3. '''Switch off the [[#Light switches|lights]]''' everywhere except in the warm room.
4. Check that '''Telescope Power Control''' (on the wall just inside the front door) is set to '''PLC'''. If not, [[#Contact numbers|call a technician]].
If observing in Sutherland: in the warm room, '''on the wall-mounted mimic panel''' at the left-hand end of the desk ('''if observing remotely, these things will be done by the on-site technicians'''):