- Turn OFF the main power.
 - Remove the SD slot cover of the controller unit.
 - Set the SD card in the service slot.
 - Turn ON the main power.
 - Execute SP5-846-052 (address book information restore).
 - Turn OFF the main power.
 - Remove the SD card.
 - Attach the SD slot cover to the original position.
 - Turn ON the main power, and check that the address book has been restored.

- User code counter information is initialized.
 - Administrator and supervisor information is not backed up. Also, it is not erased during restore.
 - If a download file does not exist, or if erasure is complete, execution malfunction is displayed.