Image forming appts e.g. copier, facsimile, printer - has toner existence detector which detects existence of toner in each toner accommodation units, based on whose output toner accommodation unit is changed

摘要

The appts has a toner existence detector that detects the existence of toner in each of the toner accommodation units. A warning unit exchanges the toner accommodation units based on the output of toner existence detector accommodation device. A judgment unit judges whether the toner accommodation units have been exchanged. If exchange has occurred, the toner is refilled in a developer, a recovery operation is performed by a recovery control unit and the warning signal of the warning unit that is input to the toner accommodation unit is terminated before completion of the recovery operation.