Name and Function of Each Part Pressure Regulator for subtanks and cartridge check lamp 21 No. Name Description 1 Pressure regulator for subtanks Indicates the air pressure that is supplied to the sub tank on each ink path. Specified value is 34±1 kPa. 2 Cartridge check lamp Indicates the status of the ink cartridges and ink. • Red On: • There is no ink remaining in the cartridge. Replace the ink cartridge. • The ink cartridge is not connected. Connect the ink car- tridge. • The ink type or color is not correct. Connect the correct ink cartridge. Flashing: The ink rack front bar is open. • Green On: Ink is being supplied to the ink path. Flashing: The ink rack front bar is open.