A liquid ejecting device comprising: a head unit; and a head unit control circuit provided outside and configured to control the head unit, the head unit including: an ejecting section (D) that includes a piezoelectric element (PZ), and can eject a liquid corresponding to displacement of the piezoelectric element (PZ), the piezoelectric element (PZ) being displaced corresponding to a change in potential of a drive signal when the drive signal has been supplied to the piezoelectric element (PZ); a determination circuit that is configured to determine whether or not the piezoelectric element (PZ) has a predetermined electrical storage capability; and an ejection limit circuit that is configured to stop the supply of the drive signal to the piezoelectric element (PZ) and is configured to limit the ejection of the liquid from the ejecting section (D) when a result of the determination is negative, the head unit control circuit including: a first terminal (ZN1-2) that outputs an instruction signal that instructs the head unit to execute the determination; a second terminal (ZN1-5) that outputs the drive signal; and a third terminal (ZN1-3) that is provided between the first terminal (ZN1-2) and the second terminal (ZN1-5), the third terminal (ZN1-3) being set to a ground potential. a head unit; and a head unit control circuit provided outside and configured to control the head unit, the head unit including: an ejecting section (D) that includes a piezoelectric element (PZ), and can eject a liquid corresponding to displacement of the piezoelectric element (PZ), the piezoelectric element (PZ) being displaced corresponding to a change in potential of a drive signal when the drive signal has been supplied to the piezoelectric element (PZ); a determination circuit that is configured to determine whether or not the piezoelectric element (PZ) has a predetermined electrical storage capability; and an ejection limit circuit that is configured to stop the supply of the drive signal to the piezoelectric element (PZ) and is configured to limit the ejection of the liquid from the ejecting section (D) when a result of the determination is negative, an ejecting section (D) that includes a piezoelectric element (PZ), and can eject a liquid corresponding to displacement of the piezoelectric element (PZ), the piezoelectric element (PZ) being displaced corresponding to a change in potential of a drive signal when the drive signal has been supplied to the piezoelectric element (PZ); a determination circuit that is configured to determine whether or not the piezoelectric element (PZ) has a predetermined electrical storage capability; and an ejection limit circuit that is configured to stop the supply of the drive signal to the piezoelectric element (PZ) and is configured to limit the ejection of the liquid from the ejecting section (D) when a result of the determination is negative, the head unit control circuit including: a first terminal (ZN1-2) that outputs an instruction signal that instructs the head unit to execute the determination; a second terminal (ZN1-5) that outputs the drive signal; and a third terminal (ZN1-3) that is provided between the first terminal (ZN1-2) and the second terminal (ZN1-5), a first terminal (ZN1-2) that outputs an instruction signal that instructs the head unit to execute the determination; a second terminal (ZN1-5) that outputs the drive signal; and a third terminal (ZN1-3) that is provided between the first terminal (ZN1-2) and the second terminal (ZN1-5), the third terminal (ZN1-3) being set to a ground potential. <EOS>