22 LED LCD display Product status POWER ERROR Cartridge loading or replacement required (U “Installing the Ink Cartridges” on page 41) Roll paper loading or replacement required (U “Loading Roll Paper” on page 40) Ink head cleaning standby (U “Ink Head Cleaning” on page 77) Ink head cleaning • Thermal head high temperature • Ink head high temperature • Motor driver high temperature (U “Automatic Recovery Error” on page 82) • In power-on sequence • In power-off sequence Firmware rewriting (data receive in progress) Firmware rewriting (data writing, restoration in progress)