The Door Controller Unit is an object found in the Ice Hive on the planet Arcterra. It is used the Vault Door. Before Samus can use it however, she must reactivate various Energy Routers and destroy Barbed War Wasp hives. Once Samus does this, the Controller Unit will activate and Samus can Scan the Unit to lower the door, opening up the rest of the Ice Hive for furher exploration.
"Vault door controls are operational."
- Occasionally after being scanned the cutscene will play, but the door won't open.
if said occurrence takes place after obtaining the Judicator, a lone crystal by the nearby portal may be used to get back there.