When removing the upper casing Insert a flat head screwdriver into the recess in the back plate and remove the upper casing. (2 locations) • The remote controller circuit board is attached to the upper casing. Be careful not to damage the circuit board and casing when removing the upper casing. • Do not touch the remote controller circuit board directly with your hands. • Be careful not to allow dust or moisture to adhere to the circuit board when the upper casing is removed. CAUTION 13