In the Qu system, the cash drawer is routed through the printer. This means that an error on the printer will prevent the cash drawer from popping. If the cash drawer does not open:
- Check if the printer is out of paper.
- Check for any error lights on the printer.
- Check to ensure that the cable connecting the printer to the cash drawer is securely plugged in at both ends.
- If you hear the cash drawer clicking, but it does not open, verify that the cash drawer is not locked. If the key lock is vertical, it is unlocked; horizontal, it is locked.