In a case where an identification information item determination section (411) determines that a first identification information item indicates a non-replacement part, a first backup section (412) backs up the first identification information item in a backup memory (420). In a case where a confirmation section (413) determines that the first identification information item is not backed up in the backup memory (420), a second backup section (414) backs up the first identification information item in the backup memory (420). In a case where the confirmation section (413) determines that the first identification information item is backed up in the backup memory (420), a storage process section (415) updates the first identification information item stored in a communication section-side memory (430) with a second identification information item stored in the backup memory (420).
