is turning on regularly while the printer sits idle, then you may have a cartridge that’s not correctly pressurizing. My guess is to check the carts on the right side first: if the printer worked well with the flush carts, then reinstall the flush carts into the right bay and close the door, then wait a while to listen for the pump. If the pump doesn’t come on, then open the door, and replace one of the flush carts with the Piezo carts, and close the door to listen again. If/when the printer’s pump comes on after installing a Piezo cart, then remove that cart and reinstall the flush cart, to check if the pump doesn’t come on- and if it doesn’t, then that position Piezo cart isn’t holding pressure correctly, and we will send you a replacement cart.
Please let me know what you find, or if you have any questions.
Thanks and best regards~ Dana